# 2019 in paleomalacology

* Paleontology portal
* History of science portal
This list 2019 in paleomalacology is a list of new taxa of ammonites and other fossil cephalopods, as well as fossil gastropods, bivalves and other molluscs that are scheduled to be described during the year 2019, as well as other significant discoveries and events related to molluscan paleontology that are scheduled to occur in the year 2019.

## General research

* Description of an assemblage of conchiferan mollusks from the Cambrian Shackleton Limestone (Antarctica) is published by Claybourn et al. (2019).
* A study on Early Triassic recovery of ammonites and gastropods after the Permian–Triassic extinction event is published by Pietsch et al. (2019).
* A study on the impact of the Cenomanian-Turonian boundary event and other Cretaceous oceanic anoxic events on generic- and species-level molluscan diversity, extinction rates and ecological turnover is published by Freymueller, Moore & Myers (2019).
* A juvenile ammonite specimen assigned to the genus Puzosia and four marine gastropods are reported from the Cretaceous Burmese amber of Myanmar by Yu et al. (2019).
* A study on the timing and nature of recovery of benthic marine ecosystems of Antarctica after the Cretaceous–Paleogene extinction event, as indicated by data from fossils of benthic molluscs, is published by Whittle et al. (2019).

## Ammonites
### Research

* Dimorphic Indonesian ammonite Macrocephalites keeuwensis is reported from the core of Jara Dome (Kutch district, India) by Jain (2019).
* Description of new fossils of members of the genus Lytohoplites from the Neuquén Basin (Argentina), taxonomic revision of the Lytohoplites species occurring in this basin, and a study on the ontogeny, probable sexual dimorphism and spectrum of intraspecific variability of members of this genus, is published by Vennari & Aguirre-Urreta (2019).
* A study on the intraspecific variation through the ontogeny of the Late Cretaceous ammonite Scaphites whitfieldi from the Western Interior of the United States is published by Klein & Landman (2019).
* A lower jaw of Spathites puercoensis is described from the Turonian Carlile Member of the Mancos Shale (New Mexico, United States) by Landman et al. (2019).
* A study on periodic variations in carbon and oxygen stable isotope profiles from Campanian and Maastrichtian ammonites belonging to the genus Baculites, and on their implications for inferring the life histories of these ammonites, is published by Ellis & Tobin (2019).
* A study on the hydrostatic properties of the orthoconic morphotype of Baculites compressus and on their implications for the knowledge of the mode of life of this animal is published by Peterman et al. (2019).
* A study on the ecology and growth of baculitid and scaphitid ammonites from the Maastrichtian Owl Creek Formation (Mississippi, United States), evaluating whether these taxa may have migrated, is published by Ferguson et al. (2019).
* A study on a sutural anomaly of ammonite specimens known as sutural pseudoinversion is published by Rogov (2019).
* A study on the systematics of Late Cretaceous ammonites from the southeastern San Juan Basin (Sandoval County, New Mexico) and on the stratigraphic framework of their fossils is published by Sealey & Lucas (2019).
* A study on the ontogenetic trajectories of septal spacing between succeeding chambers in Hypophylloceras subramosum and Phyllopachyceras ezoense is published online by Iwasaki, Iwasaki & Wani (2019).
* A study on the intra- and interspecific variation and ontogenetic trajectories of the kossmaticeratid species Maorites densicostatus and Maorites seymourianus is published by Morón-Alfonso (2019).
* A pathological ammonite specimen characterized by a pronounced left-right asymmetry in both ornamentation and suture lines is described from the Toarcian of southern France by Jattiot et al. (2019).
* A study on the morphology and function of hook-like structures found in the body chambers of six specimens of Rhaeboceras halli is published online by Kruta et al. (2019).

### New taxa

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes |
| Albanesiceras | Gen. et sp. nov | Valid | Galácz | Middle Jurassic (Bathonian) | | Italy | A member of the family Perisphinctidae. The type species is A. damianoi. |
| Albanites americanus | Sp. nov | Valid | Brayard et al. | Early Triassic | | United States ( Idaho) | |
| Allocrioceras irregulare | Sp. nov | Valid | Kennedy & Kaplan | Late Cretaceous (Turonian) | | Germany | |
| Anagaudryceras calabozoi | Sp. nov | Valid | Raffi & Olivero in Raffi, Olivero & Milanese | Late Cretaceous (Campanian) | Cerro Toro Formation Rabot Formation Santa Marta Formation | Antarctica (James Ross Island)  Chile | |
| Anagaudryceras sanctuarium | Sp. nov | Valid | Raffi & Olivero in Raffi, Olivero & Milanese | Late Cretaceous (Campanian/Maastrichtian boundary) | Snow Hill Island Formation | Antarctica (James Ross Island) | |
| Anagaudryceras subcompressum | Sp. nov | Valid | Raffi & Olivero in Raffi, Olivero & Milanese | Late Cretaceous (Maastrichtian) | Snow Hill Island Formation | Antarctica (James Ross Island) | |
| Araxoceltites | Gen. et 3 sp. nov | Valid | Korn, Ghaderi & Tabrizi | Permian (Changhsingian) | | Iran | Genus includes new species A. sanestapanus, A. laterocostatus and A. cristatus. |
| Araxoceras insolens | Sp. nov | Valid | Korn & Ghaderi | Permian (Wuchiapingian) | | Iran | |
| Araxoceras truncatum | Sp. nov | Valid | Korn & Ghaderi | Permian (Wuchiapingian) | | Iran | |
| Balearites berryae | Sp. nov | Valid | Vermeulen et al. | Early Cretaceous | | Spain | |
| Beckeroceras | Gen. et comb. nov | Valid | Naglik, De Baets & Klug | Devonian (Emsian) | Dzhaus Beds | Uzbekistan | A member of Agoniatitida belonging to the family Mimosphinctidae. The type species is "Erbenoceras" khanakasuensis Yatskov (1990). |
| Beulia | Gen. et sp. nov | Valid | Korn & Price | Devonian (Famennian) | | Germany | Genus includes new species B. wunderlichi. |
| Borealiceras | Gen. et comb. nov | Valid | Vermeulen et al. | Early Cretaceous | | Germany | Genus includes "Crioceras" stadtlaenderi Müller (1892). |
| Caribouceras | Gen. et sp. nov | Valid | Brayard et al. | Early Triassic | | United States ( Idaho) | Genus includes new species C. slugense. |
| Carpathiceras | Gen. et comb. et sp. nov | Valid | Meister & Schlögl | Early Jurassic (Sinemurian) | | Slovakia | A member of Asteroceratinae. The type species is "Coroniceras (Paracoroniceras)" bordoti Guérin-Franiatte (1966); genus also includes new species C. misiki. |
| Carthaginites multituberculatus | Sp. nov | Valid | Kennedy in Gale, Kennedy & Walaszczyk | Late Cretaceous (Cenomanian) | Cauvery Basin | India | A member of the family Turrilitidae. |
| Chieseiceras dolomiticum | Sp. nov | Valid | Brack & Rieber | Middle Triassic (Late Anisian) | | Italy | |
| Chtelnicaceras | Gen. et sp. nov | Valid | Meister & Schlögl | Early Jurassic (Sinemurian) | | Slovakia | An ammonite with an intermediate morphology between Arietitidae and Oxynoticeratidae. Genus includes new species C. janus. |
| Damesites africanus | Sp. nov | Valid | Kennedy & Lobitzer | Late Cretaceous (Cenomanian) | Odukpani Formation | Nigeria | A member of the family Desmoceratidae. |
| Docidoceras higginsi | Sp. nov | Valid | Chandler | Middle Jurassic (Bajocian) | | United Kingdom | |
| Dzhaprakoceras brodheadense | Sp. nov | Valid | Work & Mason | Carboniferous (Tournaisian) | Borden Formation | United States ( Kentucky) | |
| Eogunnarites? elegans | Sp. nov | Valid | Kennedy in Gale, Kennedy & Walaszczyk | Late Cretaceous (Cenomanian) | Cauvery Basin | India | A member of the family Kossmaticeratidae. |
| Epophioceras nodosus | Sp. nov | Valid | Meister & Schlögl | Early Jurassic (Sinemurian) | | Slovakia | |
| Euomphaloceras varicostatum | Sp. nov | Valid | Kennedy in Gale, Kennedy & Walaszczyk | Late Cretaceous (Cenomanian) | Cauvery Basin | India | |
| Falciclymenia cabrierensis | Sp. nov | Valid | Korn & Price | Late Devonian | | France | |
| Finiclymenia czarnockii | Sp. nov | Valid | Korn & Price | Devonian (Famennian) | | Central Europe | A gonioclymeniid ammonite. |
| Finiclymenia langei | Sp. nov | Valid | Korn & Price | Devonian (Famennian) | | Central Europe | A gonioclymeniid ammonite. |
| Flickia bullata | Sp. nov | Valid | Kennedy & Lobitzer | Late Cretaceous (Cenomanian) | Odukpani Formation | Nigeria | |
| Follotites bighillensis | Sp. nov | Valid | Work & Mason | Carboniferous (Tournaisian) | Borden Formation | United States ( Kentucky) | |
| Gaudryceras submurdochi | Sp. nov | Valid | Raffi & Olivero in Raffi, Olivero & Milanese | Late Cretaceous (Campanian) | Rabot Formation Santa Marta Formation | Antarctica (James Ross Island) | |
| Glaphyrites taimyricus | Sp. nov | Valid | Konovalova & Borissenkov in Borissenkov, Konovalova & Kutygin | Carboniferous | Makarovskaya Formation | Russia ( Krasnoyarsk Krai) | |
| Glaucoceras | Gen. et comb. nov | Valid | Matamales-Andreu et al. | Early Cretaceous (Hauterivian) | | Spain  Switzerland | A new genus for "Baculites" renevieri Ooster (1860). |
| Glyptoxoceras (?) tenuicostatum | Sp. nov | Valid | Kennedy & Kaplan | Late Cretaceous (Turonian) | | Germany | A member of the family Diplomoceratidae. |
| Hoevelia | Gen. et sp. nov | Valid | Korn & Price | Devonian (Famennian) | | Germany | Genus includes new species H. schindewolfi. |
| Homoeoplanulites todaginensis | Sp. nov | Valid | Poulton & Hall | Middle Jurassic (Callovian) | | Canada ( British Columbia) | |
| Hoploscaphites macer | Sp. nov | Valid | Landman et al. | Late Cretaceous (Maastrichtian) | Bearpaw Shale Pierre Shale | United States ( Colorado Montana Wyoming) | |
| Ivoites meshchankinae | Sp. nov | Valid | Naglik, De Baets & Klug | Devonian (Emsian) | | Czech Republic  Uzbekistan | A member of Agoniatitida belonging to the family Mimosphinctidae. |
| Kamerunoceras multinodosum | Sp. nov | Valid | Kennedy in Gale, Kennedy & Walaszczyk | Late Cretaceous (Turonian) | Karai Formation | India | |
| Kayutoceras pogrebitskyi | Sp. nov | Valid | Borissenkov & Kutygin in Borissenkov, Konovalova & Kutygin | Carboniferous | Olen'ynskaya Formation | Russia ( Krasnoyarsk Krai) | |
| Kirsoceras arteseptatum | Sp. nov | Valid | Bockwinkel, Korn & Herd | Devonian (Famennian) | | Germany | |
| Kirsoceras gelamenum | Sp. nov | Valid | Bockwinkel, Korn & Herd | Devonian (Famennian) | | Germany | |
| Kitabobactrites | Gen. et sp. nov | Valid | Naglik, De Baets & Klug | Devonian (Emsian) | | Czech Republic  Uzbekistan | A member of Bactritida belonging to the family Bactritidae. The type species is K. salimovae. |
| Kumetaceras | Gen. et sp. nov | Valid | Galácz | Middle Jurassic (Bathonian) | | Italy | A possible member of the family Spiroceratidae. The type species is K. enigmaticum. |
| Kunnamiceras | Gen. et comb. nov | Valid | Kennedy in Gale, Kennedy & Walaszczyk | Late Cretaceous (Cenomanian) | Cauvery Basin | India  Madagascar | A member of the subfamily Acanthoceratinae. The type species is "Ammonites" tropicus Stoliczka (1865); genus also includes "Protacanthoceras" imperatoris Wright & Kennedy (1980). |
| Latiwitchellia atacamensis | Sp. nov | Valid | Dietze & von Hillebrandt | Middle Triassic (Bajocian) | | Chile | |
| Lissoceras maerteni | Sp. nov | Valid | Pavia & Fernandez-Lopez | Middle Jurassic (Bajocian) | | France | A member of Haploceratoidea belonging to the family Lissoceratidae. |
| Lissoceras maizetense | Sp. nov | Valid | Pavia & Fernandez-Lopez | Middle Jurassic (Bajocian) | | France | A member of Haploceratoidea belonging to the family Lissoceratidae. |
| Lissoceras ovale | Sp. nov | Valid | Pavia & Fernandez-Lopez | Middle Jurassic (Bajocian) | El Pedregal Formation | France  Germany  Hungary  Spain | A member of Haploceratoidea belonging to the family Lissoceratidae. |
| Lissoceras sturanii | Sp. nov | Valid | Pavia & Fernandez-Lopez | Middle Jurassic (Bajocian) | | France  Italy  Russia ( Dagestan)  Turkmenistan | A member of Haploceratoidea belonging to the family Lissoceratidae. |
| Lissoceras submediterraneum | Sp. nov | Valid | Pavia & Fernandez-Lopez | Middle Jurassic (Bajocian) | El Pedregal Formation | France  Spain | A member of Haploceratoidea belonging to the family Lissoceratidae. |
| Loyezia roberti | Sp. nov | Valid | Vermeulen et al. | Early Cretaceous (Hauterivian) | | Spain | A member of the family Crioceratitidae. |
| Maeneceras tabasense | Sp. nov | Valid | Korn et al. | Probably late early Famennian | | Iran | A member of the family Sporadoceratidae. |
| Medioclymenia media | Sp. nov | Valid | Korn & Price | Devonian (Famennian) | | Central Europe | A gonioclymeniid ammonite. |
| Megatirolites | Gen. et comb. nov | Valid | Balini et al. | Early Triassic (Olenekian) | Sefid-Kuh Limestone Tartaly Formation | Iran  Kazakhstan | A member of Ceratitida belonging to the superfamily Dinaritoidea and to the family Tirolitidae. The type species is "Tirolites" rossicus Kiparisova (1947); genus also includes "Tirolites" armatus Shevyrev (1968). |
| Menuites armatus | Sp. nov | Valid | Shigeta in Shigeta, Izukura & Nishimura | Late Cretaceous (Campanian) | Chinomigawa Formation | Japan | A member of the family Pachydiscidae. |
| Mesodistichites | Gen. et comb. et sp. nov | Valid | Krystyn et al. | Late Triassic (Norian) | Nayband Formation | Iran | A member of Ceratitida belonging to the family Distichitidae. The type species is "Distichites" tozeri Seyed-Emami (1975); genus also includes new species M. evolutus. |
| Metabactrites rakhmonovi | Sp. nov | Valid | Naglik, De Baets & Klug | Devonian (Emsian) | | Uzbekistan | A member of Agoniatitida belonging to the family Mimosphinctidae. |
| Microderoceras crassiornatum | Sp. nov | Valid | Meister & Schlögl | Early Jurassic (Sinemurian) | | Slovakia | |
| Microderoceras serratum | Sp. nov | Valid | Meister & Schlögl | Early Jurassic (Sinemurian) | | Slovakia | |
| Nelomites | Nom. nov | Valid | Bockwinkel, Korn & Herd | Devonian (Famennian) | | Kazakhstan | A replacement name for Melonites Bogoslovskii (1971). |
| Neophylloceras nodosum | Sp. nov | Valid | Shigeta in Shigeta, Izukura & Nishimura | Late Cretaceous (Campanian) | Chinomigawa Formation | Japan | A member of the family Phylloceratidae. |
| Noridiscites nodosus | Sp. nov | Valid | Krystyn et al. | Late Triassic (Norian) | Nayband Formation | Iran | A member of Ceratitida belonging to the family Noridiscitidae. |
| Oraniceras calvum | Sp. nov | Valid | Gulyaev | Middle Jurassic (Bathonian) | | Russia | A member of the family Parkinsoniidae. |
| Oraniceras issae | Sp. nov | Valid | Gulyaev | Middle Jurassic (Bathonian) | | Russia | A member of the family Parkinsoniidae. |
| Pachydiscus wrighti | Sp. nov | Valid | Kennedy | Late Cretaceous | | United Kingdom | |
| Paracrioceras damaisi | Sp. nov | Valid | Vermeulen et al. | Early Cretaceous | | | |
| Parasolenoceras ribiraense | Sp. nov | Valid | Shigeta in Shigeta, Izukura & Nishimura | Late Cretaceous (Campanian) | Chinomigawa Formation | Japan | A member of the family Diplomoceratidae. |
| Paroecotraustes minor | Sp. nov | Valid | Galácz | Middle Jurassic (Bathonian) | | Italy | A member of the family Oppeliidae. |
| Pernaceras | Gen. et comb. nov | Valid | Vermeulen et al. | Early Cretaceous | | France | Genus includes "Ammonites" assimilis Matheron (1880). |
| Phlycticeras tenue | Sp. nov | Valid | Galácz | Middle Jurassic (Bathonian) | | Italy | A member of the family Strigoceratidae. |
| Praechebbites | Gen. et sp. et comb. nov | Valid | Becker et al. | Devonian (Emsian) | | Morocco  China?  France? | A member of the family Mimosphinctidae belonging to the new subfamily Chebbitinae. The type species is P. debaetsi; genus might also include "Anetoceras (Erbenoceras)" mattei Feist (1970) and "Teicherticeras" ilanense Shen (1975). |
| Prolecanites akiyoshiensis | Sp. nov | Valid | Fujikawa | Carboniferous | Akiyoshi Limestone | Japan | |
| Protacanthoceras parva | Sp. nov | Valid | Kennedy in Gale, Kennedy & Walaszczyk | Late Cretaceous (Cenomanian) | Cauvery Basin | India | A member of the subfamily Acanthoceratinae. |
| Pseudocrassiceras | Gen. et comb et sp. nov | Valid | Rulleau & Jattiot | Early Jurassic (Toarcian) | | France  Spain | A member of the family Hildoceratidae. The type species is "Ammonites" bayani Dumortier (1874); genus also includes "Ammonites" frantzi Reynès (1868), "Hildoceras" comense var. praegruneri Monestier (1931) (raised to the rank of a separate species Pseudocrassiceras praegruneri) and a new species P. arbaulti. |
| Pseudosonninia | Gen. et sp. nov | Valid | Parent et al. | Middle Jurassic (Callovian) | Los Molles Formation | Argentina | A member of the family Oppeliidae. The type species is P. chacaymelehuensis. |
| Puzosia (Bhimaites) falx | Sp. nov | Valid | Kennedy in Gale, Kennedy & Walaszczyk | Late Cretaceous (Cenomanian) | Cauvery Basin | India | |
| Schlueterella stinnesbecki | Sp. nov | Valid | Ifrim | Late Cretaceous (Turonian-Coniacian) | | Mexico | A member of the family Diplomoceratidae. |
| Semilissoceras | Gen. et 3 sp. et comb. nov | Valid | Pavia & Fernandez-Lopez | Middle Jurassic (Bajocian) | | Algeria  France  Portugal  Spain  United Kingdom | A member of Haploceratoidea belonging to the family Lissoceratidae. The type species is S. ellipticum; genus also includes new species S. turgidulum and S. costellatum, as well as "Oppelia" depereti Flamand (1911) and "Lissoceras" semicostulatum Buckman (1923). |
| Sicilisphinctes | Gen. et sp. nov | Valid | Galácz | Middle Jurassic (Bathonian) | | Italy | A member of the family Perisphinctidae. The type species is S. incertus. |
| Siemiradzkia mangoldi | Sp. nov | Valid | Metodiev | Middle Jurassic (Bathonian) | Bov Formation | Bulgaria  France | A member of the family Perisphinctidae. |
| Sikeliceras | Gen. et sp. nov | Valid | Galácz | Middle Jurassic (Bathonian) | | Italy | A possible member of the family Spiroceratidae. The type species is S. costatum. |
| Sokurella elshankae | Sp. nov | Valid | Gulyaev | Middle Jurassic (Bathonian) | | Russia | A member of the family Parkinsoniidae. |
| Sokurella pletniovkae | Sp. nov | Valid | Gulyaev | Middle Jurassic (Bathonian) | | Russia | A member of the family Parkinsoniidae. |
| Stephanoceras (Skirroceras) englandi | Sp. nov | Valid | Chandler | Middle Jurassic (Lower Bajocian) | Inferior Oolite Formation | United Kingdom | |
| Stephanoceras (Riccardiceras) eoeteosum | Sp. nov | Valid | Chandler | Middle Jurassic (Middle or Upper Aalenian) | Inferior Oolite Formation | United Kingdom | |
| Uptonia schlatteri | Sp. nov | Valid | Fauré & Téodori | Early Jurassic (Pliensbachian) | | France | |
| Uzbekisphinctes | Gen. et comb. nov | Valid | Naglik, De Baets & Klug | Early Devonian | Daleje Shale Dzhaus Beds Middle Kaub Formation | China  Czech Republic  Germany  Uzbekistan | A member of Agoniatitida belonging to the family Mimosphinctidae. The type species is "Teicherticeras" rudicostatum Bogoslovsky (1980); genus also includes "Convoluticeras" discordans Erben (1965) and "Teicherticeras" primigenitum Erben (1965). |
| Vedioceras fusiforme | Sp. nov | Valid | Korn & Ghaderi | Permian (Wuchiapingian) | | Iran | A member of the family Araxoceratidae. |
| Watinoceras elegans | Sp. nov | Valid | Kennedy in Gale, Kennedy & Walaszczyk | Late Cretaceous (Cenomanian) | Cauvery Basin | India | |
| Zelandites pujatoi | Sp. nov | Valid | Raffi, Olivero & Milanese | Late Cretaceous (Campanian) | Rabot Formation Santa Marta Formation | Antarctica (James Ross Island) | |

