# 2025 in paleomalacology

This list of fossil molluscs described in 2025 is a list of new taxa of fossil molluscs that were described during the year 2025, as well as other significant discoveries and events related to molluscan paleontology that occurred in 2025.

## Ammonites

| Name | Novelty | Status | Authors | Age | Type locality | Location | Notes |
| Hybopeltoceras olorizi | Sp. nov | | Sarti et al. | Late Jurassic (Tithonian) | Bugarone Formation | Italy | A member of the family Aspidoceratidae. |
| Itierella | Gen. et sp. nov | Valid | Pictet, Hugon & Pierangelini | Early Cretaceous (Valanginian) | Grand Essert Formation | France | A member of the family Neocomitidae. The type species is I. melognensis. |
| Jurienella | Gen. et comb. nov | Valid | Pictet & Bulot | Early Cretaceous (Hauterivian) | | France  Switzerland | A member of the family Neocomitidae. The type species is "Breistrofferella" peyroulensis Atrops, Autran & Reboulet (1996). |
| Paradicostella | Gen. et sp. nov | Valid | Pictet, Hugon & Pierangelini | Early Cretaceous (Valanginian) | Grand Essert Formation | France | A member of the family Neocomitidae. The type species is P. hautevillelompnesensis. |

### Ammonite research

* Đaković, Mrdak & Gawlick (2025) describe three assemblages of Anisian ammonoids from the Komarani and Bulog formations (Montenegro), including fossils of Ptychites rugifer, Megaphyllites obolus, Parakellnerites rothpletzi, Apleuroceras decrescens, Proteusites labiatus, Tropigastrites lahontanus, Proarcestes pannonicus, Proarcestes subtridentinus and Aristoptychites sp. extending known geographical ranges of these taxa.
* Description and study on the biostratigraphy of the ammonite assemblage from the Jurassic strata from Sierra de Reyes (Mendoza Province, Argentina) is published by Riccardi, Gulisano & Gutierrez-Pleimling (2025).
* A study on the morphology and growth of Rehmannia richei is published by Douas Bengoudira et al. (2025).
* Cadena, Bustos & Lehmann (2025) describe bochianitid fossils from the Valanginian and Hauterivian strata of the Rosablanca Formation (Colombia), extending known range of Bochianites neocomiensis and Janenschites oosteri to the northern part of South America.
* A study on the ontogenetic shell development of Yabeiceras orientale, Y. cf. manasoaense, Forresteria yezoensis and F. muramotoi is published by Inose & Watanabe (2025).
* A study on shell breakages in specimens of Hoploscaphites nicolletii from the Upper Cretaceous Fox Hills Formation (South Dakota, United States), interpreted as evidence of lethal attacks by durophagous predators, is published by Tajika et al. (2025).

