# 2017 in arthropod paleontology

This list of fossil arthropods described in 2017 is a list of new taxa of trilobites, fossil insects, crustaceans, arachnids and other fossil arthropods of every kind that are scheduled to be described during the year 2017, as well as other significant discoveries and events related to arthropod paleontology that are scheduled to occur in the year 2017.

## Arachnids
### Research

* A study on the anatomy of the Carboniferous whip spider Graeophonus anglicus, as well as on the phylogenetic relationships of fossil whip spiders, is published by Garwood et al. (2017).
* A study on the morphological diversity of fossil species belonging to the family Archaeidae compared with the diversity of extant species is published by Wood (2017).
* A specimen of the tick species Cornupalpatum burmanicum entangled in a pennaceous feather of an early bird or non-avian pennaraptoran theropod is described from the Cretaceous amber from Myanmar by Peñalver et al. (2017).

### New taxa

| Name | Novelty | Status | Authors | Age | Unit | Location | Notes |
| Aculeatosoma | Gen. et sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Psilodercidae. The type species is A. pyritmutatio. |
| Albiburmops | Gen. et sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A spider belonging to the family Lagonomegopidae. The type species is A. annulipes. |
| Alioatrax | Gen. et sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A spider of uncertain affinities, originally described as a member of the family Hexathelidae. The type species is A. incertus. |
| Amblyomma birmitum | Sp. nov | Valid | Chitimia-Dobler et al. | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A hard tick, a species of Amblyomma. |
| Balticonopsis distalis | Sp. nov | Valid | Wunderlich | Eocene | Baltic amber | Europe (Baltic Sea coast) | A member of the family Anapidae. |
| Balticonopsis dunlopi | Sp. nov | Valid | Wunderlich | Eocene | Baltic amber | Europe (Baltic Sea coast) | A member of the family Anapidae. |
| Balticonopsis ludwigi | Sp. nov | Valid | Wunderlich | Eocene | Bitterfeld amber | Germany | A member of the family Anapidae. |
| Balticonopsis metatarsalis | Sp. nov | Valid | Wunderlich | Eocene | Baltic amber | Europe (Baltic Sea coast) | A member of the family Anapidae. |
| Betaburmesebuthus joergi | Sp. nov | Valid | Lourenço & Rossi | Cretaceous | Burmese amber | Myanmar | A scorpion belonging to the superfamily Buthoidea and the family Palaeoburmesebuthidae. |
| Brignoliblemma | Gen. et 3 sp. nov | Junior synonym | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Tetrablemmidae. Genus includes new species B. bizarre, B. nala and B. paranala. Wunderlich & Müller (2020) considered the genus Brignoliblemma to be a junior synonym of the genus Electroblemma, though the authors maintained the three named species as distinct species within the latter genus. |
| Burmadictyna postcopula | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A deinopoid spider belonging to the family Salticoididae. |
| Burmathele | Gen. et sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of Mesothelae belonging to the family Burmathelidae. The type species is B. biseriata. |
| Burmesarchaea alissa | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Archaeidae. |
| Burmesarchaea caudata | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Archaeidae. |
| Burmesarchaea crassicaput | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Archaeidae. |
| Burmesarchaea crassichelae | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Archaeidae. |
| Burmesarchaea gibber | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Archaeidae. |
| Burmesarchaea gibberoides | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Archaeidae. |
| Burmesarchaea gibbosa | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Archaeidae. |
| Burmesarchaea longicollum | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Archaeidae. |
| Burmesarchaea propinqua | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Archaeidae. |
| Burmesarchaea pseudogibber | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Archaeidae. |
| Burmesarchaea pustulata | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Archaeidae. |
| Burmesarchaea quadrata | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Archaeidae. |
| Burmorchestina acuminata | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Oonopidae. |
| Burmorchestina biangulata | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Oonopidae. |
| Burmorchestina plana | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Oonopidae. |
| Burmorchestina pulcheroides | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Oonopidae. |
| Burmorchestina tuberosa | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Oonopidae. |
| Centruroides knodeli | Sp. nov | Valid | Lourenço | | Mexican amber | Mexico | A scorpion belonging to the family Buthidae, a species of Centruroides. |
| Cethegoides | Gen. et sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Dipluridae. The type species is C. patricki. |
| Cymbioblemma | Gen. et sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Tetrablemmidae. The type species is C. corniger. |
| Cymbioropsis | Gen. et sp. nov | Valid | Wunderlich | Eocene | Baltic amber | Europe (Baltic Sea coast) | A member of the family Zoropsidae. The type species is C. palpussutura. |
| Deinocroton | Gen. et sp. nov | Valid | Peñalver, Arillo, Anderson & Pérez-de la Fuente in Peñalver et al. | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A tick. The type species is D. draculi. |
| Deinopedes | Gen. et sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A spider. Originally assigned to the family Deinopidae, but subsequently transferred to the deinopoid family Eodeinopidae. Genus includes new species D. tranquillus. |
| Eodeinopis | Gen. et sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A deinopoid spider. Originally assigned to the family Burmadictynidae, but subsequently transferred to the family Eodeinopidae. The type species is E. longipes. |
| Eoeuscorpius | Gen. et sp. nov | Valid | Kühl & Lourenço | Eocene | Monte Bolca | Italy | A scorpion, possibly a member of the family Euscorpiidae. Genus includes new species E. ceratoi. |
| Eogamasomorpha hamata | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Tetrablemmidae. |
| ?Eogamasomorpha unicornis | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Tetrablemmidae. Originally described as a possible species of Eogamasomorpha; Wunderlich & Müller (2020) transferred it to the genus Unicornutiblemma. |
| Eomysmauchenius dubius | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A planarchaeid palpimanoid spider. |
| Eoprychia clara | Sp. nov | Valid | Wunderlich | Eocene | Baltic amber | Europe (Baltic Sea coast) | A member of the family Zoropsidae. |
| Furcembolus crassitibia | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Tetrablemmidae. |
| Furcembolus grossa | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Tetrablemmidae. |
| Furcembolus longior | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Tetrablemmidae. |
| Furculoborus | Gen. et sp. nov | Junior synonym | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Uloboridae. The type species is F. patellaris. Wunderlich & Müller (2021) subsequently considered Furculoborus to be a junior synonym of the genus Paramiagrammopes, and transferred F. patellaris to the latter genus. |
| ?Gorgopsina scharffi | Sp. nov | Valid | Wunderlich | Neogene | | Ethiopia | A jumping spider. |
| Hirsutisoma | Fam. Gen. et 3 sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A Ricinulei in the family Hirsutisomidae. Genus includes new species H. acutiformis, H. bruckschi and H. dentata. |
| Kachin | Gen. et 2 sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Uloboridae. Genus includes new species K. fruticosus and K. fruticosoides. |
| Lineaburmops maculatus | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A spider belonging to the family Lagonomegopidae. |
| Longissipalpus cochlea | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A relative of Mongolarachne. |
| Longissithorax | Gen. et sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Tetrablemmidae. The type species is L. myanmarensis. |
| Longithorax | Gen. et sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Tetrablemmidae. The type species is L. furca. |
| Loxoderces | Gen. 3 sp. nov | Junior synonym | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | Originally described as a spider belonging to the family Eopsilodercidae. Genus includes new species L. curvatus, L. longicymbium and L. rectus. Wunderlich & Müller (2020) considered the genus Loxoderces to be a junior synonym of the genus Burmorsolus, though the authors maintained the three named species as distinct species within the latter genus. |
| Maevia eureka | Sp. nov | Valid | Riquelme & Menéndez-Acuña | Miocene | Mexican amber | Mexico | A jumping spider. Originally described as a species of Maevia, but subsequently transferred to the genus Paramaevia. |
| Megeremaeus cretaceous | Sp. nov | Valid | Sidorchuk & Behan-Pelletier | Late Cretaceous (Campanian) | Canadian amber | Canada | A mite belonging to the group Oribatida and the family Megeremaeidae. |
| Mesothelyphonus | Gen. et sp. nov | Valid | Cai & Huang | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A whip scorpion belonging to the family Thelyphonidae and the subfamily Thelyphoninae. The type species is M. parvus. |
| Monooculricinuleus | Gen. et 2 sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of Ricinulei or Opiliones. Genus includes new species M. incisus and M. semiglobosus. |
| Palaeoburmesebuthus longipalpis | Sp. nov | Valid | Lourenço & Rossi | Cretaceous | Burmese amber | Myanmar | A scorpion belonging to the superfamily Buthoidea and the family Palaeoburmesebuthidae. |
| Palaeoleptoneta crus | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Leptonetidae. |
| Palpalpaculla | Gen. et sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Tetrablemmidae. The type species is P. pulcher. |
| Parvithele | Gen. et 2 sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of Mesothelae belonging to the family Parvithelidae. Genus includes new species P. muelleri and P. spinipes. |
| ?Paxillomegops cornutus | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A spider belonging to the family Lagonomegopidae. |
| Pekkachilus | Gen. et sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A spider belonging to the group Araneomorphae and the family Vetiatoridae. The type species is P. vesica. |
| Permomatveevia | Gen. et sp. nov | Valid | Dammann | Permian (Kungurian) | | Russia | A scorpion. The type species is P. perneri. |
| Pholcochyrocer altipecten | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A spider belonging to the family Pholcochyroceridae. |
| Planarchaea oblonga | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A planarchaeid palpimanoid spider. |
| Planarchaea ovata | Sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A planarchaeid palpimanoid spider. Originally described as a species of Planarchaea, but subsequently transferred to the genus Eomysmauchenius. |
| Planimegops | Gen. et sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A spider belonging to the family Lagonomegopidae. The type species is P. parvus. |
| Praearaneus | Gen. et sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A spider belonging to the family Praearaneidae. The type species is P. bruckschi. |
| Praepholcus | Gen. sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A spider belonging to the family Eopsilodercidae. The type species is P. huberi. |
| Priscaleclercera | Gen. et comb. et 2 sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Psilodercidae. Genus includes "Leclercera" longissipes Wunderlich (2012), "Leclercera" spicula Wunderlich (2012), "Leclercera" ellenbergeri Wunderlich (2015) and "Leclercera" sexaculeata Wunderlich (2015), as well as new species P. brevispinae and P. paucispinae. |
| Propterkachin | Gen. et sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Uloboridae. The type species is P. magnoculus. |
| Pseudoeoprychia | Gen. et sp. nov | Valid | Wunderlich | Eocene | Baltic amber | Europe (Baltic Sea coast) | A member of the family Zoropsidae. The type species is P. triplex. |
| Pseudorsolus | Gen. et comb. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of Dysderoidea belonging to the family Plumorsolidae; a new genus for "Burmorsolus" crassus Wunderlich (2015). Wunderlich & Müller (2020) considered the genus Pseudorsolus to be a junior synonym of the genus Burmorsolus, and transferred its sole species back to the genus Burmorsolus. |
| Pulvillothele | Gen. et sp. nov | Valid | Wunderlich | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of Mesothelae belonging to the family Parvithelidae. The type species is P. haupti. |
| Spatiator bitterfeldensis | Sp. nov | Valid | Wunderlich | Eocene | Bitterfeld amber | Germany | A member of Araneomorphae belonging to the family Spatiatoridae. |
| Spinoburmesebuthus | Gen. et sp. nov | Disputed | Lourenço & Velten | Cretaceous | Burmese amber | Myanmar | A scorpion belonging to the superfamily Buthoidea and the family Palaeoburmesebuthidae. Genus includes new species S. pohli. Xuan, Cai & Huang (2023) considered Spinoburmesebuthus to be a junior synonym of the genus Betaburmesebuthus. |