## Other cephalopods
### Research

* A study on hydrostatic properties of early Paleozoic nautiloid and endoceratoid cephalopods, and on its implications for the knowledge of ecology of these cephalopods, is published by Peterman, Barton & Yacobucci (2019).
* A study on the distribution and diversity of cephalopods during the Cambrian–Ordovician transition is published by Fang et al. (2019).
* A study on cephalopod occurrences in South China and adjacent areas during the Middle to Late Ordovician, aiming to define biogeographic provinces, is published by Fang et al. (2019).
* A study on changes of geographic range size and rates of speciation and extinction in nautiloid and ammonoid cephalopods living in the North American Midcontinent Sea from the Carboniferous (Pennsylvanian)-early Permian is published by Kolis & Lieberman (2019).
* Ascocerid fossils are described from the Hirnantian?–Llandovery strata of the Eusebio Ayala and Vargas Peña formations (southeastern Paraguay) by Cichowolski et al. (2019), representing the first ascocerid record from high paleolatitudes of Gondwana.
* A juvenile specimen of Dolorthoceras, representing the first Devonian cephalopod specimen preserving nacreous structures and the first ectocochleate cephalopod preserving fibrous structures within its conch, is described from the Frasnian Domanic Formation (Russia) by Doguzhaeva (2019).
* A study on the response of cephalopod assemblages from the area of the present-day European Russia to environmental changes during the early Aptian Oceanic Anoxic Event is published by Rogov et al. (2019).
* A study on the paleobiology of cephalopods from the Albian Mahajanga Basin of Madagascar will be published by Hoffmann et al. (2019).
* A proposal for revision of the classification of nautiloid cephalopods presented in Treatise Part K is presented by King & Evans (2019), who name a new subclass Tarphyceratia, new order Rioceratida and new family Bactroceratidae.
* A study on embryonic and early juvenile development of shell in Peismoceras is published by Manda & Turek (2019).
* A study on changes of the morphological diversity of Late Permian coiled nautiloids is published online by Korn et al. (2019).
* A study on the paleobiology of Angulithes mermeti, based on new material from the upper Cenomanian of Egypt, and on its implications for the knowledge of the evolution of Cenomanian lineage of Angulithes, is published by Wilmsen & Nagm (2019).
* A study on the anatomy of Gordoniconus beargulchensis and on its implications for the knowledge of evolution of coleoids is published by Klug et al. (2019).
* A study on a putative Sinemurian octocoral Mesosceptron from Montagna del Casale (Sicily, Italy) is published by Pignatti et al. (2019), who reinterpret the fossils of this taxon as incompletely preserved coleoid rostra, and consider Mesosceptron to be a subjective junior synonym of the genus Atractites.
* A study on four specimens of Clarkeiteuthis conocauda from the Toarcian Posidonia Shale (Germany) preserved with small bony fish in their arm crowns, on the feeding behaviour of members of this species, and on the differences in the mode of life of C. conocauda, Passaloteuthis bisulcata and Hibolithes semisulcatus, is published by Jenny et al. (2019).
* A study on belemnite body-size dynamics across the Pliensbachian–Toarcian boundary in the Peniche section (Lusitanian Basin, Portugal), evaluating its implications for the knowledge of the impact of the Pliensbachian–Toarcian boundary warming event on belemnite body size, is published by Rita et al. (2019).
* New belemnite fossils are described from the Berriasian–Hauterivian of Arctic Canada and North-East Greenland by Mutterlose et al. (2019), who also evaluate the implications of these fossils for the knowledge of spatial distribution patterns of belemnites at northern high latitudes.

