2024 in arthropod paleontology
From Wikipedia, the free encyclopedia
2024 in arthropod paleontology is a list of new arthropod fossil taxa, including arachnids, crustaceans, trilobites, and other arthropods (except insects, which have their own list) that were announced or described, as well as other significant arthropod paleontological discoveries and events which occurred in 2024.
| List of years in arthropod paleontology |
|---|
Arachnids
Araneae
| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
|---|---|---|---|---|---|---|---|---|
|
Gen. et 3 sp. nov |
Wang et al. |
Cretaceous |
Burmese amber |
A member of the family Macrothelidae. Genus includes new species A. pauciverrucae, A. geminata and A. longicaudata. |
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|
Sp. nov |
Valid |
Wunderlich |
Eocene |
Baltic amber |
Europe (Baltic Sea region) |
A possible long-jawed orb weaver. |
||
|
Sp. nov |
Valid |
Wunderlich |
Eocene |
Baltic amber |
Europe (Baltic Sea region) |
An orb-weaver spider. The spelling ?Baltaraneus rotundus is used in the paper naming it, but the discussion of its relationships tentatively refers it to the genus Bararaneus.[2] |
||
|
Gen. et sp. nov |
Valid |
Wunderlich |
Cretaceous |
Burmese amber |
A tree trunk spider. The type species is B. translucens. |
|||
|
Sp. nov |
Guo, Selden & Ren in Guo et al. |
A spider belonging to the family Lagonomegopidae. |
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|
Sp. nov |
Guo et al. |
Late Cretaceous (Cenomanian) |
Burmese amber |
A spider belonging to the family Lagonomegopidae. |
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|
Sp. nov |
Valid |
Hou et al. |
Cretaceous |
Burmese amber |
A spider belonging to the family Pholcochyroceridae. |
|||
|
Gen. et sp. nov |
Valid |
Wunderlich |
Eocene |
Rovno amber |
A tree trunk spider. The type species is M. rovnoensis. |
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|
Sp.nov |
Poinar |
Quaternary |
An ant-mimick spider. Originally described as a species of Myrmarachne; Perger (2024) transferred it to the genus Myrmecium.[7] |
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|
Sp. nov |
Valid |
Wunderlich |
Cretaceous |
Burmese amber |
A possible tube-dwelling spider. |
|||
|
Sp. nov |
Valid |
Hou et al. |
Cretaceous |
Burmese amber |
A spider belonging to the family Pholcochyroceridae. |
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|
Sp. nov |
García-Villafuerte, Carbot-Chanona & Gómez-Pérez |
Miocene |
A species of Pholcophora. |
|||||
Araneological research
- Córdova-Tabares et al. (2024) describe a sac spider specimen from the Mexican amber preserved with an ant belonging to the genus Azteca, providing evidence of a fossil spider showing trapping and feeding behavior seen also in its extant relatives.[9]
Ixodida
| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
|---|---|---|---|---|---|---|---|---|
|
Sp. nov |
Valid |
Chitimia-Dobler, Dunlop & Mans in Chitimia-Dobler et al. |
Cretaceous |
Burmese amber |
A tick belonging to the family Nuttalliellidae. |
|||
|
Deinocroton lacrimus[10] |
Sp. nov |
Valid |
Chitimia-Dobler, Dunlop & Mans in Chitimia-Dobler et al. |
Cretaceous |
Burmese amber |
A tick belonging to the family Nuttalliellidae. |
||
|
Gen. et sp. nov |
Valid |
Chitimia-Dobler, Dunlop & Mans in Chitimia-Dobler et al. |
Cretaceous |
Burmese amber |
A tick belonging to the family Nuttalliellidae. The type species is L. robustus. |
|||
|
Sp. nov |
Valid |
Chitimia-Dobler, Dunlop & Mans in Chitimia-Dobler et al. |
Cretaceous |
Burmese amber |
A species of Nuttalliella. |
|||
|
Sp. nov |
Valid |
Chitimia-Dobler, Dunlop & Mans in Chitimia-Dobler et al. |
Cretaceous |
Burmese amber |
A species of Nuttalliella. |
|||
|
Sp. nov |
Valid |
Chitimia-Dobler, Dunlop & Mans in Chitimia-Dobler et al. |
Cretaceous |
Burmese amber |
A species of Nuttalliella. |
|||
|
Sp. nov |
Valid |
Chitimia-Dobler, Dunlop & Mans in Chitimia-Dobler et al. |
Cretaceous |
Burmese amber |
A species of Nuttalliella. |
|||
|
Sp. nov |
Valid |
Chitimia-Dobler, Dunlop & Mans in Chitimia-Dobler et al. |
Cretaceous |
Burmese amber |
A species of Nuttalliella. |
|||
Opiliones
| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
|---|---|---|---|---|---|---|---|---|
|
Sp. nov |
Valid |
Bartel, Dunlop & Wedmann |
Eocene |
Possibly a species of Leiobunum. |
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|
Sp. nov |
Valid |
Bartel, Dunlop & Wedmann |
Eocene |
Messel pit |
Possibly a species of Leiobunum. |
|||
Opiliones research
- Gainett et al. (2024) report that extant daddy longlegs have six eyes, including four vestigial ones, and reevaluate the affinities of fossil members of Opiliones with four eyes, resulting in older estimated ages of harvestman diversification.[12]
Pseudoscorpiones
| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
|---|---|---|---|---|---|---|---|---|
|
Gen. et sp. nov |
Valid |
Sánchez-García et al. |