## Crustaceans
### Research

* A study on the identification of sexual morphs and the reproductive system of the Early Cretaceous clam shrimp Eosestheria middendorfii is published by Hethke et al. (2017).
* A study on the Cretaceous clam shrimp Xibeiestheria pora, identifying new taxonomic features, is published by Li (2017).
* Fossil specimen which might be a barnacle nauplius is described from the Upper Jurassic Solnhofen Limestone (Germany) by Nagler et al. (2017).
* Three specimens of zoea-type malacostracan larvae, showing similarities to the larvae of the lobster Nephrops norvegicus, are described from the Late Jurassic Solnhofen limestone (Germany) by Haug & Haug (2017).
* A study on the anatomy of two specimens of Urda rostrata from the Middle Jurassic (Bathonian) of Germany is published by Nagler, Hyžný & Haug (2017), who interpret this species as the oldest fossil parasitic isopod known to date.
* Isolated, small fossils from North America, Europe, Africa and Asia, the oldest of which were recovered from the Oligocene (Chattian) Chickasawhay Limestone (Alabama, United States), are interpreted as remains of alpheid shrimps by Hyžný et al. (2017).
* A redescription of the shrimps Aeger brevirostris and Archeosolenocera straeleni from the Middle Jurassic La Voulte-sur-Rhône Lagerstätte (France) is published by Jauvion, Charbonnier & Bernard (2017), who consider the species Antrimpos secretaniae to be a junior synonym of Archeosolenocera straeleni.
* New fossils of members of the crab genus Cenomanocarcinus, as well as the southernmost record of the species Necrocarcinus woodwardii, are reported from the Cretaceous of Spain by Ossó (2017).
* Claw fragments of the trichodactylid crabs are described from the Eocene and Oligocene Pozo Formation, Oligocene Chambira Formation (Peru) and Miocene Solimões Formation (Brazil) by Klaus et al. (2017), representing the oldest records of the family reported so far.
* A revision of the genus Eryma is published by Devillez & Charbonnier (2017), who consider the genera Protoclytiopsis Birshtein (1958) and Galicia Garassino & Krobicki (2002) to be junior synonyms of the genus Eryma.