## Other cephalopods

| Name | Novelty | Status | Authors | Age | Type locality | Location | Notes |
| Beloitoceras uuemoisense | Sp. nov | Valid | Kröger | Ordovician (Katian) | Adila Formation | Estonia | A member of the family Oncoceratidae. |
| Cyrtorizoceras hariense | Sp. nov | Valid | Kröger | Ordovician (Katian) | Kõrgessaare Formation | Estonia | A member of the family Oncoceratidae. |
| Danoceras oviforme | Sp. nov | Valid | Kröger | Ordovician (Katian) | Kõrgessaare Formation | Estonia | A member of the family Diestoceratidae. |
| Danoceras piersalense | Comb. nov | Valid | (Teichert) | Ordovician | Moe Formation | Estonia | A member of the family Diestoceratidae; moved from "Dowlingoceras" piersalense Teichert (1930). |
| Danoceras vohilaidense | Sp. nov | Valid | Kröger | Ordovician (Katian) | Adila Formation | Estonia | A member of the family Diestoceratidae. |
| Deckeroceras balticum | Sp. nov | Valid | Kröger | Ordovician (Katian) | Adila Formation | Estonia | A member of the family Uranoceratidae. |
| Discoceras paopense | Sp. nov | Valid | Kröger | Ordovician (Katian) | Kõrgessaare Formation | Estonia | A member of the family Trocholitidae. |
| Dowlingoceras tornense | Sp. nov | Valid | Kröger | Ordovician (Katian) | Adila Formation | Estonia | A member of the family Diestoceratidae. |
| Ephippiorthoceras vormsiense | Sp. nov | Valid | Kröger | Ordovician (Katian) | Adila Formation | Estonia | A member of the family Proteoceratidae. |
| Gorbormoceras | Gen. et sp. nov | Valid | Kröger | Ordovician (Katian) | Adila Formation | Estonia | A member of Actinocerida belonging to the family Ormoceratidae. The type species is G. vohilaidense. |
| Gorbyoceras clathratoannulatum | Comb. nov | Valid | (Roemer) | Ordovician | | Poland | A member of the family Proteoceratidae; moved from "Orthoceras" clathrato-annulatum Roemer (1861). |
| Hiiumoceras | Gen. et sp. nov | Valid | Kröger | Ordovician (Katian) | Kõrgessaare Formation | Estonia | A member of the family Graciloceratidae. The type species is H. hiiuense. |
| Hosholmoceras | Gen. et sp. nov | Valid | Kröger | Ordovician (Katian) | Adila Formation | Estonia | A member of the family Cyrtogomphoceratidae. The type species is H. ovalis. |
| Isorthoceras luhai | Comb. nov | Valid | (Stumbur) | Ordovician | | Estonia | A member of the family Proteoceratidae; moved from "Orthoceras" luhai Stumbur (1956). |
| Isorthoceras saaremense | Comb. nov | Valid | (Balashov) | Ordovician | | Estonia | A member of the family Proteoceratidae; moved from "Hedstroemoceras" saaremense Balashov (1959). |
| Kiaeroceras kaebliki | Sp. nov | Valid | Kröger | Ordovician (Katian) | Kõrgessaare Formation | Estonia | A member of the family Cyrtogomphoceratidae. |
| Kiaeroceras ormsoense | Sp. nov | Valid | Kröger | Ordovician (Katian) | Kõrgessaare Formation | Estonia | A member of the family Cyrtogomphoceratidae. |
| Kiaeroceras urgense | Sp. nov | Valid | Kröger | Ordovician (Katian) | Kõrgessaare Formation | Estonia | A member of the family Cyrtogomphoceratidae. |
| Redpathoceras saxbyense | Sp. nov | Valid | Kröger | Ordovician (Katian) | Kõrgessaare Formation | Estonia | A member of Ascocerida belonging to the family Probillingsitidae. |
| Richardsonoceras priscum | Comb. nov | Valid | (Eichwald) | Ordovician (Katian) | Kõrgessaare Formation | Estonia | A member of the family Oncoceratidae; moved from "Cyrtoceras" priscum Eichwald (1860). |
| Rizosceras teres | Sp. nov | Valid | Kröger | Ordovician (Katian) | Kõrgessaare Formation | Estonia | A member of the family Oncoceratidae. |
| Saxbyoceras | Gen. et sp. nov | Valid | Kröger | Ordovician (Katian) | Kõrgessaare Formation | Estonia | A member of the family Apsidoceratidae. The type species is S. kingpooli. |
| Schuchertoceras deformis | Comb. nov | Valid | (Eichwald) | Ordovician (Katian) | Kõrgessaare Formation | Estonia | A member of the family Ascoceratidae; moved from "Ascoceras" deforme Eichwald (1860). |
| Strandoceras kalevipoegi | Sp. nov | Valid | Kröger | Ordovician (Katian) | Kõrgessaare Formation | Estonia | A member of the family Cyrtogomphoceratidae. |
| Strandoceras kohilense | Sp. nov | Valid | Kröger | Ordovician (Katian) | Kõrgessaare Formation | Estonia | A member of the family Cyrtogomphoceratidae. |
| Strandoceras muhvi | Sp. nov | Valid | Kröger | Ordovician (Katian) | Kõrgessaare Formation | Estonia | A member of the family Cyrtogomphoceratidae. |
| Strandoceras sulevipoegi | Sp. nov | Valid | Kröger | Ordovician (Katian) | | Estonia | A member of the family Cyrtogomphoceratidae. |
| Striatocycloceras hosholmense | Sp. nov | Valid | Kröger | Ordovician (Katian) | Adila Formation | Estonia | A member of the family Orthoceratidae. |
| Wennanoceras remotum | Sp. nov | | Song et al. | Ordovician | | China | |
| Wutinoceras multiseptum | Sp. nov | | Song et al. | Ordovician | | China | A member of Actinocerida belonging to the family Wutinoceratidae. |
| Xiaohenautilus chatelaini | Sp. nov | Valid | Jenks et al. | Early Triassic | Dinwoody Formation | United States ( Nevada) | A member of the family Grypoceratidae. |