Early Cretaceous (Albian) |
A member of the family Garypinidae. The type species is C. zaragozai. |
||||
|
Gen. et sp. nov |
Valid |
Agnihotri et al. |
Eocene |
Cambay Basin |
A member of the family Geogarypidae. The type species is G. valiyaensis. |
|||
|
Sp. nov |
Valid |
Röschmann et al. |
Late Cretaceous (Cenomanian) |
Burmese amber |
A member of the family Hyidae. |
|||
|
Sp. nov |
Córdova-Tabares et al. |
Miocene |
A member of the family Cheliferidae. |
|||||
|
Gen. et sp. nov |
Valid |
Sánchez-García et al. |
Early Cretaceous (Albian) |
Escucha Formation |
A member of the family Garypinidae. The type species is I. alavensis. |
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Sarcoptiformes
| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
|---|---|---|---|---|---|---|---|---|
|
Sp. nov |
Valid |
Kolesnikov, Vorontsov & Sidorchuk |
Eocene |
Baltic amber |
Europe (Baltic Sea region) |
A member of Oribatida belonging to the family Collohmanniidae. |
||
|
Sp. nov |
Valid |
Kolesnikov, Vorontsov & Sidorchuk |
Eocene |
Baltic amber |
Europe (Baltic Sea region) |
A member of Oribatida belonging to the family Collohmanniidae. |
||
|
Sp. nov |
Valid |
Kolesnikov, Vorontsov & Sidorchuk |
Eocene |
Baltic amber |
Europe (Baltic Sea region) |
A member of Oribatida belonging to the family Collohmanniidae. |
||
|
Sp. nov |
Valid |
Kolesnikov, Vorontsov & Sidorchuk |
Eocene |
Baltic amber |
Europe (Baltic Sea region) |
A member of Oribatida belonging to the family Collohmanniidae. |
||
|
Sp. nov |
Valid |
Kolesnikov, Vorontsov & Sidorchuk |
Eocene |
Baltic amber |
Europe (Baltic Sea region) |
A member of Oribatida belonging to the family Collohmanniidae. |
||
|
Sp. nov |
Valid |
Kolesnikov, Vorontsov & Sidorchuk |
Eocene |
Baltic amber |
Europe (Baltic Sea region) |
A member of Oribatida belonging to the family Collohmanniidae. |
||
|
Sp. nov |
Valid |
Kolesnikov, Vorontsov & Sidorchuk |
Eocene |
Baltic amber |
Europe (Baltic Sea region) |
A member of Oribatida belonging to the family Collohmanniidae. |
||
Schizomida
Schizomid research
- A study on changes of body size and shape diversity of male flagella in Schizomida throughout their evolutionary history is published by Belojević et al. (2024).[18]
Scorpiones
| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
|---|---|---|---|---|---|---|---|---|
|
Sp. nov |
Valid |
Lourenço in Lourenço & Velten |
Cretaceous |
Burmese amber |
A member of Buthoidea belonging to the family Palaeoburmesebuthidae |
|||
|
Sp. nov |
Valid |
Lourenço |
Cretaceous |
Burmese amber |
A member of the family Palaeoeuscorpiidae. |
|||
|
Sp. nov |
Valid |
Lourenço in Lourenço & Velten |
Cretaceous |
Burmese amber |
A member of the family Chaerilobuthidae or Pseudochactidae.[22] |
|||
|
Chaerilobuthus staxi[23] |
Sp. nov |
Valid |
Lourenço in Lourenço & Velten |
Cretaceous |
Burmese amber |
A member of the family Chaerilobuthidae or Pseudochactidae.[22] |
||
|
Gen. et sp. nov |
Valid |
Lourenço in Lourenço & Velten |
Cretaceous |
Burmese amber |
A member of Buthoidea belonging to the family Palaeoburmesebuthidae. The type species is P. schmidti. |
|||
|
Gen. et sp. nov |
Disputed |
Lourenço in Lourenço & Velten |
Cretaceous |
Burmese amber |
A member of the family Chaerilobuthidae or Pseudochactidae.[22] The type species is S. schmidti. Xuan et al. (2025) considered the genus Serratochaerilobuthus to be a junior synonym of the genus Chaerilobuthus, though the authors maintained S. schmidti as a distinct species within the latter genus.[22] |
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Scorpion research
- Review of the higher classification of fossil scorpions is published by Dunlop & Garwood (2024) .[26]
- Lourenço & Velten (2024) report the discovery of pro-juvenile specimens of Betaburmesebuthus kobberti trapped together in a piece of Burmese amber, and interpret this finding as possible evidence that Cretaceous palaeoburmesebuthid scorpions produced litters with reduced number of offspring but including large pro-juveniles.[27]
Trombidiformes
| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
|---|---|---|---|---|---|---|---|---|
|
Sp. nov |
Valid |
Khaustov et al. |
Eocene |
Rovno amber |
A mite belonging to the family Resinacaridae. |
|||
|
Sp. nov |
Valid |
Khaustov et al. |
Eocene |
Rovno amber |
A mite belonging to the family Resinacaridae. |
|||
|
Sp. nov |
Valid |
Khaustov et al. |
Eocene |
Rovno amber |
A mite belonging to the family Resinacaridae. |
|||
|
Sp. nov |
Valid |
Khaustov et al. |
Eocene |
Rovno amber |
A mite belonging to the family Resinacaridae. |
|||
|
Gen. et sp. nov |
Valid |
Khaustov, Vorontsov & Lindquist |
Cretaceous |
Burmese amber |
A mite belonging to the family Trochometridiidae. The type species is R. pankowskiorum. |
|||
Trombidiform research