### New taxa

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes |
| Andamanoceras | Gen. et sp. nov | Valid | Niko, Sone & Leman | Ordovician | Lower Setul Limestone | Malaysia | A member of Pseudorthocerida. Genus includes new species A. densiseptum. |
| Basiloceras | Gen. et sp. nov | Valid | Pohle, Klug & Haas | Devonian (Eifelian and Givetian) | | Morocco | A member of Oncocerida belonging to the family Acleistoceratidae. Genus includes new species B. goliath and B. david. |
| Beloitoceras thorslundi | Sp. nov | Valid | Kröger & Aubrechtová | Late Ordovician | Kullsberg Limestone Formation | Sweden | A member of the family Oncoceratidae. |
| Cabaneroceras | Gen. et sp. nov | Valid | Kröger & Gutiérrez-Marco | Ordovician (Darriwilian) | | Spain | A member of Intejocerida. Genus includes new species C. aznari. |
| Cameroceras motsognir | Sp. nov | Valid | Kröger & Aubrechtová | Late Ordovician | Kullsberg Limestone Formation | Sweden | |
| Cimomia kurkurensis | Sp. nov | Valid | Hewaidy, Qot & Moneer | Early Paleocene | Kurkur Formation | Egypt | A member of the family Hercoglossidae. |
| Clothoceras | Gen. et sp. nov | Valid | Kröger & Aubrechtová | Late Ordovician | Kullsberg Limestone Formation | Sweden | A member of the family Proteoceratidae. Genus includes new species C. thornquisti. |
| Danoceras skalbergensis | Sp. nov | Valid | Kröger & Aubrechtová | Late Ordovician | Kullsberg Limestone Formation | Sweden | |
| Deltoidonautilus hassani | Sp. nov | Valid | Hewaidy, Qot & Moneer | Late Paleocene | Tarawan Formation | Egypt | A member of the family Hercoglossidae. |
| Dicoelites aprilis | Sp. nov | Valid | Dzyuba in Dzyuba, Mitta & Sherstyukov | Middle Jurassic (Bajocian) | Djangura Formation | Russia ( Karachay-Cherkessia) | A belemnite. |
| Dicoelites octobris | Sp. nov | Valid | Dzyuba in Dzyuba, Mitta & Sherstyukov | Middle Jurassic (Bajocian) | Djangura Formation | Russia ( Karachay-Cherkessia) | A belemnite. |
| Discoceras amtjaernense | Sp. nov | Valid | Kröger & Aubrechtová | Late Ordovician | Kullsberg Limestone Formation | Sweden | |
| Discoceras nilssoni | Sp. nov | Valid | Kröger & Aubrechtová | Late Ordovician | Kullsberg Limestone Formation | Sweden | |
| Endoceras naekki | Sp. nov | Valid | Kröger & Aubrechtová | Late Ordovician | Kullsberg Limestone Formation | Sweden | |
| Engeseriteuthis | Gen. et sp. nov | Valid | Fuchs et al. | Late Jurassic (late Kimmeridgian to ?early Tithonian) | Geisental Formation | Germany | A member of Muensterelloidea. Genus includes new species E. arcuatus. |
| Eromangateuthis | Gen. et comb. nov | Valid | Fuchs | Early Cretaceous (Albian) | Allaru Formation | Australia | A member of Octobrachia belonging to the family Plesioteuthidae; a new genus for "Boreopeltis" soniae Wade (1993). |
| Etchesia | Gen. et sp. nov | Valid | Fuchs | Late Jurassic (Tithonian) | Kimmeridge Clay Formation | United Kingdom | A member of Coleoidea belonging to the family Muensterellidae. Genus includes new species E. martilli. |
| Furudaloceras | Gen. et sp. nov | Valid | Kröger & Aubrechtová | Late Ordovician | Kullsberg Limestone Formation | Sweden | A member of the family Cyrtogomphoceratidae. Genus includes new species F. tomtei. |
| Grafordites | Gen. et sp. nov | Valid | Niko & Mapes | Carboniferous (Kasimovian) | Graford Formation | United States ( Texas) | A member of the family Dentoceratidae. The type species is G. mcleodi. |
| Gujiaonautilus | Gen. et sp. nov | Valid | Miao et al. | Permian (Changhsingian) | Dalong Formation | China | A nautiloid. Genus includes new species G. longliensis. |
| Isbergoceras | Gen. et 2 sp. nov | Valid | Kröger & Aubrechtová | Late Ordovician | Kullsberg Limestone Formation | Sweden | A member of the family Graciloceratidae. The type species is I. niger; genus also includes I. consobrinum. |
| Isorthoceras nikwis | Sp. nov | Valid | Kröger & Aubrechtová | Late Ordovician | Kullsberg Limestone Formation | Sweden | A member of the family Proteoceratidae. |
| Isorthoceras sylphide | Sp. nov | Valid | Kröger & Aubrechtová | Late Ordovician | Kullsberg Limestone Formation | Sweden | A member of the family Proteoceratidae. |
| Isorthoceras urdr | Sp. nov | Valid | Kröger & Aubrechtová | Late Ordovician | Kullsberg Limestone Formation | Sweden | A member of the family Proteoceratidae. |
| Kullsbergoceras | Gen. et sp. nov | Valid | Kröger & Aubrechtová | Late Ordovician | Kullsberg Limestone Formation | Sweden | A member of the family Cyrtogomphoceratidae. Genus includes new species K. nissei. |
| Lambeoceras (Lambeoceras) balashovi | Sp. nov | Valid | Barskov & Marek | Ordovician (Katian) | | Russia | |
| Lambeoceras (Lambeoceras) hanae | Sp. nov | Valid | Barskov & Marek | Ordovician (Katian) | | Russia | |
| Lambeoceras (Lambeoceras) sibiricum | Sp. nov | Valid | Barskov & Marek | Ordovician (Katian) | | Russia | |
| Langgunites | Gen. et sp. nov | Valid | Niko, Sone & Leman | Ordovician | Lower Setul Limestone | Malaysia | A member of Pseudorthocerida. Genus includes new species L. mucronulatus. |
| Malayorthoceras | Gen. et sp. nov | Valid | Niko, Sone & Leman | Ordovician | Lower Setul Limestone | Malaysia | A member of Orthocerida. Genus includes new species M. gracilentum. |
| Muensterella jillae | Sp. nov | Valid | Fuchs et al. | Late Cretaceous (Turonian) | South Bosque Formation | United States ( Texas) | |
| Muensterella spinosa | Sp. nov | Valid | Fuchs et al. | Late Jurassic (Tithonian) | Mörnsheim Formation | Germany | |
| Muensterellina | Gen. et sp. nov | Valid | Fuchs et al. | Middle Jurassic (Callovian) | Oxford Clay Formation | United Kingdom | A member of Muensterelloidea. Genus includes new species M. johnjagti. |
| Neotainoceras zhaoi | Sp. nov | Valid | Miao et al. | Permian (Changhsingian) | Dalong Formation | China | A nautiloid. |
| Nodopleuroceras gujiaoense | Sp. nov | Valid | Miao et al. | Permian (Changhsingian) | Dalong Formation | China | A nautiloid. |
| Ordogeisonoceras uppsalaensis | Sp. nov | Valid | Kröger & Aubrechtová | Late Ordovician | Kullsberg Limestone Formation | Sweden | A member of the family Geisonoceratidae. |
| Sepia vandervoorti | Sp. nov | Valid | Košťák, Jagt & Schlögl | Miocene (late Langhian–earliest Serravallian) | Köselerli Formation | Turkey | A species of Sepia. |
| Shanthaiceras | Gen. et sp. nov | Valid | Niko, Sone & Leman | Ordovician | Lower Setul Limestone | Malaysia | A member of Pseudorthocerida. Genus includes new species S. amplum. |
| Sibumasuoceras kilimense | Sp. nov | Valid | Niko, Sone & Leman | Ordovician | Lower Setul Limestone | Malaysia | A member of Pseudorthocerida. |
| Sibumasuoceras scrivenori | Sp. nov | Valid | Niko, Sone & Leman | Ordovician | Lower Setul Limestone | Malaysia | A member of Pseudorthocerida. |
| Tafadnatoceras | Gen. et sp. nov | In press | Ebbestad et al. | Late Ordovician | Upper Tiouririne Formation | Morocco | A member of Orthocerida belonging to the family Stereoplasmoceratidae. The type species is T. tiouririnense. Announced in 2019; the final version of the article naming it is not published yet. |
| Tofangoceras kedahense | Sp. nov | Valid | Niko, Sone & Leman | Ordovician | Lower Setul Limestone | Malaysia | A member of Orthocerida. |
| Tofangoceras rayense | Sp. nov | Valid | Niko, Sone & Leman | Ordovician | Lower Setul Limestone | Malaysia | A member of Orthocerida. |
| Tofangoceras staiti | Sp. nov | Valid | Niko, Sone & Leman | Ordovician | Lower Setul Limestone | Malaysia | A member of Orthocerida. |
| Tyrionella | Gen. et sp. nov | Valid | Fuchs et al. | Late Jurassic (Tithonian) | Altmühltal Formation | Germany | A member of Muensterelloidea. Genus includes new species T. fauseri. |
| Valkyrioceras | Gen. et sp. nov | Valid | Kröger & Aubrechtová | Late Ordovician | Kullsberg Limestone Formation | Sweden | A member of the family Valcouroceratidae. Genus includes new species V. dalecarlia. |
| Wadema tattai | Sp. nov | In press | Ebbestad et al. | Late Ordovician | Upper Ktaoua Formation | Morocco | A member of Actinocerida belonging to the family Wademidae. Announced in 2019; the final version of the article naming it is not published yet. |

## Gastropods
### Research

* A study on the diversity of gastropod larval conch fossil assemblages of ages ranging from the Ordovician to Carboniferous is published online by Dzik (2019).
* A study on the recovery of gastropods in the aftermath of the Cretaceous–Paleogene extinction event, based on data from fossils from the former Ankerpoort-Curfs quarry (Geulhem, the Netherlands), is published online by Vellekoop et al. (2019).
* A probable cyclophoroidean gastropod, possibly a member of the family Cyclophoridae, is described from the Cretaceous amber from Myanmar by Xing et al. (2019), constituting the first confirmed and oldest record of soft-bodied preservation of a snail in Cretaceous amber.
* A study on the nature of the size dimorphism in the Miocene gastropod Persististrombus deperditus, and on the causes of its evolution, is published by Halder & Paira (2019).
* New specimens of Spinucella reimersi are described from the Miocene Gram Clay of Denmark by Schnetler (2019), who also provides an emended description of this species.
* A revision of extant and Neogene members of the genus Antistreptus from the southwestern Atlantic Ocean is published by Pastorino & Griffin (2019).