### New taxa
#### Malacostracans

| Name | Novelty | Status | Authors | Age | Unit | Location | Notes |
| Alcespina | Gen. et sp. et comb. nov | Valid | Pasini & Garassino | Early Eocene – early Oligocene | Bateque Formation | Italy  Mexico  France? | A crab belonging to the family Raninidae and the subfamily Ranininae. The type species is A. ovadaensis; genus also includes "Ranina" berglundi Squires & Demetrion (1992). |
| Annuntidiogenes massetispinosus | Sp. nov | | Fraaije, Van Bakel & Jagt | Late Cretaceous (Maastrichtian) | Maastricht Formation | Netherlands | A hermit crab. |
| Aquitanoscia | Gen. et 2 sp. nov | Valid | Broly et al. | Miocene | Mexican amber | Mexico | A woodlouse. Genus includes new species A. chiapasensis and A. maternus. |
| Arabicarcinus | Gen. et sp. nov | Valid | Schweitzer & Feldmann | Late Cretaceous | Aruma Formation | Saudi Arabia | A crab belonging to the superfamily Carpilioidea. The type species is A. arumensis. |
| Armacrangon | Gen. et sp. nov | Valid | Charbonnier et al. | Late Cretaceous | | Lebanon | A member of the family Glyphocrangonidae. Genus includes new species A. edwardsi. |
| Asthenognathus alleronensis | Sp. nov | Valid | Pasini, Garassino & De Angeli | Early Pleistocene | | Italy | A member of Varunidae. |
| Aviamysis | Gen. et sp. nov | Valid | San Vicente & Cartanyà | Middle Triassic (Ladinian) | | Spain | A member of the family Mysidae. The type species is A. pinetellensis. |
| Axius hofstedtae | Sp. nov | | Hyžný, Jakobsen & Fraaije | Late Oligocene | | Denmark | A species of Axius. |
| ?Bentheogennema phoenicia | Sp. nov | Valid | Charbonnier et al. | Late Cretaceous | | Lebanon | |
| Bournelyreidus ericksoni | Sp. nov | Valid | Kornecki, Feldmann & Schweitzer | Late Cretaceous (Maastrichtian) | Coon Creek Formation | United States | A lyreidid raninoid crab. |
| Calappa damarcoi | Sp. nov | Valid | Pasini & Garassino | Early Oligocene | | Italy | A species of Calappa. |
| Calliaxina hadjoulaensis | Sp. nov | Valid | Charbonnier et al. | Late Cretaceous (Cenomanian) | | Lebanon | A member of the family Callianassidae. |
| Calocarides arzignanensis | Sp. nov | Valid | De Angeli & Caporiondo | Eocene | | Italy | A member of Axiidea. |
| Carinacaris antennae | Sp. nov | Valid | Charbonnier et al. | Late Cretaceous | | Lebanon | |
| Carinatus | Gen. et sp. nov | Valid | Nyborg et al. | Late Cretaceous (Maastrichtian) | Owl Creek Formation Prairie Bluff Formation | United States | A raninoid crab, probably a member of the family Raninidae and the subfamily Symethinae. Genus includes new species C. galebishopi. |
| Cascolus | Gen. et sp. nov | Valid | Siveter et al. | Silurian (Wenlock) | Herefordshire Konservat-Lagerstätte | United Kingdom | A member of Leptostraca. The type species is C. ravitis. |
| Cenomanocarcinus enodis | Sp. nov | Valid | Schweitzer et al. | Late Cretaceous (Turonian) | Tres Hermanos Formation | United States | |
| Cirolana forticrura | Sp. nov | Valid | Baldanza et al. | Early Pleistocene | | Italy | An isopod, a species of Cirolana. |
| Claudioranina latacantha | Sp. nov | Valid | Martínez-Díaz et al. | Paleocene (Selandian) | Rancho Nuevo Formation | Mexico | A raninid crab. |
| Cretalamoha | Gen. et sp. nov | Valid | Nyborg & Garassino | Late Cretaceous (Campanian) | Pender Formation | Canada | A member of Homolidae. The type species is C. boweni. Announced in 2017; validated in 2023. |
| Cretaxiopsis | Gen. et sp. nov | Valid | Charbonnier et al. | Late Cretaceous (Cenomanian) | | Lebanon | A member of the family Axiidae. Genus includes new species C. libanotica. |
| Daenerytanais | Gen. et sp. nov | Valid | Sánchez-García et al. | Late Cretaceous (Cenomanian) | | France | A member of Tanaidacea belonging to the family Alavatanaidae. The type species is D. maieuticus. |
| Delyrius | Gen. et sp. nov | Valid | Schweitzer et al. | Late Cretaceous (Turonian) | Tres Hermanos Formation | United States | A crab belonging to the family Lyreididae. Genus includes new species D. carthagensis. |
| Diogenicheles horstkuscheli | Sp. nov | Valid | Fraaije, Schweigert & van Bakel | Late Jurassic (Kimmeridgian) | | Germany | A hermit crab. |
| Distolambrus rasnus | Sp. nov | Valid | Baldanza et al. | Early Pleistocene | | Italy | A crab belonging to the family Parthenopidae. |
| Dromilites belli | Sp. nov | Valid | Van Bakel et al. | Eocene (Ypresian) | London Clay | United Kingdom | A crab belonging to the family Dromiidae. |
| Dusa reschi | Sp. nov | Valid | Winkler | Late Jurassic (Tithonian) | Solnhofen limestone | Germany | A member of Penaeidae. |
| Echinocaris bisulcata | Sp. nov | Valid | Broda, Collette & Budil | Late Devonian | | Poland | A member of Phyllocarida. |
| Eoacantholobulus | Gen. et sp. nov | Junior synonym | Ossó & Domínguez | Eocene (Priabonian) | | Spain | A crab belonging to the family Panopeidae. Genus includes new species E. oscensis. Ossó et al. (2020) subsequently transferred E. oscensis to the genus Sculptoplax. |
| Eohepatella | Gen. et sp. nov | Valid | Beschin & De Angeli | Eocene (Lutetian) | | Italy | A crab belonging to the family Aethridae. The type species is E. plana. |
| Eomaldivia lessinea | Sp. nov | Valid | De Angeli & Ceccon | Eocene (Ypresian) | | Italy | A crab belonging to the family Trapeziidae. |
| Eonomus | Gen. et sp. nov | Valid | Nyborg, Garassino & Slak | Eocene | Llajas Formation | United States | A crab belonging to the family Cymonomidae. Genus includes new species E. californianus. |
| Eopaguropsis blausteinensis | Sp. nov | Valid | Fraaije, Schweigert & van Bakel | Late Jurassic (Kimmeridgian) | | Germany | A hermit crab. |
| Epipenaeus | Gen. et sp. nov | Valid | Charbonnier et al. | Late Cretaceous | | Lebanon | A member of the family Carpopenaeidae. Genus includes new species E. abisaadorum. |
| Eryma oscari | Sp. nov | Valid | Charbonnier et al. | Late Cretaceous | | Lebanon | |
| Eurynome italica | Sp. nov | Valid | Baldanza et al. | Early Pleistocene | | Italy | A spider crab. |
| Galathea caporiondoi | Sp. nov | Valid | De Angeli & Ceccon | Eocene (Ypresian) | | Italy | A species of Galathea. |
| Gladicrangon | Gen. et sp. nov | Valid | Charbonnier et al. | Late Cretaceous | | Lebanon | A member of the family Glyphocrangonidae. Genus includes new species G. coriacea. |
| Ibacus? mazariorum | Sp. nov | Valid | Audo | Eocene (Ypresian) | Ghazij Formation | Pakistan | A slipper lobster belonging to the subfamily Ibacinae, possibly a species of Ibacus. |
| Joinvilleicaris | Gen. et sp. nov | Valid | Charbonnier et al. | Late Cretaceous | | Lebanon | A member of the family Penaeidae. Genus includes new species J. longirostris. |
| Juglocarcinus | Gen. et sp. nov | Valid | Garvie, Collins & Mellish | Early Cretaceous (Albian) | Upper Walnut Clay Formation | United States | A crab belonging to the group Raninoida and the superfamily Palaeocorystoidea. The type species is J. tumulus. |
| Lessinipagurus ornatus | Sp. nov | Valid | De Angeli & Caporiondo | Eocene (Lutetian) | | Italy | A hermit crab belonging to the family Xylopaguridae. |
| Lessinipagurus planus | Sp. nov | Valid | De Angeli & Caporiondo | Eocene (Lutetian) | | Italy | A hermit crab belonging to the family Xylopaguridae. |
| Leucosiraja | Gen. et sp. nov | Valid | Baldanza et al. | Early Pleistocene | | Italy | A crab belonging to the family Leucosiidae. Genus includes new species L. manta. |
| Libanoaxius | Gen. et sp. nov | Valid | Charbonnier et al. | Late Cretaceous | | Lebanon | A member of the family Axiidae. Genus includes new species L. beatae. |
| Libanocaris curvirostra | Sp. nov | Valid | Charbonnier et al. | Late Cretaceous | | Lebanon | |
| Linuparus keyesi | Sp. nov | Valid | Kornecki, Feldmann & Schweitzer | Late Cretaceous (Maastrichtian) | Coon Creek Formation | United States | A spiny lobster, a species of Linuparus. |
| Linuparus secretanae | Sp. nov | Valid | Charbonnier et al. | Late Cretaceous (Cenomanian) | | Lebanon | A species of Linuparus. |
| Llajassus | Gen. et comb. nov | Valid | Nyborg & Garassino | Eocene | Llajas Formation Lookingglass Formation | United States | A slipper lobster; a new genus for "Parribacus" caesius Squires (2001). |
| Longipaguristes | Gen. et sp. et comb. nov | Valid | De Angeli & Caporiondo | Eocene | | Italy | A hermit crab belonging to the family Diogenidae. The type species is L. manuelae; genus also includes "Paguristes" extentus Beschin et al. (2007). |
| Longodromites akainokkos | Sp. nov | Valid | Schweitzer et al. | Late Jurassic | | Romania | A crab belonging to the family Longodromitidae. |
| Macropenaeus sidiaichensis | Sp. nov | Valid | Boukhalfa et al. | Early Cretaceous (Barremian) | Sidi Aïch Formation | Tunisia | |
| Magila cretacica | Sp. nov | Valid | Charbonnier et al. | Late Cretaceous | | Lebanon | A member of the family Axiidae. |
| Mecochirus bartholomaii | Sp. nov | Valid | Jell, Woods & Cook | Early Cretaceous (late Aptian) | | Australia | Charbonnier et al. (2021) transferred this species to the genus Meyeria. |
| Mecochirus lanceolatus | Sp. nov | Valid | Jell, Woods & Cook | Early Cretaceous (late Aptian) | | Australia | |
| Mecochirus mcclymontorum | Sp. nov | Valid | Jell, Woods & Cook | Early Cretaceous (late Aptian) | | Australia | |
| Merocryptus viperinus | Sp. nov | Valid | Baldanza et al. | Early Pleistocene | | Italy | A crab belonging to the family Leucosiidae. |
| Mizunotengus | Gen. et sp. nov | Valid | Karasawa & Ando in Karasawa et al. | Early Miocene | Yamami Formation | Japan | A member of Galatheoidea belonging to the family Munidopsidae. The type species is M. makiguchimai. |
| Montecaris marynowskii | Sp. nov | Valid | Broda, Collette & Budil | Late Devonian | | Poland | A member of Phyllocarida. |
| Montemagrelisthes | Gen. et sp. nov | Valid | De Angeli & Ceccon | Eocene (Ypresian) | | Italy | A porcelain crab. The type species is M. prealpinus. |
| Notahomarus | Gen. et comb. nov | Valid | Charbonnier et al. | Late Cretaceous | | Lebanon | A lobster. Genus includes "Pseudastacus" hakelensis Fraas (1878). |
| Odontochelion bicarinatum | Sp. nov | Valid | Charbonnier et al. | Late Cretaceous | | Lebanon | A member of the family Crangonidae. |
| Ommatocarcinus occidentalis | Sp. nov | Valid | Baldanza et al. | Early Pleistocene | | Italy | A crab belonging to the family Goneplacidae. |
| Orbispagurus | Gen. et sp. nov | Valid | De Angeli & Caporiondo | Eocene (Lutetian) | | Italy | A hermit crab belonging to the family Xylopaguridae. The type species is O. tessellatus. |
| Palaega johannschoberti | Sp. nov | Valid | Keupp & Mahlow | Early Jurassic (Pliensbachian) | | Germany | An isopod belonging to the family Cirolanidae. |
| Palaeobenthonectes | Gen. et comb. nov | Valid | Charbonnier et al. | Late Cretaceous | | Lebanon | A member of the family Benthesicymidae. Genus includes "Penaeus" arambourgi Roger (1946). |
| Palaeopandalus | Gen. et sp. nov | Valid | Charbonnier et al. | Late Cretaceous | | Lebanon | A member of the family Pandalidae. Genus includes new species P. komaii. |
| Paguristes cecconi | Sp. nov | Valid | De Angeli & Caporiondo | Eocene (Lutetian) | | Italy | A hermit crab belonging to the family Diogenidae, a species of Paguristes. |
| Paguristes clampensis | Sp. nov | Valid | De Angeli & Caporiondo | Eocene (Lutetian) | | Italy | A hermit crab belonging to the family Diogenidae, a species of Paguristes. |
| Pagurus mainensis | Sp. nov | Valid | De Angeli & Caporiondo | Eocene (Lutetian) | | Italy | A hermit crab belonging to the family Paguridae, a species of Pagurus. |
| Palaeognathophausia | Gen. et sp. nov | Valid | Charbonnier et al. | Late Cretaceous | | Lebanon | A member of the family Gnathophausiidae. Genus includes new species P. libanotica. |
| Palaeopalinurus czarnieckii | Sp. nov | | Krobicki & Fraaije | Late Jurassic (Tithonian) | | Poland | A spiny lobster. |
| Palinurus teruzzii | Sp. nov | Valid | Charbonnier et al. | Late Cretaceous (Cenomanian) | | Lebanon | A species of Palinurus. |
| Paralithodes bishuensis | Sp. nov | Valid | Karasawa & Ando in Karasawa et al. | Early Miocene | Yamami Formation | Japan | A king crab, a species of Paralithodes. |
| Paromola roseburgensis | Sp. nov | Valid | Nyborg & Garassino | Early Eocene | Roseburg Formation | United States | A member of Homolidae. Announced in 2017; validated in 2023. |
| Phalangiopsis | Gen. et 2 sp. nov | Valid | Charbonnier et al. | Late Cretaceous | | Lebanon | A member of the family Chirostylidae. Genus includes new species P. antoinei and P. rogeri. |
| Planoprosopon conspicuus | Sp. nov | Valid | Schweitzer et al. | Late Jurassic | | Romania | A crab belonging to the family Longodromitidae. |
| Porcellana thomasi | Sp. nov | Valid | De Angeli & Ceccon | Eocene (Ypresian) | | Italy | A porcelain crab, a species of Porcellana. |
| Proticalia | Nom. nov | Valid | De Angeli & Ceccon | Eocene (Ypresian) | | Italy | A crab belonging to the family Domeciidae; a replacement name for Tropicalia Beschin et al. (2016). |
| Protonecrocarcinus tuberosus | Sp. nov | Valid | Schweitzer et al. | Late Cretaceous (Turonian) | Tres Hermanos Formation | United States | |
| Proxilianira | Gen. et sp. et comb. nov | Valid | De Angeli & Ceccon | Eocene (Priabonian) | | Italy | A crab belonging to the family Raninidae and the subfamily Notopodinae. The type species is P. albertii. |
| Psammionassa | Gen. et sp. nov | Valid | Schweitzer et al. | Late Cretaceous (Turonian) | Tres Hermanos Formation | United States | A member of the family Callianassidae. Genus includes new species P. paromola. |
| Pseudodrobna | Gen. et sp. nov | Valid | Winkler | Late Jurassic (Tithonian) | Solnhofen limestone | Germany | A member of Penaeidae. The type species is P. kenngotti. |
| Pseudoranina | Gen. et sp. nov | Valid | Charbonnier et al. | Late Cretaceous (Santonian) | | Lebanon | A crab, possibly a member of the family Raninidae. Genus includes new species P. guinotae. |
| Ramacarcinus | Nom. nov | Valid | De Angeli & Ceccon | Eocene (Ypresian) | | Italy | A crab belonging to the family Cancridae; a replacement name for Rama Beschin et al. (2016). |
| Rogeryon | Gen. et comb. nov | Valid | Audo et al. | Late Jurassic (Tithonian) | Solnhofen Limestone | Germany | A member of Eryonoidea of uncertain phylogenetic placement; a new genus for "Eryon" oppeli Woodward (1866). |
| Scyllarella manleyi | Sp. nov | Valid | Feldmann & Schweitzer | Eocene (Ypresian–Lutetian) | Lookingglass Formation | United States | A slipper lobster. |
| Sodakus grethi | Sp. nov | Valid | Schweitzer et al. | Late Cretaceous (Turonian) | Tres Hermanos Formation | United States | |
| Tauricheles | Gen. et comb. nov | Valid | Audo, Charbonnier & Krobicki | Jurassic (Toarcian–Aalenian) | | Crimean Peninsula | A member of the family Polychelidae; a new genus for "Palaeopolycheles" crymensis Levitski (1974). |
| Tavernolesia | Gen. et comb. nov | Valid | Artal & Onetti | Eocene (Lutetian) | | Spain | A crab belonging to the group Calappoidea. Genus includes "Stenodromia" calasanctii Via (1959) |
| Tethysmunida | Gen. et sp. et comb. nov | Valid | De Angeli & Ceccon | Eocene (Ypresian) | | Italy | A member of the family Munididae or Munidopsidae. The type species is T. corallina; genus might also include "Faxegalathea" valeccensis Beschin et al. (2016). |
| Woodwardicheles | Gen. et comb. nov | Valid | Audo, Charbonnier & Krobicki | Early Cretaceous (Valanginian) | | Czech Republic | A member of the family Polychelidae; a new genus for "Eryon" neocomiensis Woodward (1881). |
| Yunnanocopia | Gen. et 2 sp. nov | Valid | Feldmann et al. | Middle Triassic (Anisian) | | China | A member of Lophogastrida. Genus includes new species Y. grandis and Y. longicauda. |