- Larvae of mites belonging to the group Erythraeoidea parasitising gall midges (providing evidence of an association unknown in extant fauna) are reported from the Cretaceous amber from Myanmar by Arce et al. (2024), who interpret this finding as indicative of shift of the host range of the studied mites after the Cretaceous.[30]
Uropygi
| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
|---|---|---|---|---|---|---|---|---|
|
Sp. nov |
Valid |
Santana et al. |
Early Cretaceous (Aptian—Albian) |
A whip scorpion belonging to the family Thelyphonidae. |
 | |||
Other arachnids
| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
|---|---|---|---|---|---|---|---|---|
|
Gen. et sp. nov |
Valid |
Selden & Dunlop |
Carboniferous (Pennsylvanian) |
A member of Pantetrapulmonata of uncertain affinities. The type species is D. acanthopoda. |
 | |||
Other arachnid research
- A study on the mouthparts of members of the genus Palaeocharinus from the Rhynie chert (United Kingdom), providing evidence of the presence of a sophisticated mechanism for liquid feeding comparable to the filtration mechanisms of extant arachnids, is published by Long et al. (2024).[33]
- A study on the structure of cuticles of Palaeocharinus, providing evidence of possible adaptations to terrestrial life, is published by Long et al. (2024).[34]
Eurypterids
| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
|---|---|---|---|---|---|---|---|---|
|
Gen. et sp. nov |
Ma et al. |
Devonian |
A member of the family Stylonuridae. The type species is Q. spineus. |
 | ||||
Eurypterid research
- A study on the evolution of eurypterid body size is published by Ruebenstahl et al. (2024), who find that giant size evolved independently in different eurypterid lineages, without clear relation to habitat or environmental drivers.[36]
- Bicknell et al. (2024) describe new fossil material of Silurian and Devonian eurypterids from the Wallace Shale and Merrimerriwa Formation (Australia), extending known geographical range of Jaekelopterus into Gondwana.[37]
- A diverse assemblage of eurypterid remains, including isolated setae and cuticular sheets with attached setae, is described from the Devonian Ora Formation (Iraq) by Makled et al. (2024).[38]
- Braddy (2024) studies the life mode of carcinosomatoid eurypterids, interpreting them as slow-swimming ambush predators and mud grubbers, and interprets megalograptids as likely more basal than carcinosomatids and mixopterids.[39]
- Bicknell, Gaines & Hopkins (2024) describe a carcinosomatid specimen from the Ordovician strata from the Beecher's Trilobite Bed (New York, United States) preserving the first evidence for mesosomal musculature in eurypterids, and providing evidence that eurypterid musculature can be preserved in pyrite.[40]
- Poschmann & Tollerton (2024) describe a new specimen of Eysyslopterus patteni from the Silurian Rootsiküla/Saaremaa Lagerstätte (Estonia), providing information on the morphology of the metastoma of the studied eurypterid.[41]
- Description of genital appendages of Acutiramus macrophthalmus is published by Cheng & Briggs (2024).[42]
Xiphosurans
Xiphosuran research
- A specimen of Tachypleus syriacus preserved with intestinal contents transitioning into a coprolite is described from the Cenomanian Hjoula Lagerstätte (Lebanon) by Bicknell et al. (2024).[43]
Other chelicerates
| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
|---|---|---|---|---|---|---|---|---|
|
Gen. et sp. nov |
Valid |
Bicknell et al. |
Carboniferous (Serpukhovian) |
A member of Euchelicerata of uncertain affinities. The type species is T. edgecombei. |
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| Setapedites[45] | Gen. et sp. nov | Valid |
Lustri et al. |
Lower Ordovician | Fezouata Formation |  Morocco |
A member of Euchelicerata recovered as an offacolid synziphosurine. The type species is S. abundantis. |  |
Other chelicerate research
- Lustri et al. (2024) describe new fossil material of Bunaia woodwardi from the Silurian (Přídolí) Williamsville Formation of the Bertie Group (Ontario, Canada), and interpret B. woodwardi as a member of the family Offacolidae.[46]
- Revision of the taxonomy, morphology and stratigraphical distribution of members of the genus Limuloides is published by Howard (2024).[47]
- Sabroux et al. (2024) revise the fossil material of Devonian sea spiders from the Hunsrück Slate (Germany), providing new information on their anatomy and affinities, and find no compelling evidence of Pantopoda in the Devonian.[48]
Crustaceans
Malacostracans
| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
|---|---|---|---|---|---|---|---|---|
|
Gen. et sp. nov |
Vega, Garassino, Nyborg & Pasini in Vega et al. |
Late Cretaceous |
A raninoid crab. The type species is A. hexagranula. |
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|
Sp. nov |
Valid |
Van Bakel et al. |
Late Cretaceous (Santonian) |
Vaals Formation |
A crab belonging to the superfamily Retroplumoidea and the family Binkhorstiidae. |
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|
Sp. nov |
Valid |