### New taxa

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
| Acirsa torensis | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | A species of Acirsa. | |
| Acmaea selandica | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | A species of Acmaea. | |
| Actinella fecundaerrata | Nom. nov | Valid | Teixeira et al. | Quaternary | | Madeira | A species of Actinella. | |
| Agaronia almaghribensis | Sp. nov | Valid | Pacaud & Lebrun | Eocene (Lutetian) | | Morocco | A species of Agaronia. | |
| Ageria laxa | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | | |
| Ageria skeldervigensis | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | | |
| Allmonia | Gen. et comb. nov | Valid | Harzhauser & Landau | Oligocene (Rupelian) to Miocene (Tortonian) | | Algeria  Austria  Belgium  Bosnia and Herzegovina  Bulgaria  Czech Republic  France  Germany  Greece  Hungary  India  Iran  Italy  Netherlands  Pakistan  Portugal  Slovakia  Slovenia  Switzerland  Turkey | A member of the family Turritellidae. The type species is "Turritella" cathedralis Brongniart (1823); genus also includes several European Cenozoic species previously placed in Protoma. | |
| Allossospira | Gen. et comb. nov | In press | Ebbestad et al. | Late Ordovician | Upper Ktaoua Formation | Morocco | A member of the family Gosseletinidae belonging to the subfamily Euryzoninae. The type species is "Lophospira" debganensis Horný (1997). Announced in 2019; the final version of the article naming it is not published yet. | |
| Alvania amphitrite | Sp. nov | Valid | Thivaiou, Harzhauser & Koskeridou | Miocene (Aquitanian) | Pentalofos Formation | Greece | A species of Alvania. | |
| Amaea alicae | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | | |
| Amaea stevniensis | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | | |
| Amaurellina ravni | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | | |
| Amaurotoma? multispirata | Sp. nov | Valid | Ketwetsuriya, Cook & Nützel | Permian (Wordian) | Ratburi Group | Thailand | A member of the family Trochonematidae. | |
| Ananias belaensis | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Eotomariidae. | |
| Ananias bashkiriensis | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Eotomariidae. | |
| Anematina indiscreta | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Elasmonematidae. | |
| Aneudaronia | Gen. et sp. nov | Valid | Guzhov | Jurassic | | Russia | A member of the family Stuoraxidae. Genus includes new species A. elegans. | |
| Anomphalus glaucus | Sp. nov | Valid | Mazaev | Early Permian | | Russia | | |
| Apachella rugosa | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Eotomariidae. | |
| Aphera chattica | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A species of Aphera. | |
| Aquitanobursa | Gen. et comb. nov | Valid | Sanders, Merle & Puillandre | Oligocene (Rupelian) to early Pliocene | | Dominican Republic  France  Italy  Pakistan  Venezuela  United States? | A member of the family Bursidae. The type species is "Ranella" grateloupi d'Orbigny (1852); genus also includes "Bursa" amphitrites Maury (1917), "Apollon" inaequicrenatus Cossmann & Peyrot (1924), "Ranella" morrisi d'Archiac & Haime (1853), "Ranella" tuberosa Grateloup (1833) and possibly also "Bursa (Bufonariella)" chipolana Schmelz (1997). | |
| Archaeocyclotus | Gen. et sp. nov | Valid | Asato & Hirano in Hirano et al. | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Cyclophoridae. The type species is A. plicatula. | Archaeocyclotus plicatula |
| Archimediella carpathica | Sp. nov | Valid | Harzhauser & Landau | Middle Miocene | | Austria  Bosnia and Herzegovina  Hungary  Poland  Romania  Slovakia | A member of the family Turritellidae. | |
| Arene jakobseni | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | A species of Arene. | |
| Argentisioliella | Gen. et sp. nov | Valid | Miquel | Early Pliocene | Irene Formation | Argentina | A member of the family Cochliopidae. Genus includes new species A. pardignasi. | |
| Arribazona seleukensis | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Orthonematidae. | |
| Ascheria salina | Sp. nov | Valid | Kiel et al. | Early Oligocene | Talara Basin | Peru | A member of the family Hokkaidoconchidae. | |
| Ataphrus knoesensis | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | | |
| Athleta benoisti | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A species of Athleta. | |
| Athleta confusus | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A species of Athleta. | |
| Athleta maculosus | Sp. nov | Valid | Lozouet | Miocene | | France | A species of Athleta. | |
| Athleta memoirae | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A species of Athleta. | |
| Athleta peyreirensis | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A species of Athleta. | |
| Attiliosa gallica | Sp. nov | Valid | Landau et al. | Miocene (Tortonian) | | France | A species of Attiliosa. | |
| Attiliosa pouweri | Sp. nov | Valid | Landau et al. | Miocene (Tortonian) | | France | A species of Attiliosa. | |
| Auritoma | Gen. et sp. nov | Valid | Szabó et al. | Jurassic | | Italy | Genus includes new species A. lenticula. | |
| Bandelzyga | Gen. et sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Pseudozygopleuridae. Genus includes new species B. elegans. | |
| Bathrotomaria jakobseni | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | | |
| Bayania falconneti | Sp. nov | Valid | Pacaud | Paleogene | | France | | |
| Baylea longispira | Sp. nov | Valid | Mazaev | Permian | | China  Russia | A member of the family Lophospiridae. | |
| Bellazona acuta | Sp. nov | Valid | Mazaev | Early Permian | | Russia | | |
| Bellerophon shakhtauensis | Sp. nov | Valid | Mazaev | Early Permian | | Russia | | |
| Birgella burchi | Sp. nov | Valid | Naranjo-García & Aguillón in Vega et al. | Late Cretaceous (late Campanian) | Cerro del Pueblo Formation | Mexico | A member of the family Hydrobiidae. | |
| Bleytonella saalensis | Sp. nov | Valid | Gründel, Keupp & Lang | Late Jurassic (Kimmeridgian) | | Germany | A member of the family Pickworthiidae. | |
| Bobellis | Gen. et sp. nov | Valid | Peel | Early Silurian | Samuelsen Høj Formation | Greenland | A member of Euomphaloidea belonging to the family Pycnomphalidae. The type species is B. oliveri. | |
| Bocourtia (Kuschelenia?) bonariensis | Sp. nov | Valid | Miquel | Early Pliocene | Irene Formation | Argentina | A member of the family Bulimulidae. | |
| Bolicharewia | Gen. et sp. et comb. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Anomphalidae. Genus includes new species B. edita, as well as "Anomphalus" straparoliformis Mazaev (1997). | |
| Bonellitia cryptica | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A species of Bonellitia. | |
| Bonellitia peyroti | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A species of Bonellitia. | |
| Boreomica costaspiralis | Sp. nov | Valid | Gründel, Keupp & Lang | Late Jurassic (Kimmeridgian) | | Germany | A member of Rissooidea belonging to the family Palaeorissoinidae. | |
| Busambrella | Gen. et sp. nov | Valid | Szabó et al. | Jurassic | | Italy | Genus includes new species B. fasciata. | |
| Buvignieria convexa | Sp. nov | Valid | Gründel, Keupp & Lang | Late Jurassic (Kimmeridgian) | | Germany | A member of Rissooidea belonging to the family Palaeorissoinidae. | |
| Buvignieria racitana | Sp. nov | Valid | Gründel, Keupp & Lang | Late Jurassic (Kimmeridgian) | | Germany | A member of Rissooidea belonging to the family Palaeorissoinidae. | |
| Callispira taosiformis | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Sinuspiridae. | |
| Calyptraea baldii | Sp. nov | Valid | Vicián, Kovács & Stein | Late Oligocene – early Miocene | | Hungary | A species of Calyptraea. | |
| Ceratia rodvigensis | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | A species of Ceratia. | |
| Cerion uva gouldi | Subsp. nov | Valid | Harasewych | Pleistocene | | Aruba | A subspecies of Cerion uva. | |
| Cerithiella selandica | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | A species of Cerithiella. | |
| Cerithiopsis restemlongis | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | A species of Cerithiopsis. | |
| Chartronella belaensis | Sp. nov | Valid | Szabó & Jaitly | Middle Jurassic (Callovian) | Chari Formation | India | A member of the family Paraturbinidae. | |
| Chelotia pervicina | Sp. nov | Valid | Berezovsky & Pacaud | Middle Eocene | | Ukraine | A member of the family Pleurotomariidae. | |
| Chlorozyga asiatica | Sp. nov | Valid | Ketwetsuriya, Cook & Nützel | Permian (Wordian) | Ratburi Group | Thailand | A member of the family Imoglobidae. | |
| Chriskingia | Gen. et comb. nov | Valid | Janssen & Wilson | Miocene | | Dominican Republic  Trinidad and Tobago | A member of the family Atlantidae; a new genus for "Atlanta" rotundata Gabb (1873). | |
| Clavatula danuvii | Sp. nov | Valid | Vicián, Kovács & Stein | Late Oligocene – early Miocene | | Hungary | A species of Clavatula. | |
| Clavilithes tamdakhtensis | Nom. nov | Valid | Pacaud & Lebrun | Eocene (Lutetian) | | Morocco | A species of Clavilithes. | |
| Claviscala minor | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | | |
| Cleopatra adami | Nom. nov | Valid | Neiber & Glaubrecht | Early Pleistocene | Kaiso Series | Uganda | A species of Cleopatra; a replacement name for Viviparus cylindricus Adam (1957). | |
| Clithon (Pictoneritina) coeuvrensis | Sp. nov | Valid | Vrinat | Eocene (Ypresian) | | France | A species of Clithon. | |
| Clithon (Pictoneritina) occultatus | Sp. nov | Valid | Vrinat | Eocene (Ypresian) | | France | A species of Clithon. | |
| Clithon (Pictoneritina) tigrinus | Sp. nov | Valid | Vrinat | Eocene (Ypresian) | | France | A species of Clithon. | |
| Cochlis odovychenorum | Sp. nov | Valid | Pedriali, Sosso & Dell'Angelo | Miocene | | Ukraine | A member of the family Naticidae. | |
| Cochlis ukrainensis | Sp. nov | Valid | Pedriali, Sosso & Dell'Angelo | Miocene | | Ukraine | A member of the family Naticidae. | |
| Coninoda strekwera | Sp. nov | Valid | Gründel, Keupp & Lang | Late Jurassic (Kimmeridgian) | | Germany | A member of the family Eustomatidae. | |
| Coniscala umbilica | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | | |
| Contortia grateloupi | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A member of the family Cancellariidae. | |
| Contortia intermedia | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A member of the family Cancellariidae. | |
| Contortia zitae | Sp. nov | Valid | Vicián, Kovács & Stein | Late Oligocene – early Miocene | | Hungary | A member of the family Cancellariidae. | |
| Coptostylus harzhauseri | Nom. nov | Valid | Pacaud | Paleogene | | France | | |
| Coroniopsis mortoni | Sp. nov | Valid | Tracey & Craig in Tracey, Craig & Gain | Eocene (Lutetian) | Selsey Formation | United Kingdom | A member of the family Turridae. | |
| Cosmocerithium veliger | Sp. nov | Valid | Guzhov | Late Jurassic | | Russia | A member of the family Cerithiopsidae. | |
| Cossmannina alfischeri | Sp. nov | Valid | Foster et al. | Early Triassic | | China | | |
| Cranopsis cretacea | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | A species of Cranopsis. | |
| Cristalloella (Wonwalica) permica | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Tofanellidae. | |
| Cryptaulax? parvum | Sp. nov | Valid | Gründel, Keupp & Lang | Late Jurassic (Kimmeridgian) | | Germany | A member of Cerithioidea belonging to the family Cryptaulacidae. | |
| Cryptaulax? triangulare | Sp. nov | Valid | Gründel, Keupp & Lang | Late Jurassic (Kimmeridgian) | | Germany | A member of Cerithioidea belonging to the family Cryptaulacidae. | |
| Cryptoptyxis rarenodosa | Sp. nov | Valid | Gründel, Keupp & Lang | Late Jurassic (Kimmeridgian) | | Germany | A member of the family Maoraxidae. | |
| Cylichna stevniensis | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | A species of Cylichna. | |
| Cyllene satoi | Sp. nov | Valid | Amano | Late Pliocene | Tentokuji Formation | Japan | A species of Cyllene. | |
| Cypraeorbis nadaii | Sp. nov | Valid | Vicián, Kovács & Stein | Late Oligocene – early Miocene | | Hungary | A cowry. | |
| Cystiscus pseudobrevis | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A species of Cystiscus. | |
| Dalliella elisae | Sp. nov | Valid | Pacaud | Paleogene | | France | | |
| Denticulofusus | Gen. et comb. nov | Valid | Vermeij & Pacaud | Eocene (Lutetian and Priabonian) | | France | A member of the family Columbariidae. The type species is "Fusus" gothicus Deshayes (1834); genus also includes "Coluzea" cavelieri Gain & Le Renard (2017) and "Coluzea" monicae Belliard, Gain & Le Renard (2017). | |
| Dentimargo salvani | Sp. nov | Valid | Pacaud & Lebrun | Eocene (Lutetian) | | Morocco | A species of Dentimargo. | |
| Dictyotomaria balabanovi | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Phymatopleuridae. | |
| Discula cameroni | Sp. nov | Valid | Teixeira et al. | Quaternary | | Madeira | A species of Discula. | |
| Discula polymorpha docaensis | Subsp. nov | Valid | Teixeira et al. | Quaternary | | Madeira | | |
| Doggerostra riedeli affinis | Subsp. nov | Valid | Guzhov | Late Jurassic | | Russia | A member of Heterobranchia of uncertain phylogenetic placement. | |
| Dolicholatirus lorenzi | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | A species of Dolicholatirus. | |
| Donaldina erwini | Sp. nov | Valid | Foster et al. | Early Triassic | | China | | |
| Dragonia | Gen. et 2 sp. nov | Valid | Guzhov | Late Jurassic | | Russia | A member of the family Cerithiopsidae. Genus includes new species D. minuta and D. longa. | |
| Eirlysia reticulatiformis | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Phymatopleuridae. | |
| Elymicyclus | Gen. et 4 sp. nov | Valid | Szabó et al. | Jurassic | | Italy | Genus includes new species E. alternatus, E. ietumensis, E. martae and E. garibaldii. | |
| Emarginula acutidens | Sp. nov | Valid | Szabó et al. | Jurassic | | Italy | A species of Emarginula. | |
| Emarginula burgioi | Sp. nov | Valid | Szabó et al. | Jurassic | | Italy | A species of Emarginula. | |
| Engina brunettii | Sp. nov | Valid | Landau, Ceulemans & Van Dingenen | Miocene (Tortonian) | | France | A species of Engina. | |
| Eoplatyzona ratchaburiensis | Sp. nov | Valid | Ketwetsuriya, Cook & Nützel | Permian (Wordian) | Ratburi Group | Thailand | A member of the family Gosseletinidae. | |
| Eopleurotoma bella | Sp. nov | Valid | Tracey & Craig in Tracey, Craig & Gain | Eocene (Lutetian) | | France | A species of Eopleurotoma. | |
| Eopleurotoma bicincta | Sp. nov | Valid | Tracey & Craig in Tracey, Craig & Gain | Eocene (Lutetian) | | France | A species of Eopleurotoma. | |
| Eopleurotoma boxleyi | Sp. nov | Valid | Tracey & Craig in Tracey, Craig & Gain | Eocene (Lutetian) | | France | A species of Eopleurotoma. | |
| Eopleurotoma christinae | Sp. nov | Valid | Tracey & Craig in Tracey, Craig & Gain | Eocene (Lutetian) | | France | A species of Eopleurotoma. | |
| Eopleurotoma hastula | Sp. nov | Valid | Tracey & Craig in Tracey, Craig & Gain | Eocene (Lutetian) | | France | A species of Eopleurotoma. | |
| Eopleurotoma scitula | Sp. nov | Valid | Tracey & Craig in Tracey, Craig & Gain | Eocene (Lutetian) | | France | A species of Eopleurotoma. | |
| Eopleurotoma vauvillensis | Sp. nov | Valid | Tracey & Craig in Tracey, Craig & Gain | Eocene (Lutetian) | | France | A species of Eopleurotoma. | |
| Eovoluta adegokei | Nom. nov | Valid | Pacaud & Lebrun | Eocene (Lutetian) | | Morocco | | |
| Epalxis symondsi | Sp. nov | Valid | Tracey & Craig in Tracey, Craig & Gain | Eocene (Lutetian) | | France | A species of Epalxis. | |
| Epalxis toddi | Sp. nov | Valid | Tracey & Craig in Tracey, Craig & Gain | Eocene (Lutetian) | | France | A species of Epalxis. | |
| Episcomitra silvae | Sp. nov | Valid | Landau, Ceulemans & Van Dingenen | Miocene (Tortonian) | | France | A species of Episcomitra. | |
| Euthria presselierensis | Sp. nov | Valid | Landau, Ceulemans & Van Dingenen | Miocene (Tortonian) | | France | A species of Euthria. | |
| Exelissa indiana | Sp. nov | Valid | Szabó & Jaitly | Middle Jurassic (Callovian) | Gadhada Formation | India | A member of the family Cryptaulacidae. | |
| Epalxis? rosenkrantzi | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | Transferred to the genus Fusulculus by Pacaud (2020), who coined a replacement name Fusulculus hanseni. | |