#### Ostracods

| Name | Novelty | Status | Authors | Age | Unit | Location | Notes |
| Acanthoscapha mersinella | Sp. nov | Valid | Forel in Forel et al. | Late Triassic (Carnian) | | Turkey | Originally described as a species of Acanthoscapha, but subsequently transferred to the genus Kozuria. |
| Acratia chongpani | Sp. nov | Valid | Chitnarin in Chitnarin et al. | Early and Middle Permian | Pha Nok Khao Formation Tak Fa Formation | Greece  Thailand | A member of the family Acratiidae. |
| Acratia kollmanni | Sp. nov | Valid | Forel in Forel et al. | Late Triassic (Carnian) | | Turkey | A member of Podocopida belonging to the superfamily Bairdioidea and the family Acratiidae. |
| Acratia mongkoli | Sp. nov | Valid | Chitnarin in Chitnarin et al. | Early and Middle Permian | Pha Nok Khao Formation Tak Fa Formation | Greece  Thailand | A member of the family Acratiidae. |
| Arcuaria hebukesarensis | Sp. nov | Valid | Song, Crasquin & Gong | Late Devonian | | China | |
| Bairdia fontainei | Sp. nov | Valid | Chitnarin in Chitnarin et al. | Early and Middle Permian | Pha Nok Khao Formation Tak Fa Formation | Thailand | A member of the family Bairdiidae. |
| Bairdia songthami | Sp. nov | Valid | Chitnarin in Chitnarin et al. | Permian | Nam Maholan Formation Pha Nok Khao Formation Tak Fa Formation | Serbia  Thailand | A member of the family Bairdiidae. |
| Bairdia hugluensis | Sp. nov | Valid | Forel in Forel et al. | Late Triassic (Carnian) | | Turkey | A member of Podocopida belonging to the superfamily Bairdioidea and the family Bairdiidae. |
| Bairdia incisedorsa | Sp. nov | Valid | Chitnarin in Chitnarin et al. | Middle Permian | Tak Fa Formation | Thailand | A member of the family Bairdiidae. |
| Bairdia khaokanaensis | Sp. nov | Valid | Chitnarin in Chitnarin et al. | Early Permian | Pha Nok Khao Formation | Thailand | A member of the family Bairdiidae. |
| Bairdia shaerbuertiensis | Sp. nov | Valid | Song, Crasquin & Gong | Late Devonian | | China | |
| Bairdia songthami | Sp. nov | Valid | Chitnarin in Chitnarin et al. | Early and Middle Permian | Pha Nok Khao Formation Tak Fa Formation | Thailand | A member of the family Bairdiidae. |
| Bairdoppilata barreirinhensis | Sp. nov | Valid | Santos in Santos Filho, Fauth & Piovesan | Cretaceous (Aptian-middle Coniacian) | Barreirinhas Basin Florianópolis Formation Guarujá Formation | Brazil | A member of Bairdiidae. |
| Baschkirina ruchae | Sp. nov | Valid | Chitnarin in Chitnarin et al. | Early Permian | Nam Maholan Formation Pha Nok Khao Formation | Thailand | A member of the family Acratiidae. |
| Basslerella naresi | Sp. nov | Valid | Chitnarin in Chitnarin et al. | Early Permian | Nam Maholan Formation Tak Fa Formation | Thailand | A member of the family Cytherideidae. |
| Basslerella wipanuae | Sp. nov | Valid | Chitnarin in Chitnarin et al. | Early Permian | Pha Nok Khao Formation Tak Fa Formation | Thailand | A member of the family Cytherideidae. |
| Bollia sinitsae | Sp. nov | Valid | Melnikova | Middle Ordovician | Nalednyi Formation | Russia | |
| Bungonibeyrichia copelandi | Sp. nov | Valid | Camilleri, Warne & Holloway | Silurian–Devonian | | Australia | |
| Bythoceratina subumbonata | Sp. nov | Valid | Yamaguchi, Matsui & Nishi | Paleocene | | Atlantic Ocean floor off the coast of Canada | |
| Bythoceratina wilsoni | Sp. nov | Valid | Yamaguchi, Matsui & Nishi | Paleocene | | Atlantic Ocean floor off the coast of Canada | |
| Camptocythere (Camptocythere) angustius | Sp. nov | Valid | Tesakova & Shurupova | Middle Jurassic (Bajocian) | | Russia | A member of Podocopida belonging to the family Progonocytheridae. |
| Camptocythere (Camptocythere) lateres | Sp. nov | Valid | Tesakova & Shurupova | Middle Jurassic (Bajocian and Bathonian) | | Russia | A member of Podocopida belonging to the family Progonocytheridae. |
| Candona averta | Sp. nov | Valid | Forester et al. | Late Quaternary | | United States | A member of Candonidae. |
| Candona cerca | Sp. nov | Valid | Forester et al. | Late Quaternary | | United States | A member of Candonidae. |
| Candona corncreekensis | Sp. nov | Valid | Forester et al. | Late Quaternary | | United States | A member of Candonidae. |
| Candona coyotespringensis | Sp. nov | Valid | Forester et al. | Late Quaternary | | United States | A member of Candonidae. |
| Candona mojavensis | Sp. nov | Valid | Forester et al. | Late Quaternary | | United States | A member of Candonidae. |
| Candona pahrumpensis | Sp. nov | Valid | Forester et al. | Late Quaternary | | United States | A member of Candonidae. |
| Caspiocypris basilicii | Sp. nov | Valid | Spadi, Gliozzi & Medici | Plio–Pleistocene | | Italy | A member of the subfamily Candoninae. |
| Caspiocypris perusia | Sp. nov | Valid | Spadi, Gliozzi & Medici | Plio–Pleistocene | | Italy | A member of the subfamily Candoninae. |
| Caspiocypris posteroacuta | Sp. nov | Valid | Spadi, Gliozzi & Medici | Plio–Pleistocene | | Italy | A member of the subfamily Candoninae. |
| Caspiocypris tiberina | Sp. nov | Valid | Spadi, Gliozzi & Medici | Plio–Pleistocene | | Italy | A member of the subfamily Candoninae. |
| Caspiocypris tuderis | Sp. nov | Valid | Spadi, Gliozzi & Medici | Plio–Pleistocene | | Italy | A member of the subfamily Candoninae. |
| Cherskiella baikalica | Sp. nov | Valid | Melnikova | Middle Ordovician | Nalednyi Formation | Russia | |
| Citrella? carniana | Sp. nov | Valid | Forel in Forel et al. | Late Triassic (Carnian) | | Turkey | A member of Podocopida belonging to the superfamily Cytheroidea and the family Cytheruridae. |
| Compositocostata | Gen. et sp. nov | Valid | Sobolev | Carboniferous (Tournaisian) | | Russia | A member of Podocopida belonging to the family Bythocytheridae. Genus includes new species C. cumina. |
| Cribroconcha honggulelengensis | Sp. nov | Valid | Song, Crasquin & Gong | Late Devonian | | China | |
| Croninocythereis clavae | Sp. nov | Valid | Yamaguchi, Matsui & Nishi | Paleocene (Thanetian) | | Atlantic Ocean floor off the coast of Canada | A member of the family Trachyleberididae. |
| Cypria kempfi | Sp. nov | Valid | Keyser & Friedrich | Eocene | | Germany | A species of Cypria known from Baltic amber. |
| Cypridea gujialingensis | Sp. nov | Valid | Wang et al. | Early Cretaceous | | China | A species of Cypridea. |
| Cyprideis amaru | Sp. nov | Valid | Martínez-García et al. | Miocene | | Ecuador | |
| Cyprideis lojaensis | Sp. nov | Valid | Martínez-García et al. | Miocene | | Ecuador | |
| Cyprideis pachamama | Sp. nov | Valid | Martínez-García et al. | Miocene | | Ecuador | |
| Cyprideis petersonae | Sp. nov | Valid | Martínez-García et al. | Miocene | | Ecuador | |
| Cyprideis tumi | Sp. nov | Valid | Martínez-García et al. | Miocene | | Ecuador | |
| Cypris whatleyi | Sp. nov | Valid | Khosla, Rathore & Nagori | Miocene | | Nepal | A member of the family Cyprididae. |
| Cytherella ventercavus | Sp. nov | Valid | Santos Filho, Fauth & Piovesan | Late Cretaceous (Turonian-middle Coniacian) | Barreirinhas Basin | Brazil | A member of Cytherellidae. |
| Cytherelloidea awaldaensis | Sp. nov | Valid | Chaudhary, Nagori & Bhanat | Late Cretaceous | Bagh Formation | India | A member of the family Cytherellidae. |
| Cytherelloidea rosebaidaensis | Sp. nov | Valid | Chaudhary, Nagori & Bhanat | Late Cretaceous | Bagh Formation | India | A member of the family Cytherellidae. |
| Cytheropteron americanum | Sp. nov | Valid | Yamaguchi, Matsui & Nishi | Paleocene | | Atlantic Ocean floor off the coast of Canada | |
| Cytheropteron nasutum | Sp. nov | Valid | Yasuhara, Hunt & Okahashi | Late Quaternary | | Pacific Ocean (Shatsky Rise) | A member of Podocopida belonging to the superfamily Cytheroidea and the family Cytheruridae. |
| Cytheropteron newfoundlandense | Sp. nov | Valid | Yamaguchi, Matsui & Nishi | Paleocene | | Atlantic Ocean floor off the coast of Canada | |
| Cytheropteron? schornikovi | Sp. nov | Valid | Forel in Forel et al. | Late Triassic (Carnian) | | Turkey | A member of Podocopida belonging to the superfamily Cytheroidea and the family Cytheruridae. |
| Dolerocypria? robinsmithi | Sp. nov | Valid | Matzke-Karasz et al. | Miocene (Aquitanian | La Quinta Formation (Mexican amber) | Mexico | A member of the family Candonidae. |
| Editella glyptopleuraformis | Sp. nov | Valid | Sobolev | Carboniferous (Tournaisian) | | Russia | A member of Podocopida belonging to the family Editiidae. |