Nyborg et al. |
Late Cretaceous (Campanian) |
A raninoid crab. |
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|
Gen. et sp. nov |
Valid |
Godfrey, Feldmann & Schweitzer |
Miocene |
An isopod belonging to the family Cymothoidae. The type species is C. osbornei. |
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|
Sp. nov |
Valid |
Garassino & Pasini in Girone et al. |
Pleistocene |
A crab belonging to the family Goneplacidae. |
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|
Gen. et sp. nov |
Valid |
Ossó, Charbonnier, Hyžný, van Bakel & Devillez in Ossó et al. |
Early Cretaceous (Albian) |
A member of the family Ctenochelidae. The type species is C. salasi. |
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|
Sp. nov |
Valid |
Ossó et al. |
Late Cretaceous (Cenomanian) |
Picofrentes Formation |
A crab belonging to the family Dromiidae and the subfamily Goniodromitinae. |
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|
Comb. nov |
Valid |
Oligocene (Chattian) |
A shrimp belonging to the family Atyidae; moved from Caridina nitida Milne-Edwards (1879). |
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|
Gen. et comb. nov |
Valid |
Ferratges |
Eocene |
Roda Formation |
A crab belonging to the subfamily Actinotocarcininae. The type species is "Periacanthus" tetracornis Ferratges et al. (2014) |
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|
Gen. et 2 sp. nov |
Valid |
Copilaş-Ciocianu & Ionesi |
Miocene |
An amphipod belonging to the family Gammaridae. The type species is E. moldavica; genus also includes E. prisca. |
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|
Sp. nov |
Valid |
De Angeli & Lovato |
Eocene |
A crab belonging to the group Portunoidea. |
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|
Sp. nov |
Valid |
Gašparič et al. |
Oligocene (Chattian) |
Trbovlje Formation |
A crab belonging to the family Hymenosomatidae. |
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|
Sp. nov |
Valid |
Nyborg & Garassino |
Late Cretaceous (Campanian) |
Tuna Canyon Formation |
A crab belonging to the family Lithophylacidae. |
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|
Sp. nov |
Garassino, Pasini, Mirzaie Ataabadi & Nyborg in Garassino et al. |
Miocene (Tortonian) |
A crab belonging to the family Leucosiidae and the subfamily Ebaliinae. |
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|
Sp. nov |
Valid |
Ossó, Charbonnier, Hyžný, van Bakel & Devillez in Ossó et al. |
Early Cretaceous (Albian) |
Escucha Formation |
A crab belonging to the family Palaeocorystidae. |
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|
Sp. nov |
Valid |
Gašparič et al. |
Oligocene (Chattian) |
Trbovlje Formation |
A crab belonging to the family Hymenosomatidae. |
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|
Sp. nov |
Valid |
Luque & Gerken |
Plio-Pleistocene |
Hijikata Formation |
A member of the family Diastylidae. |
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|
Sp. nov |
Valid |
De Angeli & Lovato |
Eocene |
A crab belonging to the group Portunoidea. |
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|
Sp. nov |
Kočová Veselská et al. |
Late Cretaceous |
A crab belonging to the family Necrocarcinidae. |
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|
Sp. nov |
Valid |
Garassino & Pasini in Girone et al. |
Pleistocene |
A crab belonging to the family Goneplacidae. |
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|
Sp. nov |
Valid |
De Angeli, Ceccon & Caporiondo |
Oligocene |
A crab belonging to the superfamily Dromioidea and the family Basinotopidae. |
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|
Gen. et sp. nov |
Valid |
Winkler et al. |
Late Jurassic |
A shrimp belonging to the superfamily Bresilioidea. The type species is P. kurthetriegeri. |
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|
Gen. et comb. nov |
Valid |
Charbonnier et al. |
Miocene (Messinian) |
A crab belonging to the superfamily Majoidea and the family Oregoniidae. The type species is "Hyas" oranensis Van Straelen (1937). |
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|
Sp. nov |
Valid |
Ossó, Charbonnier, Hyžný, van Bakel & Devillez in Ossó et al. |
Early Cretaceous (Aptian) |
Benassal Formation |
A crab belonging to the family Necrocarcinidae. |
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|
Gen. et sp. nov |
Garassino, Pasini, Mirzaie Ataabadi & Nyborg in Garassino et al. |
Miocene (Tortonian) |
A crab belonging to the family Portunidae. The type species is P. arcuatus. |
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|
Sp. nov |
Valid |
De Angeli, Ceccon & Caporiondo |
Oligocene |
A species of Pilumnus. |
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|
Sp. nov |
Valid |
De Angeli & Bellin |
Eocene |
A species of Portunus. |
||||
|
Sp. nov |
Valid |
Pasini & Garassino |
Miocene |
A species of Portunus. |
||||
|
Sp. nov |
Valid |
Van Bakel & Ossó |
Miocene (Tongaporutuan) |