| Epetrium skeldervigensis | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | | |
| Epitonium (Epitonium) zhuoi | Sp. nov | Valid | Yu, Wang & Jarzembowski | Late Cretaceous (Cenomanian | Burmese amber | Myanmar | A gastropod of uncertain phylogenetic placement. Originally described as a species of Epitonium; Neubauer et al. (2019) transferred this species to the pupinid genus Pseudopomatias. | |
| Epitonium (Papyriscala) lyui | Sp. nov | Valid | Yu, Wang & Jarzembowski | Late Cretaceous (Cenomanian | Burmese amber | Myanmar | A gastropod of uncertain phylogenetic placement. Originally described as a species of Epitonium; Neubauer et al. (2019) transferred this species to the pupinid genus Pseudopomatias. | |
| Euconospira skuini | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Phymatopleuridae. | |
| Eucyclomphalus? marenostrum | Sp. nov | Valid | Szabó et al. | Jurassic | | Italy | | |
| Eucycloscala gracilicostatus | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | | |
| Euspira jhuraensis | Sp. nov | Valid | Das et al. | Uncertain; Late Jurassic or Miocene | | India | A species of Euspira. | |
| Euspira lakhaparensis | Sp. nov | Valid | Das et al. | Uncertain; Late Jurassic or Miocene | | India | A species of Euspira. | |
| Euspira sirenkoi | Sp. nov | Valid | Pedriali, Sosso & Dell'Angelo | Miocene | | Ukraine | A species of Euspira. | |
| Euthema hesoana | Sp. nov | Valid | Asato & Hirano in Hirano et al. | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Diplommatinidae. | Euthema hesoana |
| Falsobuvigna | Gen. et sp. nov | Valid | Gründel, Keupp & Lang | Late Jurassic (Kimmeridgian) | | Germany | A member of Rissooidea belonging to the new family Falsobuvignidae. The type species is F. peregrina. | |
| Fischeriella sicula | Sp. nov | Valid | Szabó et al. | Jurassic | | Italy | | |
| Fissurella? stantoni | Sp. nov | Valid | Powell & Geiger | Miocene | Topanga Canyon Formation | United States ( California) | A member of the family Fissurellidae. | |
| Fusimorio salbriacensis | Sp. nov | Valid | Lozouet | Miocene | | France | A member of the family Cancellariidae. | |
| Fusinus schnetleri | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | A species of Fusinus. | |
| Garviea craccoi | Sp. nov | Valid | Zamberlan & Checchi | Eocene (late Ypresian/early Lutetian) | | Italy | A member of the family Cypraeidae belonging to the subfamily Gisortiinae. | |
| Gemmula garviei | Sp. nov | Valid | Tracey & Craig in Tracey, Craig & Gain | Eocene (Lutetian) | | France | A species of Gemmula. | |
| Gemmula tuckeri | Sp. nov | Valid | Tracey & Craig in Tracey, Craig & Gain | Eocene (Lutetian) | | France | A species of Gemmula. | |
| Gemmulopsis | Gen. et sp. nov | Valid | Tracey & Craig in Tracey, Craig & Gain | Eocene (Lutetian) | | France | A member of the family Turridae. The type species is G. nigellensis. | |
| Gibberula amurakucensis | Sp. nov | Valid | Pacaud & Lebrun | Eocene (Lutetian) | | Morocco | A species of Gibberula. | |
| Gibberula bezoyensis | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A species of Gibberula. | |
| Gibberula ligeriana | Sp. nov | Valid | Landau, Ceulemans & Van Dingenen | Miocene (Tortonian) | | France | A species of Gibberula. | |
| Gibberula pseudoaquitanica | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A species of Gibberula. | |
| Gibberula subovulatoides | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A species of Gibberula. | |
| Girtyspira oblonga | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Meekospiridae. | |
| Globodoma magna | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Gosseletinidae. Originally described as a species of Globodoma, but subsequently transferred to the genus Nemaspira. | |
| Goniasma gerasimovi | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Goniasmatidae. | |
| Goniobasis unilirata | Sp. nov | Valid | Naranjo-García & Aguillón in Vega et al. | Late Cretaceous (late Campanian) | Cerro del Pueblo Formation | Mexico | A member of the family Pleuroceridae. | |
| Gymnocerithium? convexoconcavum | Sp. nov | Valid | Gründel, Keupp & Lang | Late Jurassic (Kimmeridgian) | | Germany | Originally described as a member of Campaniloidea belonging to the family Gymnocerithiidae and tentatively assigned to the genus Gymnocerithium; subsequently transferred to the superfamily Cerithioidea and to the genus Neuburgensia by Gründel & Nützel (2024). |
| Gyrodes mahalanobisi | Sp. nov | Valid | Das et al. | Uncertain; Late Jurassic or Miocene | | India | A member of the family Naticidae. | |
| Haitia taylori | Sp. nov | Valid | Naranjo-García & Aguillón in Vega et al. | Late Cretaceous (late Campanian) | Cerro del Pueblo Formation | Mexico | A member of the family Physidae. | |
| Harmatia tokodensis | Sp. nov | Valid | Kovács & Vicián | Eocene | | Hungary | A member of the family Muricidae. | |
| Hemicerithium perrettai | Sp. nov | Valid | Pacaud | Eocene | | United Kingdom | | |
| Hesperiella cyrtocostata | Sp. nov | Valid | Ketwetsuriya, Cook & Nützel | Permian (Wordian) | Ratburi Group | Thailand | A member of the family Porcelliidae. | |
| Heteronatica | Gen. et sp. nov | Valid | Guzhov | Jurassic | | Russia | A member of the family Cornirostridae. Genus includes new species H. globosa. | |
| Hinea gaellae | Sp. nov | Valid | Pacaud | Paleogene | | France | A species of Hinea. | |
| Hirsuticyclus | Gen. et sp. nov | Valid | Neubauer, Xing & Jochum | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Cyclophoridae. The type species is H. electrum. | |
| Holospira thompsoni | Sp. nov | Valid | Naranjo-García & Aguillón in Vega et al. | Late Cretaceous (late Campanian) | Cerro del Pueblo Formation | Mexico | A species of Holospira. | |
| Homalopoma acaste | Sp. nov | Valid | Thivaiou, Harzhauser & Koskeridou | Miocene (Aquitanian) | Pentalofos Formation | Greece | A species of Homalopoma. | |
| Hydrobia galatoniana | Sp. nov | Valid | Esu & Girotti | Oligocene (Chattian) | Galatone Formation | Italy | A species of Hydrobia sensu lato. | |
| Hydrobia ionica | Sp. nov | Valid | Esu & Girotti | Oligocene (Chattian) | Galatone Formation | Italy | A species of Hydrobia sensu lato. | |
| Hyphantozyga? khaophrikensis | Sp. nov | Valid | Ketwetsuriya, Cook & Nützel | Permian (Wordian) | Ratburi Group | Thailand | A member of the family Pseudozygopleuridae. | |
| Involuta coxi | Sp. nov | Valid | Halder & Das | Eocene | | India | A volute. | |
| Jponsia aryanamensis | Sp. nov | Valid | Pacaud | | | Iran | | |
| Jponsia yesimae | Sp. nov | Valid | Pacaud | Paleogene | | Turkey | | |
| Jumaramaria | Gen. et sp. nov | Valid | Szabó & Jaitly | Middle Jurassic (Bathonian) | Jhurio Formation | India | A possible member of the family Pleurotomariidae. The type species is J. jumaraensis. | |
| Jurassiscala | Gen. et 2 sp. nov | Valid | Szabó et al. | Jurassic | | Italy | Genus includes new species J. sturanii and possibly also J? tenuiretis. | |
| Keilostoma nautagarona | Sp. nov | Valid | Pacaud | Paleogene | | France | | |
| Laevitomaria babalusciae | Sp. nov | Valid | Szabó et al. | Jurassic | | Italy | | |
| Lagocheilus cretaspira | Sp. nov | Valid | Asato & Hirano in Hirano et al. | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A species of Lagocheilus. | Lagocheilus cretaspira |
| Lagocheilus electrospira | Sp. nov | Valid | Asato & Hirano in Hirano et al. | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | Originally described as a species of Lagocheilus. Transferred to the genus Eotrichophorus by Balashov (2020). | Lagocheilus electrospira |
| Leiostyla castanheiraensis | Sp. nov | Valid | Teixeira et al. | Quaternary | | Madeira | A species of Leiostyla. | |
| Leiostyla cooki | Sp. nov | Valid | Teixeira et al. | Quaternary | | Madeira | A species of Leiostyla. | |
| Leiostyla desertaensis | Sp. nov | Valid | Teixeira et al. | Quaternary | | Madeira | A species of Leiostyla. | |
| Leiostyla simulans | Sp. nov | Valid | Teixeira et al. | Quaternary | | Madeira | A species of Leiostyla. | |
| Leptaxis groviana antiqua | Subsp. nov | Valid | Teixeira et al. | Quaternary | | Madeira | A species of Leptaxis. | |
| Leptaxis isambertoi | Sp. nov | Valid | Teixeira et al. | Quaternary | | Madeira | A species of Leptaxis. | |
| Levizygopleura composita | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Pseudozygopleuridae. | |
| Levizygopleura magna | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Pseudozygopleuridae. | |
| Littoraria (Littorinopsis) massicardi | Sp. nov | Valid | Pacaud | Paleogene | | France | A species of Littoraria. | |
| Lophospira latilabra | Sp. nov | In press | Ebbestad et al. | Late Ordovician | Upper Ktaoua Formation | Morocco | A member of the family Lophospiridae. Announced in 2019; the final version of the article naming it is not published yet. | |
| Lyria peyrehoradensis | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A species of Lyria. | |
| Maestratia | Gen. et comb. nov | Valid | Dolin & Aguerre | Oligocene (Rupelian) | | France | A member of the family Cypraeidae. The type species is "Pustularia (Conocypraea)" rugifera Schilder (1927). | |
| Masaevia | Gen. et sp. nov | Valid | Guzhov | Jurassic | | Russia | A member of Heterobranchia of uncertain phylogenetic placement. Genus includes new species M. sinistra. | |
| Mathilda dania | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | A species of Mathilda. | |
| Melanopsis neubaueri | Sp. nov | Valid | Pacaud | Paleogene | | France | A species of Melanopsis. | |
| Melarhaphe perminima | Sp. nov | Valid | Pacaud | Paleogene | | France | A species of Melarhaphe. | |
| Melarhaphe vanhyftei | Sp. nov | Valid | Pacaud | Paleogene | | France | A species of Melarhaphe. | |
| Merica admirabilis | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A species of Merica. | |
| Merica estotiensis | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A species of Merica. | |
| Merica mutabilis | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A species of Merica. | |
| Mesalia bohnhavasae | Sp. nov | Valid | Harzhauser & Landau | Middle Miocene | | Hungary | A species of Mesalia. | |
| Mesalia danica | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | A species of Mesalia. | |
| Mesalia sovisi | Sp. nov | Valid | Harzhauser & Landau | Middle Miocene | | Austria  Czech Republic | A species of Mesalia. | |
| Mesalia stryriaca | Sp. nov | Valid | Harzhauser & Landau | Middle Miocene | | Austria | A species of Mesalia. | |
| Mitrella clava | Sp. nov | Valid | Landau, Ceulemans & Van Dingenen | Miocene (Tortonian) | | France | A species of Mitrella. | |
| Mitrella ligeriana | Sp. nov | Valid | Landau, Ceulemans & Van Dingenen | Miocene (Tortonian) | | France | A species of Mitrella. | |
| Mitrella miopicta | Sp. nov | Valid | Landau, Ceulemans & Van Dingenen | Miocene (Tortonian) | | France | A species of Mitrella. | |
| Mitrella pseudoinedita | Sp. nov | Valid | Landau, Ceulemans & Van Dingenen | Miocene (Tortonian) | | France | A species of Mitrella. | |
| Mitrella pseudoblonga | Sp. nov | Valid | Landau, Ceulemans & Van Dingenen | Miocene (Tortonian) | | France | A species of Mitrella. | |
| Mitrella pseudoturgidula | Sp. nov | Valid | Landau, Ceulemans & Van Dingenen | Miocene (Tortonian) | | France | A species of Mitrella. | |
| Monimirus | Gen. et sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Stuoraxidae. Genus includes new species M. bonus. | |
| Monodonta joetsuensis | Sp. nov | Valid | Amano | Late Pliocene | Nadachi Formation | Japan | A species of Monodonta. | |
| Murexsul primigenius | Sp. nov | Valid | Merle & Pacaud | Eocene (Priabonian) | | France | A species of Murexsul. | |
| Neverita amerrukensis | Nom. nov | Valid | Pacaud & Lebrun | Eocene (Lutetian) | | Morocco | A species of Neverita. | |
| Nipteraxis parilis | Sp. nov | Valid | Pacaud & Lebrun | Eocene (Lutetian) | | Morocco | | |
| Novlepatella uralensis | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Daminilidae. | |
| Ocinebrina houarti | Sp. nov | Valid | Landau et al. | Miocene (Tortonian) | | France | A species of Ocinebrina. | |
| Olssonia | Gen. et comb. nov | Valid | Sanders, Merle & Puillandre | Eocene to early Miocene | Chira Formation Talara Formation | Peru | A member of the family Bursidae. The type species is "Bursa" chira Olsson (1930); genus also includes Bursa chira var. yasila Olsson (1930), raised to the rank of a separate species Olssonia yasila. | |
| Opaliopsis carlsbergi | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | | |
| Orecopia inopinata | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Omphalotrochidae. | |
| Orthonema conspicuum | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Orthonematidae. | |
| Orthonema nonnullum | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Orthonematidae. | |
| Orthonema perspicuum | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Orthonematidae. | |
| Orthonema repandum | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Orthonematidae. | |
| Orthonychia korotkovae | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Platyceratidae. | |
| Palaeoloxotoma | Nom. nov | Valid | Hansen | Early-Middle Jurassic to Late Cretaceous (Maastrichtian) | | Denmark  France  Jamaica  New Zealand  Poland | A member of the family Fissurellidae belonging to the subfamily Emarginulinae; a replacement name for Loxotoma Fischer (1885). | |
| Palaeostylus confragosus | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Palaeostylidae. | |
| Palaeostylus nervosus | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Palaeostylidae. | |
| Payraudeautia ermesi | Sp. nov | Valid | Pedriali, Sosso & Dell'Angelo | Miocene | | Ukraine | A species of Payraudeautia. | |
| Payraudeautia sabrinae | Sp. nov | Valid | Pedriali, Sosso & Dell'Angelo | Miocene | | Ukraine | A species of Payraudeautia. | |
| Payraudeautia varovtsiana | Sp. nov | Valid | Pedriali, Sosso & Dell'Angelo | Miocene | | Ukraine | A species of Payraudeautia. | |
| Paziella gallica | Sp. nov | Valid | Landau et al. | Miocene (Tortonian) | | France | A species of Paziella. | |
| Paziella gracilenta | Sp. nov | Valid | Landau et al. | Miocene (Tortonian) | | France | A species of Paziella. | |
| Paziella modesta | Sp. nov | Valid | Vicián, Kovács & Stein | Late Oligocene – early Miocene | | Hungary | A species of Paziella. | |
| Paziella parveenae | Sp. nov | Valid | Merle & Pacaud | Eocene (Ypresian) | | Pakistan | A species of Paziella. | |
| Paziella zsoldosi | Sp. nov | Valid | Kovács & Vicián | Eocene | | Hungary | A species of Paziella. | |
| Perakella | Gen. et 2 sp. nov | Valid | Mazaev | Permian | | Malaysia  Russia | Genus includes new species P. shakhtauensis and P. batteni. | |
| Peruvispira uralensis | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Eotomariidae. | |
| Phragmolites lissoni | Sp. nov | Valid | Ebbestad & Gutiérrez-Marco | Ordovician (Sandbian) | Calapuja Formation | Peru | | |
| Pictavia lactera | Sp. nov | Valid | Gründel, Keupp & Lang | Late Jurassic (Kimmeridgian) | | Germany | A member of the family Ampullinidae. | |
| Pisania redoniensis | Sp. nov | Valid | Landau, Ceulemans & Van Dingenen | Miocene (Tortonian) | | France | A species of Pisania. | |
| Planiturbo lerensis | Sp. nov | Valid | Szabó & Jaitly | Middle Jurassic (Callovian) | Chari Formation | India | A member of the family Metriomphalidae. | |
| Platyceras sagum | Sp. nov | Valid | Mazaev | Early Permian | | Russia | | |
| Platyzona shikhanensis | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Pithodeidae. | |
| Pleurocera gigantica | Sp. nov | Valid | Naranjo-García & Aguillón in Vega et al. | Paleocene | Las Encinas Formation | Mexico | A species of Pleurocera. | |
| Plocezyga boikoi | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Pseudozygopleuridae. | |
| Plocezyga convexa | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Pseudozygopleuridae. | |
| Plocezyga minuta | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Pseudozygopleuridae. | |
| Plocezyga venusta | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Pseudozygopleuridae. | |
| Polygona substrigosa | Nom. nov | Valid | Landau, Ceulemans & Van Dingenen | Miocene (Tortonian) | | France | A species of Polygona; a replacement name for Fusus strigosus Millet (1865). | |
| Ponticypraea | Gen. et sp. nov | Valid | Fehse et al. | Late Eocene | | Australia | A member of the family Cypraeidae. Genus includes new species P. egregia. | |