| Edithobairdia | Gen. et comb. nov | Valid | Forel in Forel et al. | Late Triassic (Carnian) | | Italy  Turkey | A member of Podocopida belonging to the superfamily Bairdioidea and the family Bairdiidae. The type species is E. polyacantha (Kristan-Tollmann, 1978). |
| Egorovellina (?) shuvalovae | Sp. nov | Valid | Melnikova | Middle Ordovician | Nalednyi Formation | Russia | |
| Eucytherura lacerata | Sp. nov | Valid | Forel in Forel et al. | Late Triassic (Carnian) | | Turkey | A member of Podocopida belonging to the superfamily Cytheroidea and the family Cytheruridae. |
| Eucytherura macropora pygmaea | Subsp. nov | Valid | Ohmert | Oligocene | Middle Pechelbronn Formation | Germany | |
| Fabalicypris hathaithipae | Sp. nov | Valid | Chitnarin in Chitnarin et al. | Early Permian | Pha Nok Khao Formation Tak Fa Formation | Thailand | A member of the family Bairdiidae. |
| Gencella | Gen. et sp. nov | Valid | Forel in Forel et al. | Late Triassic (Carnian) | | Turkey | A member of Podocopida belonging to the superfamily Bairdioidea and the family Beecherellidae. The type species is G. taurensis. |
| Glandites planus | Sp. nov | Valid | Melnikova | Middle Ordovician | Nalednyi Formation | Russia | |
| Gontiella | Gen. et sp. nov | Valid | Melnikova | Middle Ordovician | Nalednyi Formation | Russia | Genus includes new species G. mira. |
| Hallatina opima | Sp. nov | Valid | Melnikova | Middle Ordovician | Nalednyi Formation | Russia | |
| Hammatocythere oertlii tarda | Subsp. nov | Valid | Ohmert | Oligocene | Middle Pechelbronn Formation | Germany | |
| Hammatocythere xenae | Sp. nov | Valid | Ohmert | Oligocene | Middle Pechelbronn Formation | Germany | |
| Heterocypris ballentae | Sp. nov | Valid | Martínez-García et al. | Miocene | | Ecuador | |
| Hollinella (Hollinella) lungcamensis | Sp. nov | Valid | Crasquin in Crasquin et al. | Latest Permian and earliest Triassic | Hong Ngai Formation | Vietnam | A member of Palaeocopida belonging to the family Hollinellidae. |
| Kerocythere dorsidenticulata | Sp. nov | Valid | Forel in Forel et al. | Late Triassic (Carnian) | | Turkey | A member of Podocopida belonging to the superfamily Cytheroidea and the family Cytheruridae. |
| Kerocythere tricostata | Sp. nov | Valid | Forel in Forel et al. | Late Triassic (Carnian) | | Turkey | A member of Podocopida belonging to the superfamily Cytheroidea and the family Cytheruridae. |
| Legitimocythere stellae | Sp. nov | Valid | Yasuhara, Hunt & Okahashi | Late Quaternary | | Pacific Ocean (Shatsky Rise) | A member of Podocopida belonging to the superfamily Cytheroidea and the family Trachyleberididae. |
| Leperditella nalednaya | Sp. nov | Valid | Melnikova | Middle Ordovician | Nalednyi Formation | Russia | |
| Liuzhinia naramasei | Sp. nov | Valid | Chitnarin in Chitnarin et al. | Early Permian | Pha Nok Khao Formation Tak Fa Formation | Thailand | A member of the family Acratiidae. |
| Microchelinella bulongourensis | Sp. nov | Valid | Song, Crasquin & Gong | Late Devonian | | China | |
| Microchelinella hoxtolgayensis | Sp. nov | Valid | Song, Crasquin & Gong | Late Devonian | | China | |
| Monoceratina praevulsaformis | Sp. nov | Valid | Forel in Forel et al. | Late Triassic (Carnian) | | Turkey | A member of Podocopida belonging to the superfamily Cytheroidea and the family Bythocytheridae. |
| Nemoceratina (Pariceratina) guerneti | Sp. nov | Valid | Yamaguchi, Matsui & Nishi | Paleocene | | Atlantic Ocean floor off the coast of Canada | |
| Paralimnocythere umbra | Sp. nov | Valid | Spadi, Gliozzi & Medici | Plio–Pleistocene | | Italy | A member of the subfamily Limnocytherinae. |
| Parapontoparta lagranjae | Sp. nov | Valid | Matzke-Karasz et al. | Miocene (Aquitanian | La Quinta Formation (Mexican amber) | Mexico | A member of the family Candonidae. |
| Patellacythere tourkosella | Sp. nov | Valid | Forel in Forel et al. | Late Triassic (Carnian) | | Turkey | A member of Podocopida belonging to the superfamily Cytheroidea and the family Bythocytheridae. |
| Petasobairdia campbelli | Sp. nov | Valid | Chitnarin in Chitnarin et al. | Early and Middle Permian | Tak Fa Formation | Thailand  United States | A member of the family Bairdiidae. |
| Phacorhabdotus flabellicarinus | Sp. nov | Valid | Yamaguchi, Matsui & Nishi | Late Cretaceous (Maastrichtian) to early Eocene | | North Atlantic Ocean | A member of the family Trachyleberididae. |
| Plicocandona | Gen. et 5 sp. nov | Valid | Forester et al. | Late Quaternary | | United States | A member of Candonidae. The type species is P. valentis; genus also includes P. cassicula, P. macraina, P. sagena and P. striola. |
| Polycope kilekensis | Sp. nov | Valid | Forel in Forel et al. | Late Triassic (Carnian) | | Turkey | A member of the family Polycopidae. |
| Poseidonamicus norrisi | Sp. nov | Valid | Yamaguchi, Matsui & Nishi | Middle and late Paleocene | | North Atlantic Ocean | A member of the family Thaerocytheridae. |
| Poseidonamicus shatskyensis | Sp. nov | Valid | Yasuhara, Hunt & Okahashi | Late Quaternary | | Pacific Ocean (Shatsky Rise) | A member of Podocopida belonging to the superfamily Cytheroidea and the family Thaerocytheridae. |
| Potamocypris nepalensis | Sp. nov | Valid | Khosla, Rathore & Nagori | Miocene | | Nepal | A species of Potamocypris |
| Potiguarella maranhensis | Sp. nov | Valid | Santos Filho, Fauth & Piovesan | Late Cretaceous (Turonian-middle Coniacian) | Barreirinhas Basin | Brazil | A member of Trachyleberididae. |
| Pribylites junggarensis | Sp. nov | Valid | Song, Crasquin & Gong | Late Devonian | | China | |
| Pribylites wulankeshunensis | Sp. nov | Valid | Song, Crasquin & Gong | Late Devonian | | China | |
| Primitia kalarensis | Sp. nov | Valid | Melnikova | Middle Ordovician | Nalednyi Formation | Russia | |
| Ptychobairdia praekristanae | Sp. nov | Valid | Forel in Forel et al. | Late Triassic (Carnian) | | Turkey | A member of Podocopida belonging to the superfamily Bairdioidea and the family Bairdiidae. |
| Rossicuvillierina | Nom. nov | Valid | Brandão | Pleistocene | | Argentina | A member of Podocopida belonging to the family Hemicytheridae; a replacement name for Cuvillierina Rossi de García (1972). |
| Ryugucivis blumi | Sp. nov | Valid | Yamaguchi, Matsui & Nishi | Paleocene (Danian and Selandian) | | Atlantic Ocean floor off the coast of Canada | A member of the family Trachyleberididae. |
| Serrocytheridea witti | Sp. nov | Valid | Ohmert | Oligocene | Middle Pechelbronn Formation | Germany | |
| Silenites sureeae | Sp. nov | Valid | Chitnarin in Chitnarin et al. | Early and Middle Permian | Nam Maholan Formation Pha Nok Khao Formation Tak Fa Formation | Thailand | A member of the family Bairdiidae. |
| Simeonella daginikella | Sp. nov | Valid | Forel in Forel et al. | Late Triassic (Carnian) | | Turkey | A member of Podocopida belonging to the superfamily Cytheroidea and the family Limnocytheridae. |
| Spinomicrocheilinella reliquiaella | Sp. nov | Valid | Forel in Forel et al. | Late Triassic (Carnian) | | Turkey | A member of Podocopida belonging to the superfamily Sigillioidea and the family Microcheilinellidae. |
| Strumibythere simplex | Sp. nov | Valid | Sobolev | Carboniferous (Tournaisian) | | Russia | A member of Podocopida belonging to the family Bythocytheridae. |
| Thalassocypria cumangulus | Sp. nov | Valid | Matzke-Karasz et al. | Miocene (Aquitanian | La Quinta Formation (Mexican amber) | Mexico | A member of the family Candonidae. |
| Thalassocypria electri | Sp. nov | Valid | Matzke-Karasz et al. | Miocene (Aquitanian | La Quinta Formation (Mexican amber) | Mexico | A member of the family Candonidae. |
| Thalassocypria nicokaraszi | Sp. nov | Valid | Matzke-Karasz et al. | Miocene (Aquitanian | La Quinta Formation (Mexican amber) | Mexico | A member of the family Candonidae. |
| Thalassocypria resinae | Sp. nov | Valid | Matzke-Karasz et al. | Miocene (Aquitanian | La Quinta Formation (Mexican amber) | Mexico | A member of the family Candonidae. |
| Trachyleberidea cronini | Sp. nov | Valid | Yamaguchi, Matsui & Nishi | Early Paleocene to late Oligocene | | Atlantic Ocean  Spain | A member of the family Trachyleberididae. |
| Triassocythere tavuscayiriensis | Sp. nov | Valid | Forel in Forel et al. | Late Triassic (Carnian) | | Turkey | A member of Podocopida belonging to the superfamily Cytheroidea and the family Bythocytheridae. |
| Zonocypris curvicostata | Sp. nov | Valid | Khosla, Rathore & Nagori | Miocene | | Nepal | A member of the family Cyprididae. |