Urenui Formation |
A relative of the Tasmanian giant crab. |
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|
Gen. et comb. nov |
Valid |
Artal & Ossó |
Paleocene and Eocene |
A crab belonging to the family Geryonidae. The type species is "Xanthilites" macrodactylus Van Straelen (1924); genus also includes "Coeloma" martinezensis Rathbun (1926) and "Xanthilites macrodactylus" pyrenaicus Artal & Vía (1989), raised to the rank of the species Pyrenicola pyrenaica. |
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|
Sp. nov |
Vega, Garassino, Nyborg & Pasini in Vega et al. |
Late Cretaceous |
A raninoid crab. |
|||||
|
Sp. nov |
Valid |
Liu et al. |
Ordovician |
Preservation Formation |
A member of Phyllocarida belonging to the family Caryocarididae. |
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|
Gen. et sp. nov |
Vega, Garassino, Nyborg & Pasini in Vega et al. |
Late Cretaceous |
A raninoid crab. The type species is R. monosensis. |
|||||
|
Comb. nov |
(Peach) |
Carboniferous (Tournaisian) |
A member of the family Tealliocarididae. Moved from Tealliocaris robusta Peach (1908). |
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|
Sp. nov |
Valid |
Mychko, Schweitzer & Feldmann |
Late Cretaceous (Campanian) |
A crab belonging to the family Orithopsidae. |
||||
|
Gen. et sp. nov |
Valid |
Garassino et al. |
Eocene |
A member of Caridea. Genus includes new species S. spinosa. |
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|
Sp. nov |
Clark & Ross |
Carboniferous (Tournaisian) |
Ballagan Formation |
A member of the family Tealliocarididae. |
||||
|
Sp. nov |
Clark |
Carboniferous (Bashkirian) |
A member of the family Tealliocarididae. |
|||||
|
Sp. nov |
Clark & Ross |
Carboniferous (Mississippian) |
A member of the family Tealliocarididae. |
|||||
|
Gen. et sp. nov |
Valid |
Garassino et al. |
Eocene |
A member of Astacida. Genus includes new species T. levis. |
||||
|
Sp. nov |
Valid |
Ferratges |
Eocene |
Roda Formation |
A crab belonging to the family Majidae. |
|||
|
Sp. nov |
Valid |
Charbonnier et al. |
Late Jurassic (Tithonian) |
An uncinid lobster. |
||||
|
Gen. et sp. nov |
Valid |
Garassino et al. |
Eocene |
A member of Caridea. Genus includes new species V. ypresiana. |
||||
|
Gen. et comb. nov |
Valid |
Schweitzer |
Eocene (Ypresian) |
A crab belonging to the family Dromiidae. The type species is "Dromiopsis" americana Roberts (1956). |
||||
|
Gen. et comb. nov |
Valid |
Charbonnier et al. |
Miocene (Messinian) |
A crab belonging to the superfamily Majoidea and the family Epialtidae. The type species is "Maia" arambourgi Van Straelen (1937). |
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Malacostracan research
- A study on the hydrodynamic performance of carapaces of caryocaridid archaeostracans, providing evidence that the carapace shapes facilitated the pelagic mode of life of caryocaridids, is published by Pates & Xue (2024).[79]
- A study on carapaces of specimens of the caryocaridid species Soomicaris cedarbergensis from the Ordovician Xinertai Formation (China), providing probable evidence of adaptations to the pelagic lifestyle, is published by Liu et al. (2024).[80]
- Bicknell et al. (2024) describe fossil material of mantis shrimps belonging to the group Archaeostomatopodea and possibly to the genus Tyrannophontes fom the Carboniferous Wea Shale Member of the Cherryvale Shale (Nebraska, United States), preserving the oldest evidence of the presence of biramous gilled appendages in mantis shrimps reported to date.[81]
- Redescription of Kellnerius jamacaruensis is published by Barros, Oliveira & Saraiva (2024), who reaffirm the inclusion of this shrimp within the family Palaemonidae.[82]
- Charbonnier et al. (2024) present the first reconstruction of the internal anatomy of Eryma ventrosum, based on data from a well-preserved female and male specimens from the La Voulte-sur-Rhône Lagerstätte (France).[83]
- Purported crushing teeth of teleosts or Lepidotes from the Upper Cretaceous Allen, Los Alamitos, La Colonia, Loncoche and Chorrillo formations (Argentina) are reinterpreted as bio-gastroliths (temporary structures within the lateral walls of the stomach, serving as reservoirs of calcium carbonate before molting) of members of Astacidea by Panzeri et al. (2024).[84]
- Luque et al. (2024) provide fossil node calibration points for the studies of the phylogenetic relationships of crabs, and reassess the earliest occurrences of members of several crab groups.[85]
- Redescription of "Dromiopsis" oscari is published by LaBonte, Schweitzer & Feldmann (2024) who transfer this crab from the family Dynomenidae to the family Goniodromitidae and to the genus Sabellidromites.[86]
- A study on the diversity and distribution of crabs belonging to the group Homoloida throughout their evolutionary history is published by Shaffer & Schweitzer (2024).[87]
Ostracods
| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