## Bivalves

| Name | Novelty | Status | Authors | Age | Type locality | Location | Notes |
| Peredmondia | Gen. et comb. nov | Valid | Hodges | Triassic | | Italy | The type species is "Anomia" favrii Stoppani (1863). |
| Rhynchostreon cauveryensis | Sp. nov | Valid | Chattopadhyay et al. | Late Cretaceous (Maastrichtian) | Kallnakurichchi Formation | India | A member of the family Gryphaeidae. |
| Streblochondria dalianensis | Sp. nov | | Han et al. | | Taiyuan Formation | China | A member of Pectinida belonging to the family Streblochondriidae. |

## Gastropods

| Name | Novelty | Status | Authors | Age | Type locality | Location | Notes |
| Admete trigostomoides | Sp. nov | Valid | Bouchard et al. | Pleistocene (Gelasian) | | France | A species of Admete. |
| Alvania selsoifensis | Sp. nov | Valid | Bouchard et al. | Pleistocene (Gelasian) | | France | A species of Alvania. |
| Calliostoma normanensis | Sp. nov | Valid | Bouchard et al. | Pleistocene (Gelasian) | | France | A species of Calliostoma. |
| Ceratostoma? steiningeri | Sp. nov | Valid | Harzhauser, Landau & Merle | Miocene | Gauderndorf Formation | Austria | Possibly a species of Ceratostoma. |
| Crassimurex (Eopaziella) zoltani | Sp. nov | Valid | Harzhauser, Landau & Merle | Miocene | Dej Formation | Romania | A species of Crassimurex. |
| Haliotis plioetrusca | Sp. nov | Valid | Dominici et al. | Pliocene | | Italy | A species of Haliotis. |
| Islamia juliomarcosi | Sp. nov | Valid | Talaván-Serna | Neogene | | Spain | A species of Islamia. |
| Kestocenebra vermeiji | Sp. nov | Valid | Harzhauser, Landau & Merle | Miocene | Grund Formation | Austria  Czech Republic | A member of the family Muricidae. |
| Neoberingius minamichitaensis | Sp. nov | Valid | Kawase | Miocene | Yamami Formation | Japan | A member of the family Buccinidae. |
| Ocenebra breitenbergeri | Sp. nov | Valid | Harzhauser, Landau & Merle | Miocene | Tırtar Formation | Turkey | A species of Ocenebra. |
| Ocenebra littoralis | Nom. nov | Valid | Harzhauser, Landau & Merle | Miocene | Loibersdorf Formation | Austria | A species of Ocenebra; a replacement name for Murex (Ocinebrina) erinaceus sublaevis Schaffer (1912). |
| Ocenebra scorpio | Sp. nov | Valid | Harzhauser, Landau & Merle | Miocene | Grund Formation | Austria | A species of Ocenebra. |
| Ocinebrina bellissima | Sp. nov | Valid | Harzhauser, Landau & Merle | Miocene | Dej Formation | Romania | A species of Ocinebrina. |
| Ocinebrina s.l. praescalaris | Sp. nov | Valid | Harzhauser, Landau & Merle | Miocene | Baden Formation | Austria  Czech Republic | A member of the family Muricidae. |