#### Other crustaceans

| Name | Novelty | Status | Authors | Age | Unit | Location | Notes |
| Estherites? jocelynae | Sp. nov | Valid | Stigall, Plotnick & Park Boush | Early Oligocene | Medicine Lodge Formation | United States | A clam shrimp belonging to the superfamily Estheriteoidea. |
| Liaoxiestheria | Gen. et sp. nov | Valid | Liao, Shen & Huang | Middle–Late Jurassic | Linglongta beds | China | A clam shrimp. The type species is L. linglongtaensis. |
| Litholepas | Gen. et sp. nov | Valid | Nagler et al. | Late Jurassic | | Germany | A goose barnacle belonging to the family Eolepadidae. Genus includes new species L. klausreschi. |
| Ordosestheria chottsensis | Sp. nov | Valid | Li et al. | Early Cretaceous (early Barremian) | Bouhedma Formation | Tunisia | A clam shrimp. |
| Punctatestheria | Gen. et 2 sp. et comb. nov | Valid | Zhang et al. | Jurassic | Badaowan Formation Qiketai Formation | China  United Kingdom | A clam shrimp. The type species is P. lianmuqinensis; genus also includes new species P. karamayensis, as well as "Euestheria" trotternishensis Chen & Hudson (1991). |
| Rossolimnadiopsis hanskerpi | Sp. nov | Valid | Scholze et al. | Early Triassic | Ma'in Formation | Jordan | A clam shrimp. |
| Surreyestheria | Gen. et sp. nov | Valid | Liao et al. | Early Cretaceous (Barremian) | Upper Weald Clay Formation | United Kingdom | A clam shrimp belonging to the family Afrograptidae. The type species is S. ockleyensis. |
| Yunnanocyclus | Gen. et sp. nov | Valid | Feldmann et al. | Middle Triassic (Anisian) | Guanling Formation | China | A member of Cyclida. Genus includes new species Y. nodosus. |

## Trilobites
### Research

* Three specimens of Megistaspis (Ekeraspis) hammondi preserving appendages and digestive tract are described from the Ordovician Fezouata Konservat-Lagerstätte (Morocco) by Gutiérrez-Marco et al. (2017).
* A moulted specimen of Telephina intermedia with one of the compound eyes showing traces of serious damage which has healed is described from the Ordovician (Darriwilian) Elnes Formation (Norway) by Schoenemann, Clarkson & Høyberget (2017).
* Eggs preserved with two specimens of Triarthrus eatoni are described from the Ordovician Lorraine Group (upstate New York, United States) by Hegna, Martin & Darroch (2017).
* Extraordinarily preserved appendages of the metadoxidid species Hongshiyanaspis yiliangensis are described from the Cambrian Hongjingshao Formation (Yunnan, China) by Zeng et al. (2017).
* Digestive structures of two species of Cambrian trilobites from China (Palaeolenus lantenoisi and Redlichia mansuyi) are described by Hopkins et al. (2017).
* Remnants of cellular systems are identified in the compound eye of Schmidtiellus reetae from the Cambrian of Estonia by Schoenemann, Pärnaste & Clarkson (2017).