|---|---|---|---|---|---|---|---|---|
|
Sp. nov |
Sobolev |
Devonian-Carboniferous transition |
A member of the family Editiidae. |
|||||
|
Sp. nov |
Ceolin et al. |
Cretaceous–Palaeogene transition |
||||||
| Ampuloides thungsamedensis[90] | Sp. nov | Promduang & Chitnarin | Late Silurian -Early Devonian | Kuan Tung Formation |  Thailand |
A member of Podocopida belonging to the family Pachydomellidae. | ||
|
Sp. nov |
Mukai & Tanaka |
Miocene |
Kaigarabashi Formation |
|||||
|
Gen. et sp. nov |
Valid |
Almeida-Lima et al. |
Early Cretaceous (Aptian) |
Crato Formation |
Genus includes new species B. reticularis. |
|||
|
Gen. et comb. et 3 sp. nov |
Valid |
Tesakova |
Middle Jurassic (Bathonian and Callovian) |
A member of Podocopida belonging to the family Progonocytheridae. The type species is "Palaeocytheridea" milanovskyi Lyubimova (1955); genus also includes new species B. prima, B. paenultima and B. ultima. |
||||
|
Gen. et 3 sp. nov |
Sobolev |
Devonian-Carboniferous transition |
A member of the family Editiidae. Genus includes new species B. eleganta, B. auctus and B. pretzella. |
|||||
|
Sp. nov |
Mukai & Tanaka |
Miocene |
Kaigarabashi Formation |
|||||
|
Sp. nov |
Valid |
Franz |
Middle Jurassic |
A member of the family Progonocytheridae. |
||||
|
Nom. nov |
Valid |
Guillam |
Early Cretaceous |
Orós Formation |
A member of Cypridoidea; a replacement name for Hastacypris Filho, Fauth & Sames. |
|||
|
Sp. nov |
Ferreira & Ramos |
Neogene |
Solimões Formation |
|||||
|
Sp. nov |
Ferreira & Ramos |
Neogene |
Solimões Formation |
|||||
|
Sp. nov |
Valid |
Cabral, Lord & Pinto in Cabral et al. |
Early Jurassic (Toarcian) |
Póvoa da Lomba Formation |
A member of the family Cytheruridae. |
|||
|
Gen. et sp. nov |
Siveter et al. |
Silurian |
A member of Beyrichicopida belonging to the group Binodicopina and the family Bolliidae. The type species is D. paparme. |
|||||
|
Sp. nov |
Valid |
Cabral, Lord & Pinto in Cabral et al. |
Early Jurassic (Toarcian) |
Póvoa da Lomba Formation |
A member of the family Cytheruridae. |
|||
|
Sp. nov |
Valid |
Franz |
Middle Jurassic |
A member of the family Cytheruridae. |
||||
|
Sp. nov |
Ceolin et al. |
Cretaceous–Palaeogene transition |
||||||
|
Sp. nov |
Ceolin et al. |
Cretaceous–Palaeogene transition |
||||||
|
Gen. et sp. nov |
Valid |
Almeida-Lima et al. |
Early Cretaceous (Aptian) |
Crato Formation |
Genus includes new species M. posteroaltis. |
|||
|
Sp. nov |
McDonald, Weldon & Warne |
Pliocene (Zanclean) |
Jemmys Point Formation |
A member of the family Bairdiidae. |
||||
|
Sp. nov |
McDonald, Weldon & Warne |
Pliocene (Zanclean) |
Jemmys Point Formation |
A member of the family Cytheruridae. |
||||
|
Gen. et 3 sp. nov |
Valid |
Cabral & Lord in Cabral et al. |
Jurassic (Toarcian and Aalenian) |
São Gião Formation |
A member of the family Protocytheridae. The type species is O. herrrigi; genus also includes O. mataensis and possibly also O.? sicoensis. |
|||
|
Sp. nov |
Valid |
Cabral & Lord in Cabral et al. |
Early Jurassic (Toarcian) |
Póvoa da Lomba Formation |
A member of the family Cytheruridae. |
|||
|
Gen. et comb. nov |
Valid |
Tesakova |
Middle Jurassic (Bathonian) |
A member of Podocopida belonging to the family Progonocytheridae. The type species is "Acanthocythere" elongata Wakefield (1994). |
||||
|
Sp. nov |
Ceolin et al. |
Cretaceous–Palaeogene transition |
||||||
|
Sp. nov |
McDonald, Weldon & Warne |
Pliocene (Zanclean) |
Jemmys Point Formation |
A member of the family Trachyleberididae. |
||||
|
Sp. nov |
Forel et al. |
Late Jurassic (Oxfordian) |
||||||
|
Sp. nov |
Valid |
Franz |
Middle Jurassic |
A member of the family Cytheruridae. |
||||
|
Sp. nov |
Valid |
Franz |
Middle Jurassic |
A member of the family Cytheruridae. |
||||
|
Ssp. nov |
Sobolev |
Devonian-Carboniferous transition |
A member of the family Editiidae. |
|||||
|
Gen. et 2 sp. nov |
Valid |
Franz |
Middle Jurassic |
A member of the family Cytheruridae. The type species is P. cittadella; genus also includes P. mediocostata. |
||||
|
Nom. nov |
Valid |
Guillam |
Devonian (Frasnian) |
A replacement name for Ornatella Rozhdestvenskaya in Chibrikova & Rozhdestvenskaya (1959). |
||||
|
Nom. nov |
Li |
Silurian |
A member of the family Bythocytheridae; a replacement name for Scaphium Jordan (1964). Published online in 2024, but the issue date is listed as December 2023. |
|||||
|
Sp. nov |
McDonald, Weldon & Warne |
Pliocene (Zanclean) |
Jemmys Point Formation |
A member of the family Candonidae. |
||||
|
Sp. nov |
Valid |
Almeida-Lima et al. |
Early Cretaceous (Aptian) |
Crato Formation |
||||
|
Sp. nov |
Valid |
Almeida-Lima et al. |
Early Cretaceous (Aptian) |
Crato Formation |
||||
|
Sp. nov |
Song in Song et al. |
Devonian (Givetian) |
Dushan Formation |
A member of Podocopida belonging to the superfamily Bairdiocypridoidea and the family Bairdiocyprididae. |
||||
|
Sp. nov |
Valid |
Almeida-Lima et al. |
Early Cretaceous (Aptian) |