| Ocinebrinopsis | Gen. et comb. et 4 sp. nov | Valid | Harzhauser, Landau & Merle | Miocene | | Austria  Bosnia and Herzegovina  Bulgaria  Czech Republic  France  Hungary  Italy  Moldova  Poland  Romania  Slovakia  Turkey  Ukraine | A member of the family Muricidae. The type species is "Ocenebra" orientalis Friedberg (1928); genus also includes "Ocinebrina" bertai Kovács (2020), "Murex" crassilabiatus Hilber (1879), "Murex (Occenebra)" credneri Hoernes & Auinger (1885), "Ocinebrina" deaki Kovács, Leél-Őssy & Vicián (2023), "Murex (Occenebra) sublavatus" var. grundensis Hoernes & Auinger (1885; raised to the rank of the species O. grundensis), "Tritonium" striatum Eichwald (1830), "Pollia" weinsteigensis Hoernes & Auinger (1890), "Fusus" coelatus (Dujardini, 1837) and "Murex" dertonensis Bellardi (1873), as well as new species O. aperta, O. dominicii, O. gregaria and O. subnuda. |
| Pterynopsis guzhovi | Nom. nov | Valid | Harzhauser, Landau & Merle | Miocene | | Ukraine | A species of Pterynopsis; a replacement name for Murex affinis Eichwald (1830). |
| Seila quinquecarinata | Sp. nov | Valid | Bouchard et al. | Pleistocene (Gelasian) | | France | A species of Seila. |
| Timbellus kovacsi | Sp. nov | Valid | Harzhauser, Landau & Merle | Miocene | | Czech Republic  Romania | A species of Timbellus. |
| Timbellus weinmannae | Sp. nov | Valid | Harzhauser, Landau & Merle | Miocene | Dej Formation | Austria  Italy  Romania | A species of Timbellus. |

### Gastropod research

* A study on the evolution of the columellar folds in gastropods, based on data from extant and fossil taxa, is published by Vermeij (2025).
* A study on the diversity of Permian and Triassic gastropods is published by Dominici (2025), who interprets increase of diversity of carnivorous gastropods during the Middle-Late Triassic transition as related to evolution of reef ecosystems at the same time.

## Other molluscs

| Name | Novelty | Status | Authors | Age | Type locality | Location | Notes | Images |
| Emo | Gen. et sp. nov | Valid | Sutton et al. | Silurian | Coalbrookdale Formation | United Kingdom | An early aculiferan related to heloplacids. The type species is E. vorticaudum. | |
| Punk | Gen. et sp. nov | Valid | Sutton et al. | Silurian | Coalbrookdale Formation | United Kingdom | An early aculiferan related to modern aplacophorans. The type species is P. ferox. | |

### Other molluscan research

* Redescription of the rostroconch species Hoarepora parrishi, based on data from new fossil material from the Moscovian Korobcheevo Formation (Ryazan Oblast, Russia) and Gzhelian Amerevo Formation (Moscow Oblast, Russia) that extends known geographical range of the species, is published by Mazaev (2025).

## General research

* Evidence from the study of the fossil record of Early Jurassic gastropods and bivalves from the epicontinental seas of the north-western Tethys Ocean, indicative of a relationship between the thermal suitability of the studied animals and changes of their occupancy in response to climate changes during the Pliensbachian and Toarcian, is presented by Reddin et al. (2025).
* Description of the assemblage of ammonites and inoceramid bivalves from the Albian strata from the Mangyshlak Anticlinorium (Kazakhstan) is published by Kennedy & Walaszczyk (2025).