### New taxa

| Name | Novelty | Status | Authors | Age | Unit | Location | Notes |
| Adrisiops | Gen. et sp. et comb. nov | Valid | Van Viersen, Holland & Koppka | Devonian (late Emsian to Eifelian) | El Otfal Formation | Algeria  Morocco | A member of Phacopidae. The type species is A. weugi; genus also includes "Phacops" boudjemaai Khaldi et al. (2016) and "Geesops" fabrei Khaldi et al. (2016). |
| Agraulos lewisi | Sp. nov | Valid | Fletcher | Cambrian | | United Kingdom | |
| Austerops couvinensis | Sp. nov | Valid | Van Viersen, Taghon & Magrean | Devonian (Eifelian) | Jemelle Formation | Belgium | A member of Phacopida. |
| Austerops hottonensis | Sp. nov | Valid | Van Viersen, Taghon & Magrean | Devonian (Eifelian) | Jemelle Formation | Belgium | A member of Phacopida. |
| Cyrtoproetus kerhini | Sp. nov | Valid | Brezinski | Carboniferous (late Mississippian) | Fayetteville Formation | United States | |
| Declivolithus titan | Sp. nov | Valid | Fortey & Edgecombe | Ordovician (Katian) | Lower Ktaoua Formation | Morocco | A member of the family Trinucleidae. |
| Elrathia groenlandica | Sp. nov | Junior homonym | Geyer & Peel | Cambrian | Ekspedition Bræ Formation | Greenland | The specific name is preoccupied by Elrathia? groenlandica Poulsen (1927). Geyer & Peel (2020) coined a replacement name Elrathia hensonensis. |
| Elrathina aphrodite | Sp. nov | Valid | Geyer & Peel | Cambrian | Ekspedition Bræ Formation | Greenland | |
| Elrathina athena | Sp. nov | Valid | Geyer & Peel | Cambrian | Ekspedition Bræ Formation | Greenland | |
| Elrathina hera | Sp. nov | Valid | Geyer & Peel | Cambrian | Ekspedition Bræ Formation | Greenland | |
| Holmdalia glabra | Sp. nov | Valid | Westrop & Dengler | Camnrian (Guzhangian) | | Canada | |
| Holmdalia lata | Sp. nov | Valid | Westrop & Dengler | Camnrian (Guzhangian) | | Canada | |
| Holmdalia palpebra | Sp. nov | Valid | Westrop & Dengler | Camnrian (Drumian) | | Canada | |
| Holmdalia tenaga | Sp. nov | Valid | Westrop & Dengler | Camnrian (Drumian) | | Canada | |
| Holmdalia tubercula | Sp. nov | Valid | Westrop & Dengler | Camnrian (Guzhangian) | | Canada | |
| Hottonops | Gen. et sp. nov | Valid | Van Viersen, Taghon & Magrean | Devonian (Eifelian) | | Belgium | A member of Phacopida. Genus includes new species H. daumeriesi. |
| Illaenus (Baltillaenus) | Subgen. nov | Valid | Krylov | Ordovician | | Estonia  Poland  Russia  Sweden | A subgenus of Illaenus. The type species is Illaenus laticlavius Eichwald (1860); the subgenus also includes I. plautini Holm (1886), I. glabrisculus Jaanusson (1957) and I. incisus Jaanusson (1957). |
| Illaenus (Pseudoillaenus) | Subgen. et comb. nov | Valid | Krylov | Ordovician | | Estonia  Russia | A subgenus of Illaenus. The type species is "Entomostracites" tauricornis Kutorga (1848); the subgenus also includes I. wahlenbergi (Eichwald, 1825), I. schuberti Nielsen (1995), I. dalmani Volborth (1863) and I. sarsi Jaanusson (1954). |
| Illaenus (Rutheniaeillaenus) | Subgen. et sp. nov | Valid | Krylov | Ordovician | | Estonia  Poland  Russia  Sweden | A subgenus of Illaenus. The type species is Illaenus jevensis Holm (1886); the subgenus also includes I. sphaericus Holm (1882) and I. sulcifrons Holm (1886), as well as new species I. dubari. |
| Illaenus (Trigonillaenus) | Subgen. et comb. 2 sp. nov | Valid | Krylov | Ordovician | | Estonia  Finland  Germany  Poland  Russia | A subgenus of Illaenus. The type species is "Wossekia" brevispina Krylov (2010); the subgenus also includes Illaenus schmidti Nieszkowski (1857), I. sinuatus Holm (1886) and I. slancyensis Krylov (2016), as well as new species I. kotlukovae and I. volkhovensis. |
| Illaenus welchi | Sp. nov | Valid | Loch & Ethington | Ordovician (Whiterock Stage) | Antelope Valley Limestone Ninemile Formation | United States | |
| Iputaspis | Gen. et sp. nov | Valid | McCobb & Popov | Ordovician (Katian) | Mayatas Formation | Kazakhstan | A trinucleid trilobite. Genus includes new species I. stepnyakensis. |
| Kaskia pitkinensis | Sp. nov | Valid | Brezinski | Carboniferous (late Mississippian) | Pitkin Formation | United States | |
| Kettneraspis knoppi | Sp. nov | Valid | Basse & Müller | Devonian | | Germany | |
| Kettneraspis ralphi | Sp. nov | Valid | Basse & Müller | Devonian | | Germany | |
| Kingaspidoides alberti | Sp. nov | Valid | Geyer | Cambrian Stage 5 | Tannenknock Formation | Germany | |
| Kingaspidoides meieri | Sp. nov | Valid | Geyer | Cambrian Stage 5 | Tannenknock Formation | Germany | |
| Loreleiops | Gen. et sp. et comb. nov | Valid | Van Viersen, Taghon & Magrean | Devonian (Eifelian-Givetian) | Jemelle Formation | Belgium  Germany | A member of Phacopida. Genus includes new species L. suffeleersi, as well as "Pedinopariops" simulator Basse (1998) and "Pedinopariops" hoelleri van Viersen, Prescher & Savelsbergh (2009). |
| Michaspis jucunda | Sp. nov | Valid | Pegel & Shabanov in Pegel et al. | Middle Cambrian | | Russia | A member of Ptychopariida belonging to the family Proasaphiscidae. |
| Morocops spinifer | Sp. nov | Valid | Van Viersen, Holland & Koppka | Devonian (late Emsian) | Khebchia Formation | Morocco | A member of Phacopidae. |
| Octillaenus marocanus | Sp. nov | Valid | Pereira et al. | Late Ordovician (Katian) | Upper Ktaoua Formation | Morocco | A member of the family Illaenidae. |
| Parasolenopleura parabolica | Sp. nov | Valid | Geyer | Cambrian Stage 5 | Tannenknock Formation | Germany | |
| Parasolenopleura wurmi | Sp. nov | Valid | Geyer | Cambrian Stage 5 | Tannenknock Formation | Germany | |
| Pengia palsgaardia | Sp. nov | Valid | Ebbestad & Weidner | Cambrian | | Denmark | A member of Burlingiidae. |
| Platypeltoides carmenae | Sp. nov | Valid | Corbacho et al. | Ordovician (Tremadocian) | Lower Fezouata Formation | Morocco | A member of the family Nileidae. |
| Pseudophillipsia (Carniphillipsia) dizluensis | Sp. nov | Valid | Ameri, Yazdi & Bahrami | Permian (Wordian) | Jamal Formation | Iran | A member of the family Phillipsiidae. |
| Shantungia liui | Sp. nov | Valid | Ren, Wei & Yuan | Cambrian (Guzhangian) | Kushan Formation | China | A member of the family Damesellidae. |
| Skreiaspis punctatissimus | Sp. nov | Valid | Fletcher | Cambrian | | Canada | |
| Tafilaltaspis ahrensi | Sp. nov | Valid | Basse & Müller | Devonian | Leun Limestone | Germany | |
| Vysocania moraveci | Sp. nov | Valid | Pereira et al. | Late Ordovician (probably Sandbian) | Letná Formation Libeň Formation | Czech Republic | A member of the family Illaenidae. |