| Procerithium? inaequetuberculata | Sp. nov | Valid | Ketwetsuriya, Cook & Nützel | Permian (Wordian) | Ratburi Group | Thailand | A member of the family Procerithiidae. | |
| Propeucyclus | Gen. et 3 sp. nov | Valid | Szabó et al. | Jurassic | | Italy | Genus includes new species P. sicanus, P. obesus and possibly also P? semireticulatus. | |
| Provalvata maior | Sp. nov | Valid | Cataldo et al. | Early Cretaceous (Barremian) | Huitrín Formation | Argentina | | |
| Provalvata minor | Sp. nov | Valid | Cataldo et al. | Early Cretaceous (Barremian) | Huitrín Formation | Argentina | | |
| Provanna pelada | Sp. nov | Valid | Kiel et al. | Early Oligocene | Talara Basin | Peru | A species of Provanna. | |
| Pseudocochlespira transversa | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | | |
| Pseudolivella inadspecta | Sp. nov | Valid | Pacaud & Lebrun | Eocene (Lutetian) | | Morocco | | |
| Pseudonebularia sceauxensis | Sp. nov | Valid | Landau, Ceulemans & Van Dingenen | Miocene (Tortonian) | | France | A species of Pseudonebularia. | |
| Pseudotoma danica | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | | |
| Pseudozygopleura applicata | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Pseudozygopleuridae. | |
| Ptychidia austrorotundata | Nom. nov | Valid | Harzhauser & Landau | Early Miocene | | Austria  Slovakia | A member of the family Turritellidae; a replacement name for Turritella turris rotundata Schaffer (1912). | |
| Ptychidia erynella | Sp. nov | Valid | Harzhauser & Landau | Early and middle Miocene | | Austria  Czech Republic  Hungary | A member of the family Turritellidae. | |
| Pusia brebioni | Sp. nov | Valid | Landau, Ceulemans & Van Dingenen | Miocene (Tortonian) | | France | A species of Pusia. | |
| Pusia pseudoplicatula | Sp. nov | Valid | Landau, Ceulemans & Van Dingenen | Miocene (Tortonian) | | France | A species of Pusia. | |
| Pusia renauleauensis | Sp. nov | Valid | Landau, Ceulemans & Van Dingenen | Miocene (Tortonian) | | France | A species of Pusia. | |
| Pusia sublaevis | Sp. nov | Valid | Landau, Ceulemans & Van Dingenen | Miocene (Tortonian) | | France | A species of Pusia. | |
| Pyramistomia aliakmoni | Sp. nov | Valid | Thivaiou, Harzhauser & Koskeridou | Miocene (Aquitanian) | Pentalofos Formation | Greece | A member of the family Pyramidellidae belonging to the subfamily Odostomiinae. | |
| Pyrazopsis mexcala | Sp. nov | Valid | Pacaud | | | Mexico | | |
| Pyrgotrochus vorosi | Sp. nov | Valid | Szabó et al. | Jurassic | | Italy | | |
| Pyropelta seca | Sp. nov | Valid | Kiel et al. | Early Oligocene | Talara Basin | Peru | A species of Pyropelta. | |
| Radvanospira | Gen. et comb. et sp. nov | In press | Ebbestad et al. | Late Ordovician | | Czech Republic  Morocco  Spain | A member of the family Platyceratidae. The type species is "Naticopsis" antiquata Barrande in Perner (1903); genus also includes new species R. baniensis. Announced in 2019; the final version of the article naming it is not published yet. | |
| Ramusatomaria | Gen. et sp. nov | Valid | Szabó et al. | Jurassic | | Italy | Genus includes new species R. nuda. | |
| Retimusina | Gen. et 2 sp. nov | Valid | Szabó et al. | Jurassic | | Italy | Genus includes new species R. poseidoni and possibly also R? tritoni. | |
| Retispira khaophrikensis | Sp. nov | Valid | Ketwetsuriya, Cook & Nützel | Permian (Wordian) | Ratburi Group | Thailand | A member of the family Bellerophontidae belonging to the subfamily Knightitinae. | |
| Rimella aldjazairensis | Sp. nov | Valid | Pacaud | Eocene | | Algeria | A species of Rimella. | |
| Rissoina albaresensis | Sp. nov | Valid | Pacaud | Paleogene | | France | A species of Rissoina. | |
| Romanekia | Gen. et comb. nov | Valid | Dolin & Aguerre | Eocene (Lutetian) | | France | A member of the family Cypraeidae. The type species is "Proadusta" francki Gain, Le Renard & Belliard (2012). | |
| Rotfanella gerasimovi | Sp. nov | Valid | Guzhov | Jurassic | | Russia | A member of the family Cimidae. | |
| Rotfanella reticulata | Sp. nov | Valid | Guzhov | Jurassic | | Russia | A member of the family Cimidae. | |
| Rugosacyclus | Gen. et comb. nov | Valid | Gründel, Keupp & Lang | Late Jurassic (Kimmeridgian) | | Germany | A member of Caenogastropoda of uncertain phylogenetic placement. The type species is "Spirocyclina" rugosa Brösamlen (1909). | |
| Saalensia | Gen. et sp. nov | Valid | Gründel, Keupp & Lang | Late Jurassic (Kimmeridgian) | | Germany | A member of Sorbeoconcha belonging to the family Brachytrematidae. The type species is S. birugata. | |
| Sallya bimaris | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Pseudophoridae. | |
| Sallya indigena | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Pseudophoridae. | |
| Scelidotoma aldersoni | Sp. nov | Valid | Powell & Geiger | Miocene | Topanga Canyon Formation | United States ( California) | A species of Scelidotoma. | |
| Schistoloma electrothauma | Sp. nov | Valid | Asato & Hirano in Hirano et al. | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Pupinidae. | Schistoloma electrothauma |
| Seleukella | Gen. et sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Palaeozygopleuridae. Genus includes new species S. costata. | |
| Semisulcospira (Biwamelania) gamoensis | Sp. nov | Valid | Matsuoka & Miura | Early Pleistocene | Gamo Formation | Japan | A species of Semisulcospira. | |
| Semisulcospira (Biwamelania) nojirina | Sp. nov | Valid | Matsuoka & Miura | Late Pliocene | Ayama Formation Koka Formation | Japan | A species of Semisulcospira. | |
| Semisulcospira (Biwamelania) reticulataformis | Sp. nov | Valid | Matsuoka & Miura | Late Pliocene | Ayama Formation | Japan | A species of Semisulcospira. | |
| Semisulcospira (Biwamelania) tagaensis | Sp. nov | Valid | Matsuoka & Miura | Early Pleistocene | Gamo Formation | Japan | A species of Semisulcospira. | |
| Shurovites robustus | Sp. nov | Valid | Gründel, Keupp & Lang | Late Jurassic (Kimmeridgian) | | Germany | A member of Cerithioidea belonging to the family Cryptaulacidae. | |
| Shwedagonia korolukae | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Phymatopleuridae. | |
| Shwedagonia pagoda | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Phymatopleuridae. | |
| Sigmesalia ganntourensis | Sp. nov | Valid | Pacaud & Lebrun | Eocene (Lutetian) | | Morocco | | |
| Sigmesalia imitatrix | Sp. nov | Valid | Pacaud & Lebrun | Late Cretaceous (Maastrichtian) | | Madagascar | | |
| Siphonochelus tambacounda | Sp. nov | Valid | Merle & Pacaud | Eocene (Lutetian) | | Senegal | A species of Siphonochelus. | |
| Solarioconulus kachchhensis | Sp. nov | Valid | Szabó & Jaitly | Middle Jurassic (Callovian) | Chari Formation | India | A member of the family Ataphridae. | |
| Spiroscala elegans | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Phymatopleuridae. | |
| Stegocoelia abscisa | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Orthonematidae. | |
| Stegocoelia arta | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Orthonematidae. | |
| Stegocoelia centrosinuata | Sp. nov | Valid | Ketwetsuriya, Cook & Nützel | Permian (Wordian) | Ratburi Group | Thailand | A member of the family Goniasmatidae. | |
| Stenozone spiralis | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Eotomariidae. | |
| Stephanozyga seminuda | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Pseudozygopleuridae. | |
| Streptacis nalivkini | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Streptacididae. | |
| Strobeus bashkiriensi | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Soleniscidae. | |
| Strophostylus fortuitus | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Platyceratidae. | |
| Stuoraxis crassa | Sp. nov | Valid | Guzhov | Jurassic | | Russia | A member of the family Stuoraxidae. | |
| Sulcoactaeon? haboensis | Sp. nov | Valid | Szabó & Jaitly | Middle Jurassic (Bathonian) | Patcham Formation | India | A member of the family Aplustridae. | |
| Sulcomitrella sceauxensis | Sp. nov | Valid | Landau, Ceulemans & Van Dingenen | Miocene (Tortonian) | | France | A species of Sulcomitrella. | |
| Sveltia castellum | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A species of Sveltia. | |
| Sveltia ruginosa | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A species of Sveltia. | |
| Sveltia varonei | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A species of Sveltia. | |
| Tapinotomaria cancellata | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Portlockiellidae. | |
| Tatara pseudosassia | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | | |
| Tectonatica anistratenkorum | Sp. nov | Valid | Pedriali, Sosso & Dell'Angelo | Miocene | | Ukraine | A species of Tectonatica. | |
| Tectonatica pseudoprietoi | Sp. nov | Valid | Pedriali, Sosso & Dell'Angelo | Miocene | | Ukraine | A species of Tectonatica. | |
| Tectus extraconicus | Sp. nov | Valid | Gain, Belliard & Le Renard | Eocene | | France | A species of Tectus. | |
| Tectus fluctus | Sp. nov | Valid | Gain, Belliard & Le Renard | Eocene | | France | A species of Tectus. | |
| Tectus fredevillensis | Sp. nov | Valid | Gain, Belliard & Le Renard | Eocene | | France | A species of Tectus. | |
| Tectus gervillii | Sp. nov | Valid | Gain, Belliard & Le Renard | Eocene | | France | A species of Tectus. | |
| Tectus? indecorus | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | Possibly a species of Tectus. | |
| Tectus leae | Sp. nov | Valid | Gain, Belliard & Le Renard | Eocene | | France | A species of Tectus. | |
| Tectus planibasis | Sp. nov | Valid | Gain, Belliard & Le Renard | Eocene | | France | A species of Tectus. | |
| Tectus richardi | Sp. nov | Valid | Gain, Belliard & Le Renard | Eocene | | France | A species of Tectus. | |
| Tectus spinalis | Sp. nov | Valid | Gain, Belliard & Le Renard | Eocene | | France | A species of Tectus. | |
| Tectus torticostulus | Sp. nov | Valid | Gain, Belliard & Le Renard | Eocene | | France | A species of Tectus. | |
| Temnotropis stevniensis | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | | |
| Termihabena | Gen. et sp. et comb. nov | Valid | Mazaev | Early Permian | | Russia | Genus includes new species T. lirata, as well as Т. nikitowkensis (Yakowlew, 1899), T. asiatica (Licharew, 1967), T. millegranosa (Girty, 1934) and T. pinegensis (Mazaev, 2006). | |
| Thereitis carlsbergi | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | | |
| Thereitis cretacea | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | | |
| Thylacodes contendis | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | A species of Thylacodes. | |
| Toronyella | Gen. et 2 sp. nov | Valid | Szabó et al. | Jurassic | | Italy | Genus includes new species T. lineata and T. margaritata. | |
| Torquesia (Ispharina) atax | Nom. nov | Valid | Pacaud | Paleogene | | France | | |
| Trachydomia shkurkoi | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Trachyspiridae. | |
| Trapanimaria | Gen. et 3 sp. nov | Valid | Szabó et al. | Jurassic | | Italy | Genus includes new species T. gattoi, T. nicolosiensis and possibly also T? pallinii. | |
| Tritia albrechti | Sp. nov | Valid | Stein | Miocene | | North Sea basin | A species of Tritia. | |
| Tritia girondica kautskyi | Subsp. nov | Valid | Stein | Miocene | | North Sea basin | | |
| Tritia hemmoorica | Sp. nov | Valid | Stein | Miocene | | North Sea basin | A species of Tritia. | |
| Tritia jyllandica | Sp. nov | Valid | Stein | Miocene | | North Sea basin | A species of Tritia. | |
| Tritia karinwienrichae | Nom. nov | Valid | Stein | Miocene | | Germany | A species of Tritia; a replacement name for Nassarius karinae Wienrich (2001). | |
| Tritia kostejana krocki | Subsp. nov | Valid | Stein | Miocene | | North Sea basin | | |
| Tritia mostafavii | Nom. nov | Valid | Stein | Miocene | | Germany | A species of Tritia; a replacement name for Hinia coronata Mostafavi (1978). | |
| Tritia mothsi | Sp. nov | Valid | Stein | Miocene | | North Sea basin | A species of Tritia. | |
| Tritia sorgenfreii | Sp. nov | Valid | Stein | Miocene | | North Sea basin | A species of Tritia. | |
| Tritia turtaudierei | Sp. nov | Valid | Landau, Ceulemans & Van Dingenen | Miocene (Tortonian) | | France | A species of Tritia. | |
| Tritia westfalica | Sp. nov | Valid | Stein | Miocene | | North Sea basin | A species of Tritia. | |
| Tritonophon grandis | Sp. nov | In press | Ebbestad et al. | Late Ordovician | Lower Second Bani Formation | Morocco | A member of the family Bellerophontidae. Announced in 2019; the final version of the article naming it is not published yet. | |
| Trochotomaria conoidea | Sp. nov | Valid | Szabó et al. | Jurassic | | Italy | | |
| Trochotomaria polymorpha | Sp. nov | Valid | Szabó et al. | Jurassic | | Italy | | |
| Tropacerithium | Gen. et 2 sp. nov | Valid | Gründel, Keupp & Lang | Late Jurassic (Kimmeridgian) | | Germany | A member of Cerithioidea possibly belonging to the family Cryptaulacidae. The type species is T. cumaritum; genus also includes T. danubii. | |
| Tychonia fortis | Sp. nov | Valid | Mazaev | Early Permian | | Russia | A member of the family Anomphalidae. | |
| Typhina cryptica | Sp. nov | Valid | Merle & Pacaud | Eocene (Ypresian) | | France | A species of Typhina. | |
| Typhina radulfiensis | Sp. nov | Valid | Merle & Pacaud | Eocene (Priabonian) | | France | A species of Typhina. | |
| Unitas aequalis | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A member of the family Cancellariidae. | |
| Unitas aquitanica | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A member of the family Cancellariidae. | |
| Unitas arenosa | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A member of the family Cancellariidae. | |
| Unitas decorticata | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A member of the family Cancellariidae. | |
| Unitas gradata | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A member of the family Cancellariidae. | |
| Unitas heinbergi | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | | |
| Unitas sanctistephani | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A member of the family Cancellariidae. | |
| Unitas substephanensis | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A member of the family Cancellariidae. | |
| Urlocella undulata | Sp. nov | Valid | Guzhov | Jurassic | | Russia | A member of the family Cimidae. | |
| Unzhispira | Gen. et sp. nov | Valid | Guzhov | Jurassic | | Russia | A member of the family Cimidae. Genus includes new species U. minuta. | |
| Vatopsis heinbergi | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | | |
| Vermeijia | Gen. et sp. nov | Valid | Amano | Late Pliocene | Kuwae Formation | Japan | A member of the family Capulidae. Genus includes new species V. japonica. | |
| Vernelia samae | Sp. nov | Valid | Foster et al. | Early Triassic | | China | | |
| Vexillum? rosenkrantzi | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | Possibly a species of Vexillum. | |
| Vexillum tenestolidum | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | A species of Vexillum. | |
| Vicinocerithium vynckei | Nom. nov | Valid | Pacaud | Paleogene | | France | | |
| Vicnigoria | Gen. et sp. nov | Valid | Mazaev | Early Permian | | Russia | Probably a member of the family Trochonematidae. Genus includes new species V. monstrata. | |
| Viennella | Gen. et comb. et sp. nov | Valid | Harzhauser & Landau | Middle Miocene | | Austria  Hungary | A member of the family Turritellidae. The type species is "Turritella" incisaeformis Csepreghy-Meznerics (1956); genus also includes new species V. ignorata. | |
| Viviparus riegensis | Nom. nov | Valid | Pacaud | Paleogene | | France | A species of Viviparus. | |
| Volvarina sibuzatiana | Sp. nov | Valid | Lozouet | Oligocene (Chattian) | | France | A species of Volvarina. | |
| Wateletia custodia | Nom. nov | Valid | Pacaud | Paleogene | | France | | |
| Worthenia? waterhouse | Sp. nov | Valid | Ketwetsuriya, Cook & Nützel | Permian (Wordian) | Ratburi Group | Thailand | A member of the family Lophospiridae. | |
| Zarnglaffia palermitana | Sp. nov | Valid | Szabó et al. | Jurassic | | Italy | | |
| Zarnglaffia polygonalis | Sp. nov | Valid | Szabó et al. | Jurassic | | Italy | | |
| Zebinella selandica | Sp. nov | Valid | Hansen | Cretaceous-Paleogene boundary | | Denmark | A species of Zebinella. | |
| Zizipupa | Gen. et sp. nov | Valid | Guzhov | Jurassic | | Russia | A member of the family Ampezzanildidae. Genus includes new species Z. costata. | |