Ipubi Formation |
||||
Ostracod research
- A study on pores and associated canals in extant and Triassic ornate bairdiids, providing new morphological data interpret as supporting the interpretation of the Triassic genera Mirabairdia and Nodobairdia as distinct from the extant genus Triebelina, is published by Forel et al. (2024).[103]
- Taxonomic revision of ostracods from the Lower Cretaceous Codó Formation (Brazil) is published by Coimbra & Petró (2024).[104]
- A study on changes of the diversity of ostracods from the Indo-Australian Archipelago region throughout the Cenozoic, aiming to determine factors responsible for recorded changes, is published by Tian et al. (2024), who argue that the studied region became the richest marine biodiversity hotspot mostly as a result of immunity to major extinction events during the Cenozoic, shift towards colder climate and the increase in habitat size (shelf area).[105]
Thecostracans
| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
|---|---|---|---|---|---|---|---|---|
|
Sp. nov |
Valid |
Gale |
Late Triassic (Rhaetian) |
Westbury Formation |
A barnacle belonging to the family Eolepadidae. |
|||
|
Sp. nov |
Valid |
Gale |
Late Cretaceous (Campanian) |
A barnacle. |
||||
|
Sp. nov |
Valid |
Gale |
Late Cretaceous (Coniacian or Santonian) |
A barnacle. |
||||
|
Gen. et comb. et sp. nov |
Valid |
Gale |
Cretaceous |
A barnacle. The type species is "Arcoscalpellum" transversum Withers (1935); genus also includes new species N. dibleyi. |
||||
|
Sp. nov |
Valid |
Gale |
Late Cretaceous (Cenomanian) |
Zig Zag Chalk Formation |
A barnacle. |
|||
|
Sp. nov |
Valid |
Gale |
Late Cretaceous (Cenomanian) |
Zig Zag Chalk Formation |
A barnacle. |
|||
|
Sp. nov |
Valid |
Gale |
Late Cretaceous (Campanian) |
Newhaven Formation |
A barnacle. |
|||
|
Sp. nov |
Valid |
Gale |
Early Cretaceous (Hauterivian) |
Weald Clay |
A barnacle. |
|||
|
Sp. nov |
Valid |
Gale |
Eocene (Lutetian) |
Selsey Formation |
A barnacle. |
|||
|
Sp. nov |
Valid |
Gale |
Early Cretaceous (Albian) |
Gault Clay |
A barnacle. |
|||
|
Sp. nov |
Valid |
Gale |
Early Cretaceous (Aptian) |
Vectis Formation |
A barnacle. |
|||
Other crustaceans
| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
|---|---|---|---|---|---|---|---|---|
|
Sp. nov |
Valid |
Poschmann et al. |
Devonian |
Klerf Formation |
A clam shrimp. |
|||
|
Gen. et sp. nov |
Valid |
Poschmann et al. |
Devonian |
Klerf Formation |
A clam shrimp. The type species is E. wenndorfi. |
|||
|
Gen. et sp. nov |
Valid |
Geyer, Hegna & Kelber |
Triassic (Anisian) |
A member of the stem lineage of Diplostraca. The type species is G. alsatica. |
||||
|
Nom. nov |
Valid |
Ceccolini & Cianferoni |
Late Jurassic |
A member of the family Eosestheriidae; a replacement name for Pingquania Wang in Wang & Li (2008). Published online in 2024, but the issue date is listed as December 2023. |
||||
|
Gen. et sp. nov |
Valid |
Geyer, Hegna & Kelber |
Triassic (Anisian) |
Grès à Voltzia |
A non-calmanostracan phyllopod, possibly belonging to the stem lineage of Diplostraca. The type species is O. galli. |
|||
|
Sp. nov |
Valid |
Poschmann et al. |
Devonian |
A clam shrimp. |
||||
|
Sp. nov |
Valid |
Xue & Li |
Middle–Late Jurassic |
Yaojie Formation |
A clam shrimp. |
|||
|
Comb. nov |
(Chen) |
Late Triassic (Rhaetian) |
A clam shrimp. Originally described as Euestheria? luchangensis Chen (1974). |
|||||
|
Sp. nov |
Valid |
Liao & Huang in Liao et al. |
Middle Jurassic (Callovian) |
Longmen Formation |
A clam shrimp belonging to the superfamily Eosestherioidea and the family Triglyptidae. |
|||
Other crustacean research
- Alarcón et al. (2024) report the discovery of new clam shrimp assemblages from the Upper Triassic (Norian) Bocas and Montebel formations (Colombia), providing evidence of a similar composition of Norian clamp shrimp assemblages from northwestern Gondwana and rift basins of central Pangea (but different from those from southern Gondwana).[113]
Insects
Radiodonts
| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
|---|---|---|---|---|---|---|---|---|
|
Gen. et sp. nov |
Valid |
Wu et al. |
A radiodont of uncertain phylogenetic placement. The type species is S. ankylosskelos. |
 | ||||
|
Sp. nov |
Valid |
Wu et al. |
Cambrian Stage 3 |
Qingjiang Lagerstätte |
A radiodont of the hurdiidae (peytoiidae) family. Another species, S. hirpex is known from North America. |  | ||
Trilobites
| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
|---|---|---|---|---|---|---|---|---|
|
Gen. et comb. nov |
Valid |
Van Viersen & Müller |
Devonian (Pragian–Emsian transition) |
Abadía Formation |
A member of the family Acastidae. The type species is "Pelitlina" corbachoi Basse & Müller (2016); genus also includes "Pelitlina" smeenki Lieberman & Kloc (1997) and "Acastava" faberi Basse & Franke (2006). |
|||
|
Sp. nov |
Valid |
Sepúlveda et al. |
Soleras Formation |
A member of Redlichiida belonging to the group Olenellina. |