## Other arthropods
### Research

* Nielsen, Rasmussen & Harper (2017) confirm the presence of dimorphism in a large sample of individuals of Isoxys volucris from the Cambrian Sirius Passet Lagerstätte (Greenland), which they interpret as likely sexual dimorphism.
* A redescription of Utahcaris orion based on a restudy of the original material is published by Legg & Pates (2017).
* A study on the phylogenetic relationships of Enalikter aphson is published by Parry, Legg & Sutton (2017), who support the original interpretation of the species as an arthropod.
* A study on the lateral tail flexibility in the eurypterid Slimonia acuminata based on a new specimen is published by Persons & Acorn (2017).
* Traces produced by swimming eurypterids are described from the Silurian Williamsville Formation (Ontario, Canada) and Tonoloway Formation (Pennsylvania, United States) by Vrazo & Ciurca (2017), who name a new ichnotaxon Arcuites bertiensis.
* Description of the anatomy of the Triassic horseshoe crab species Yunnanolimulus luopingensis based on specimens with well preserved appendages and soft tissues, recovered from the Guanling Formation (China), is published by Hu et al. (2017).
* A study on the phylogenetic relationships of Rhyniognatha hirsti is published by Haug & Haug (2017) who consider this taxon to be more likely a myriapod (possibly a centipede) rather than an insect.
* A study on the age of the Cowie Harbour Fish Bed (Scotland, United Kingdom), containing fish and arthropod fossils (including the millipede Pneumodesmus newmani), is published by Suarez et al. (2017).
* A study on the microstructural details of the cuticle of the concavicarid thylacocephalans from the Devonian (Famennian) of Poland, identifying possible remains of sensory system, is published by Broda & Zatoń (2017).
* A review of the research history, distribution, anatomy, ontogeny and inferred mode of life of Agnostus pisiformis is published by Eriksson & Horn (2017), who also present enlarged three-dimensional sculptural models of members of the species.
* A restudy of the Burgess Shale arthropod Habelia based on known and new specimens is published by Aria & Caron (2017), who interpret Habelia as a close relative of Sanctacaris uncata and name a new arachnomorph order Habeliida.

### New taxa

| Name | Novelty | Status | Authors | Age | Unit | Location | Notes |
| Acutobalteus | Gen. et sp. nov | Valid | Betts et al. | Early Cambrian | | Australia | A member of Bradoriida. Genus includes new species A. sinuosus. |
| Ankitokazocaris chaohuensis | Sp. nov | Valid | Ji et al. | Early Triassic | | China | A member of Thylacocephala (a group of arthropods of uncertain phylogenetic placement, possibly crustaceans). |
| Antarcticarcinus | Gen. et sp. nov | Valid | Collette, Isbell & Miller | Permian | Pagoda Formation | Antarctica | A member of Euthycarcinoidea. Genus includes new species A. pagoda. |
| Beyrichona avannga | Sp. nov | Valid | Peel | Cambrian Stage 4 | | Greenland | A member of Bradoriida. |
| Diploaspis praecursor | Sp. nov | Valid | Lamsdell & Briggs | Late Silurian | Phelps Member of the Fiddlers Green Formation (Bertie Group) | United States | |
| Eozetetes | Gen. et sp. nov | Valid | Edgecombe, Paterson & García-Bellido | Early Cambrian | Emu Bay Shale | Australia | A member of Euarthropoda of uncertain phylogenetic placement, might be related to aglaspidids or Emeraldella. The type species is Eozetetes gemmelli. |
| Eozhexiella | Gen. et sp. nov | Valid | Betts et al. | Early Cambrian | | Australia | A member of Bradoriida. Genus includes new species E. adnyamathanha. |
| Globulocaris | Gen. et sp. nov | | Teruzzi & Charbonnier in Charbonnier et al. | Late Cretaceous (Cenomanian) | | Lebanon | A member of Thylacocephala belonging to the group Concavicarida and the family Protozoeidae. The type species is G. garassinoi. |
| Glypharthrus magnoculus | Sp. nov | Valid | Lerosey-Aubril et al. | Cambrian (Furongian) | McKay Group | Canada | A member of Aglaspidida. |
| Glypharthrus trispinicaudatus | Sp. nov | | Lerosey-Aubril, Zhu & Ortega-Hernández | Cambrian (Jiangshanian) | Sandu Formation | China | A member of Aglaspidida belonging to the family Aglaspididae. |
| Hamaticaris | Gen. et comb. nov | | Charbonnier in Charbonnier et al. | Late Cretaceous (Santonian) | | Lebanon | A member of Thylacocephala belonging to the group Concavicarida and the family Protozoeidae. The type species is  "Protozoea" damesi Roger (1946). |
| Hipponicharion skovstedi | Sp. nov | Valid | Peel | Cambrian Stage 4 | | Greenland | A member of Bradoriida. |
| Itagnostus subhastatus | Sp. nov | Valid | Geyer & Peel | Cambrian | Ekspedition Bræ Formation | Greenland | A member of Agnostida (a group of arthropods of uncertain phylogenetic placement, possibly trilobites). |
| Keelicaris | Gen. et sp. nov | | Teruzzi & Charbonnier in Charbonnier et al. | Late Cretaceous (Santonian) | | Lebanon | A member of Thylacocephala belonging to the group Concavicarida and the family Microcarididae. The type species is  K. deborae. |
| Leanchoilia obesa | Sp. nov | Valid | He et al. | Cambrian | | China | |
| Limulitella tejraensis | Sp. nov | Valid | Błażejowski et al. | Middle Triassic (Anisian–early Ladinian) | Ouled Chebbi Formation | Tunisia | A horseshoe crab. |
| Lotagnostus matthewi | Sp. nov | Valid | Westrop & Landing | Cambrian (Furongian) | Chelsey Drive Group | Canada | A member of Agnostida (a group of arthropods of uncertain phylogenetic placement, possibly trilobites) |
| Lotagnostus salteri | Sp. nov | Valid | Westrop & Landing | Cambrian (Furongian) | Chelsey Drive Group | Canada | A member of Agnostida (a group of arthropods of uncertain phylogenetic placement, possibly trilobites) |
| Manawarra | Gen. et sp. nov | Valid | Betts et al. | Early Cambrian | | Australia | A member of Bradoriida. Genus includes new species M. jonesi. |
| Mengdongella | Gen. et sp. nov | Valid | Zhang & Xiao | Cambrian (Paibian) | Wangcun Lagerstätte | China | A bivalved arthropod of uncertain phylogenetic placement. Genus includes new species M. elliptica. |
| Mimetaster florestaensis | Sp. nov | Valid | Aris et al. | Ordovician (early Tremadocian) | Floresta Formation | Argentina | A member of Marrellida belonging to the family Mimetasteridae. |
| Molaria steini | Sp. nov | Valid | Peel | Cambrian Stage 3 | Sirius Passet Lagerstätte | Greenland | |
| Mongolitubulus decensus | Sp. nov | Valid | Betts et al. | Early Cambrian | | Australia | A member of Bradoriida. |
| Navarana | Gen. et comb. nov | Valid | Peel | Cambrian | | Greenland | A member of Bradoriida; a new genus for "Hipponicharion" pearylandica Peel et al. (2016). |
| Occacaris lazizhaiensis | Sp. nov | Valid | Wen et al. | Cambrian | Balang Formation | China | |
| Paleolimulus kunguricus | Sp. nov | Valid | Naugolnykh | Permian (Kungurian) | Shurtan Formation | Russia | A xiphosuran. |
| Paradollocaris | Gen. et sp. nov | | Charbonnier in Charbonnier et al. | Late Cretaceous (Cenomanian) | | Lebanon | A member of Thylacocephala belonging to the group Conchyliocarida and the family Dollocarididae. The type species is  P. vannieri. |
| Siphoniulus muelleri | Sp. nov | Valid | Liu, Rühr & Wesener | Late Cretaceous | Burmese amber | Myanmar | A millipede, a species of Siphoniulus. |
| Siphoniulus preciosus | Sp. nov | Valid | Liu, Rühr & Wesener | Late Cretaceous | Burmese amber | Myanmar | A millipede, a species of Siphoniulus. |
| Thylacocaris | Gen. et sp. nov | | Audo & Charbonnier in Charbonnier et al. | Late Cretaceous (Cenomanian) | | Lebanon | A member of Thylacocephala belonging to the group Conchyliocarida and the family Dollocarididae. The type species is  T. schrami. |
| Tokummia | Gen. et sp. nov | Valid | Aria & Caron | Cambrian Stage 5 | Stephen Formation | Canada | A large bivalved arthropod belonging to the order Hymenocarina and the family Protocarididae. Genus includes new species T. katalepsis. |
| Tuzoia jianheensis | Sp. nov | Valid | Chen et al. | Cambrian | | China | |
| Vaderlimulus | Gen. et sp. nov | Valid | Lerner, Lucas & Lockley | Early Triassic (Olenekian) | Thaynes Group | United States | A xiphosuran belonging to the family Austrolimulidae. Genus includes new species V. tricki. |
| Xandarella mauretanica | Sp. nov | | Ortega-Hernández et al. | Cambrian Stage 5 | Tatelt Formation | Morocco | A member of Artiopoda belonging to the group Xandarellida. El Albani et al. (2024) reclassified it as a species of trilobite genus Gigoutella. |