## Other molluscs
### Research

* A study on shell microstructures of specimens of Anabarella australis from the Cambrian Series 2 Xinji Formation of the North China Block is published by Li et al. (2019).
* A study on the relative importance of bivalves and brachiopods in the fossil assemblages from the Carboniferous Pennsylvanian Breathitt Formation of Kentucky is published by Hsieh, Bush & Bennington (2019).
* A study on transitional Permian-Triassic bivalve fauna from five sections of littoral clastic facies in southwestern China is published by Song et al. (2019).
* A study on body size changes in bivalves in the aftermath of the Permian–Triassic extinction event is published online by Atkinson & Wignall (2019).
* A study on changes of body size of bivalves belonging to the family Limidae prior to, and in the aftermath of the Triassic–Jurassic extinction event is published by Atkinson et al. (2019).
* A study on changes in the body size of benthic marine bivalves and brachiopods from the Lusitanian Basin (Portugal) before the Toarcian oceanic anoxic event is published by Piazza et al. (2019).
* A study on the impact of the early Toarcian extinction event on fossil brachiopods and bivalves known from the Iberian Range (Spain) is published by Danise et al. (2019).
* A study on the impact of the Early Toarcian Oceanic Anoxic Event on the population of the bivalve species Posidonotis cancellata from the Neuquén Basin (Argentina) is published by Franch et al. (2019).
* A study on the temporal and spatial distribution of pectinid and ostreid bivalves in Middle and Late Jurassic sequences exposed in the Tanggula Mountains (China) is published by Sha (2019).
* A study on muscle attachment sites preserved in phosphatized inoceramid Gnesioceramus anglicus, and on their implications for inferring the palaeobiology of inoceramid bivalves, is published by Knight & Morris (2019).
* A sclerochronological study of shells of the gigantic inoceramids Sphenoceramus schmidti and S. sachalinensis from the middle Campanian Yezo Basin in Hokkaido (Japan) is published by Walliser et al. (2019).
* A study on the relationship of growth rate in the scallop Carolinapecten eboreus to temperature and primary production, and on its implications for inferring the cause of extinction of this species, is published by Johnson et al. (2019).

### New taxa

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes |
| Acharax svalbardensis | Sp. nov | Valid | Hansen et al. | Late Pleistocene | | Fram Strait | A bivalve belonging to the family Solemyidae. |
| Atomodesma? hautmanni | Sp. nov | Valid | Foster et al. | Early Triassic | | China | A bivalve. |
| Atrina multicostata | Sp. nov | Valid | Friesenbichler et al. | Middle Triassic (Anisian) | Caerace Formation | Romania | A bivalve, a species of Atrina. |
| Baxoitrigonia | Gen. et sp. nov | | Stiller & Chen | Late Jurassic (Tithonian) | Lagongtang Formation | China | A bivalve. Genus includes new species B. baxoiensis. |
| Bengtsonella | Gen. et comb. nov | Junior homonym | Cooper & Leanza | Early Cretaceous (Albian) | Riachuelo Formation | Brazil | A bivalve belonging to the family Megatrigoniidae and the subfamily Megatrigoniinae. The type species is "Anditrigonia" britoi Hessel (2005). The generic name is preoccupied by Bengtsonella Muller & Hinz (1991) and Bengtsonella Mostler (1996); Ceccolini & Cianferoni (2021) coined a replacement name Bengtsonigonia. |
| Californigonia | Gen. et comb. nov | Valid | Cooper & Leanza | Jurassic (Callovian–early Oxfordian) | Bicknell Sandstone | Canada ( British Columbia)  United States ( California) | A bivalve belonging to the subfamily Megatrigoniinae. The type species is "Trigonia" plumasensis Hyatt (1892). |
| Callocardia (Nitidavenus) youssoufia | Sp. nov | Valid | Pacaud & Lebrun | Eocene (Lutetian) | | Morocco | A bivalve. |
| Callucina itaporangensis | Sp. nov | Valid | Ayoub-Hannaa et al. | Cretaceous | Cotinguiba Formation | Brazil  United Kingdom | A bivalve belonging to the family Lucinidae. |
| Cardiocardita peregrina | Sp. nov | Valid | Pacaud & Lebrun | Eocene (Lutetian) | | Morocco | A bivalve. |
| Carditella pitufina | Sp. nov | Valid | Pérez | Early Pliocene | | Argentina | A bivalve belonging to the family Condylocardiidae. |
| Chlamys (Praechlamys) prima | Sp. nov | Valid | Friesenbichler et al. | Middle Triassic (Anisian) | Caerace Formation | Romania | A bivalve, a species of Chlamys. |
| Ckaraosippur | Gen. et comb. et sp. nov | Valid | Santelli & del Río | Miocene–Pliocene | Bahía Inglesa Formation Camarones Formation Navidad Formation | Argentina  Chile | A scallop. The type specie is "Pecten" calderensis Möricke (1896); genus also includes new species C. camachoi. |
| Conchocele yatsuoensis | Sp. nov | Valid | Amano et al. | Early Miocene | Kurosedani Formation | Japan | A bivalve. |
| Costacallista discrepans | Sp. nov | Valid | Pacaud & Lebrun | Eocene (Lutetian) | | Morocco | A bivalve. |
| Craginella | Gen. et comb. nov | Valid | Cooper & Leanza | Late Jurassic (Kimmeridgian) | Malone Formation | Mexico  United States ( Louisiana Texas) | A bivalve belonging to the subfamily Megatrigoniinae. The type species is "Trigonia" goodellii Cragin (1897). |
| Damborenella | Gen. et comb. nov | Valid | Cooper & Leanza | Late Jurassic (Tithonian) | | Argentina  Chile  Colombia  Peru | A bivalve belonging to the subfamily Megatrigoniinae. The type species is "Trigonia" eximia Philippi (1899); genus also includes "Trigonia" discors Philippi (1899), "Anditrigonia" lamberti Levy (1967) and "Anditrigonia eximia" tesselicaudata Leanza (1993) (raised to the rank of a separate species Damborenella tessellicaudata). |
| Dentalium mcganna | Sp. nov | Valid | Powell, Clites & Poust | Miocene | Sobrante Formation | United States ( California) | A species of Dentalium. |
| Dietotenhosen | Gen. et comb. nov | Valid | Santelli & del Río | Miocene–Pliocene | Bahía Inglesa Formation Coquimbo Formation Horcón Formation Hornillos Formation Huaricangana Formation La Portada Formation Pisco Formation Taime Formation | Chile  Peru | A scallop. Genus includes D. hupeanus (Philippi, 1887) and D. remondi (Philippi, 1887). |
| Dosinia (Dosinisca) vredenburgi | Sp. nov | Valid | Borkar & Kulkarni | Miocene | Chhasra Formation Khari Nadi Formation Lower Mekran Series | India  Pakistan | A bivalve belonging to the family Veneridae; a species of Dosinia. |
| Dosinia (Dosinisca) wynnei | Sp. nov | Valid | Borkar & Kulkarni | Miocene | Chhasra Formation Khari Nadi Formation Lower Mekran Series | India  Pakistan | A bivalve belonging to the family Veneridae; a species of Dosinia. |
| Entolium reticulatum | Sp. nov | Valid | Friesenbichler et al. | Middle Triassic (Anisian) | Caerace Formation | Romania | A bivalve. |
| Eosphaera | Gen. et comb. nov | Valid | Fürsich, Heinze & Ayoub-Hannaa | Jurassic (Callovian to Kimmeridgian) | | Egypt  India  Madagascar  Portugal | A bivalve belonging to the family Lucinidae. The type species is "Sphaera" madagascariensis Newton (1889). |
| Chaetopleura abbessi | Sp. nov | Valid | Cherns & Schwabe | Oligocene (Chattian) and Miocene (Burdigalian) | | France | A chiton. Originally described as a species of Chaetopleura; subsequently transferred to the genus Ischnochiton by Dell'Angelo et al. (2018). |
| Chaetopleura gaasi | Sp. nov | Valid | Cherns & Schwabe | Oligocene (Rupelian) | | France | A chiton, Originally described as a species of Chaetopleura; subsequently transferred to the new genus Spinochiton by Dell'Angelo et al. (2018). |
| Helcionella lemdadensis | Sp. nov | Valid | Geyer, Valent & Meier | Cambrian | Tannenknock Formation | Germany | |
| Hoernesia? danisa | Sp. nov | Valid | Foster et al. | Early Triassic | | China | A bivalve. |
| Homopleura | Gen. et comb. et 2 sp. nov | Valid | Masse & Fenerci-Masse | Cretaceous | | Bulgaria  France | A rudist bivalve. The type species is "Monopleura" affinis Matheron (1878); genus also includes "Monopleura" imbricata Matheron (1842) and "Monopleura" coquandi Matheron (1878), as well as new species H. rustrella and H. balkanica. |
| Inoceramus chiplonkari | Sp. nov | Valid | Walaszczyk in Gale, Kennedy & Walaszczyk | Late Cretaceous (Cenomanian and Turonian) | Karai Formation | India  Japan | |
| Ischnochiton crovatoi | Sp. nov | Valid | Dell'Angelo, Sosso & Bonfitto | Pleistocene | | Italy | A chiton, a species of Ischnochiton. |
| Ischnochiton fehsei | Sp. nov | Valid | Cherns & Schwabe | Eocene | | France | A chiton, a species of Ischnochiton. |
| Lasaea firma | Sp. nov | Valid | Lesport & Lozouet in Lesport et al. | Miocene (Aquitanian) | | France | A bivalve belonging to the family Lasaeidae. |
| Leptostega frankenwaldensis | Sp. nov | Valid | Geyer, Valent & Meier | Cambrian | Tannenknock Formation | Germany | A helcionelloid. |
| Neilo altamirano | Sp. nov | Valid | Kiel et al. | Early Oligocene | Talara Basin | Peru | A bivalve belonging to the family Malletiidae. |
| Neocrassina (Pruvostiella) madagascariensis | Sp. nov | Valid | Fürsich, Heinze & Ayoub-Hannaa | Late Jurassic (Oxfordian) | Morondava Basin | Madagascar | A bivalve belonging to the family Astartidae. |
| Palaeonucula feruglioi | Sp. nov | Valid | Damborenea & Pagani | Early Jurassic | | Argentina | A bivalve. |
| Parailsanella luonanensis | Sp. nov | Valid | Li et al. | Cambrian Series 2 | Xinji Formation | China | A helcionellid. |
| Peronaea basteroti | Sp. nov | Valid | Lesport, Lozouet & Pacaud in Lesport et al. | Miocene (Aquitanian) | | France | A bivalve, a species of Peronaea. |
| Phaenodesmia? piatnitzkyi | Sp. nov | Valid | Damborenea & Pagani | Early Jurassic | | Argentina | A bivalve. |
| Pinna simionescui | Sp. nov | Valid | Friesenbichler et al. | Middle Triassic (Anisian) | Caerace Formation | Romania | A bivalve, a species of Pinna. |
| Platymyoidea morrisi | Sp. nov | Valid | Hodges | Early Jurassic | | United Kingdom | A bivalve. |
| Pleurophopsis matsumotoi | Sp. nov | Valid | Amano et al. | Late Oligocene to early Miocene | Nabae Group | Japan | A bivalve belonging to the family Vesicomyidae. |
| Pleurophopsis talarensis | Sp. nov | Valid | Kiel et al. | Early Oligocene | Talara Basin | Peru | A bivalve belonging to the family Vesicomyidae. |
| Praedicerocardium | Gen. et sp. nov | Valid | Friesenbichler et al. | Middle Triassic (Anisian) | Caerace Formation | Romania | A bivalve. Genus includes new species P. vetulus. |
| Praenucula pojetai | Sp. nov | In press | Ebbestad et al. | Late Ordovician | | Morocco | A bivalve belonging to the family Praenuculidae. Announced in 2019; the final version of the article naming it is not published yet. |
| Procardia inouei | Sp. nov | Valid | Amano | Paleocene | Katsuhira Formation | Japan | A bivalve belonging to the group Anomalodesmata and to the family Parilimyidae. |
| Pseudophopsis | Gen. et comb. nov | Valid | Kiel et al. | Eocene and Early Oligocene | Talara Basin | Cuba  Peru | A bivalve belonging to the group Heterodonta and to the family Kalenteridae. The type species is "Pleurophopsis" peruviana Olsson (1931); genus also includes "Unio" bitumen Cooke (1919). |
| Quenstedtia madagascariensis | Sp. nov | Valid | Fürsich, Heinze & Ayoub-Hannaa | Late Jurassic (Oxfordian) | Morondava Basin | Madagascar | A bivalve belonging to the family Quenstedtiidae. |
| Ramentoides xixiangensis | Sp. nov | Valid | Qin et al. | Cambrian | | China | A member of Maikhanellidae. |
| Romaniamya | Gen. et sp. nov | Valid | Friesenbichler et al. | Middle Triassic (Anisian) | Caerace Formation | Romania | A bivalve. Genus includes new species R. mahmudiaensis. |
| Rutitrigonia cintarojensis | Sp. nov | Valid | Cataldo et al. | Early Cretaceous (Barremian) | Huitrín Formation | Argentina | A bivalve. |
| Ryderia tehuelchana | Sp. nov | Valid | Damborenea & Pagani | Early Jurassic | | Argentina | A bivalve. |
| Scythentolium anisicum | Sp. nov | Valid | Friesenbichler et al. | Middle Triassic (Anisian) | Caerace Formation | Romania | A bivalve. |
| Sogdianagonia | Nom. nov | Valid | Schneider & Kelly | Late Cretaceous (Cenomanian to Turonian) | | Kyrgyzstan  Uzbekistan | A bivalve belonging to the family Megatrigoniidae; a replacement name for Turkestanella Tashiro (1979). The type species is "Trigonia" turkestanensis Arkhangelsky (1916). |
| Solemya lucifuga | Sp. nov | Valid | Pérez-Barría & Nielsen | Early Miocene | Ranquil Formation | Chile | A bivalve, a species of Solemya. |
| Stenoplax monila | Sp. nov | Disputed | Cherns & Schwabe | Oligocene (Rupelian) | | France | A chiton. Originally described as a species of Stenoplax; Dell'Angelo et al. (2020) considered this species to be a junior synonym of Lepidochitona oligocaena. |
| Tindaria kretensis | Sp. nov | Valid | Koskeridou, La Perna & Giamali | Early Pliocene | | Greece | A bivalve. |
| Tonicella lira | Sp. nov | Valid | Cherns & Schwabe | Oligocene (Chattian) | | France | A chiton, a species of Tonicella. |
| Vaccinites alceotarlaoi | Sp. nov | Valid | Pons et al. | Late Cretaceous (early Campanian) | | Serbia  Spain | A rudist bivalve. |
| Vaccinites bilottei | Sp. nov | Valid | Pons et al. | Late Cretaceous (late Campanian) | | Bulgaria | A rudist bivalve. |
| Vaccinites pirenaicus | Sp. nov | Valid | Pons et al. | Late Cretaceous (late Campanian) | | Spain | A rudist bivalve. |
| Wareniconcha mercenarioides | Sp. nov | Valid | Kase et al. | Pliocene | | Philippines | A bivalve belonging to the family Vesicomyidae. |
| Xylophagella littlei | Sp. nov | Valid | Hryniewicz in Hryniewicz et al. | Late Paleocene | Basilika Formation | Norway | A bivalve belonging to the family Pholadidae. |
| Yoldiella spitsbergensis | Sp. nov | Valid | Amano in Hryniewicz et al. | Late Paleocene | Basilika Formation | Norway | A bivalve belonging to the family Yoldiidae. |