||||
|
Sp. nov |
Valid |
Van Viersen & Müller |
Devonian (Emsian) |
A member of the family Homalonotidae. |
||||
|
Sp. nov |
Valid |
Taylor, Loch & Repetski |
Cambrian (Furongian) |
A member of the family Olenidae. |
||||
|
Sp. nov |
Valid |
Geyer |
Cambrian (Drumian) |
A member of the family Conocoryphidae. |
||||
|
Sp. nov |
Valid |
Geyer |
Cambrian |
A member of the family Conocoryphidae. |
||||
|
Gen. et comb. nov |
Disputed |
Geyer |
Cambrian |
A member of the family Solenopleuridae. The type species is "Liostracus" linnarssoni Brøgger (1878); genus also includes "Parasolenopleura" spinigera Westergård (1953) and possibly "Lonchocephalus" peregrinus Wallerius (1930). Westrop & Landing (2025) did not consider the genus to be demonstrably monophyletic, and considered it to be a possible synonym of Balticomerope.[120] |
||||
|
Gen. et comb. et sp. nov |
Disputed |
Geyer |
Cambrian |
Alum Shale Formation |
A member of the family Solenopleuridae. The type species is "Parasolenopleura" scanica Westergård (1953); genus also includes "Parasolenopleura linnarssoni" brevicauda Westergård (1953), "Solenopleura" flerovae Lermontova in Chernysheva (1953) and "Solenopleura" djainensis Lermontova in Chernysheva (1953) as well as new species B. bornholmensis. Westrop & Landing (2025) did not consider the genus to be demonstrably monophyletic, and considered it to be a possible synonym of Balticoglaucus.[120] |
|||
|
Sp. nov |
Valid |
Alberti |
Devonian |
Rupbach Shale |
A member of the family Lichidae. |
|||
|
Sp. nov |
Valid |
Sundberg, Cothren & Dehler |
Cambrian |
Nounan Formation |
A member of the family Aphelaspididae. |
|||
|
Gen. et comb. nov |
Valid |
Van Viersen |
Silurian |
Motol Formation |
A member of the family Odontopleuridae. The type species is "Acidaspis" roemeri Barrande (1852); genus also includes "Odontopleura" dormitzeri Hawle & Corda (1847) and "Odontopleura" dumortieri Hawle & Corda (1847). |
|||
|
Gen. et sp. nov |
Valid |
Geyer |
Cambrian (Wuliuan) |
Tannenknock Formation |
A member of Ptychopariida belonging to the group Ptychopariacea. The type species is C. parablepta. |
|||
|
Sp. nov |
Valid |
Geyer |
Cambrian (Wuliuan) |
Tannenknock Formation |
A member of Ptychopariida belonging to the group Ptychopariacea. |
|||
|
Sp. nov |
Valid |
Alberti |
Devonian |
Rupbach Shale |
A member of the family Odontopleuridae. |
|||
|
Sp. nov |
Valid |
Alberti |
Devonian |
Rupbach Shale |
A member of the family Odontopleuridae. |
|||
|
Gen. et comb. et sp. nov |
Valid |
Geyer |
Cambrian |
Coulouma Formation |
A member of the family Conocoryphidae. The type species is "Conocoryphe" levyi Munier-Chalmas & Bergeron in Bergeron (1889); genus also includes "Bailiella levyi" bondoni Termier & Termier (1950), "Bailiella" griffei Courtessole (1967), "Bailiella" meridiana Sdzuy (1958), "Bailiella" seguieri Courtessole (1973), "Bailiella" sepulcra Álvaro & Vizcaïno (2018), "Bailiella" souchoni Courtessole (1967), as well as new species C. lemdadensis. |
|||
|
Sp. nov |
Valid |
Geyer |
Cambrian (Wuliuan) |
Tannenknock Formation |
A member of the family Eodiscidae, placed by Geyer (2024) within Trilobita rather than Agnostida.[119] |
|||
|
Gen. et comb. nov |
Valid |
Geyer |
Cambrian |
Alum Shale Formation |
A member of the family Conocoryphidae. The type species is "Conocoryphe" emarginata Linnarsson (1877); genus also includes "Bailiella" cobboldi Resser (1936), "Bailiella" comleyensis Resser (1936), "Bailiella" froeensis Westergård (1950), "Conocoryphe" impressa Linnarsson (1879), "Conocoryphe emarginata" var. longifrons Cobbold (1911), "Conocoryphe" lyelli Hicks (1871) and "Conocoryphe" tenuicincta Linnarsson (1879). |
|||
|
Sp. nov |
Valid |
Johnson |
Devonian |
Achguig Group |
A member of Harpetida belonging to the family Harpetidae. |
|||
|
Nom. et comb. et sp. nov |
Valid |
Geyer |
Cambrian |
A member of the family Solenopleuridae; a replacement name for Herse Hawle & Corda (1847). The type species is "Herse" neubergi Hawle & Corda (1847); genus also includes "Parasolenopleura" parabolica Geyer (2017), "Parasolenopleura" wurmi Geyer (2017), "Parasolenopleura" lemdadensis Geyer (1998), "Solenopleura" cristata Linnarsson (1877), "Bathyurus" gregarius Billings (1865) and "Solenopleura" pauperata Walcott (1906), as well as new species E. marionae. |
||||
|
Sp. nov |
Valid |
Hopkins & Martin |
Ordovician |
Neuville Formation |
||||
|
Sp. nov |
Valid |
Johnson |
Devonian |
Er Remlia Formation |
A member of Harpetida belonging to the family Harpetidae. |
|||
|
Sp. nov |
Valid |
Fortey, Vargas-Parra & Droser |
Ordovician |
A member of the family Raphiophoridae. |
||||
|
Sp. nov |
Valid |
Johnson |
Devonian |
El Otfal Formation |
A member of Harpetida belonging to the family Harpetidae. |
|||
|
Harpes lahceni[124] |
Sp. nov |
Valid |
Johnson |
Devonian |
El Otfal Formation |
A member of Harpetida belonging to the family Harpetidae. |
||
|
Harpes lentigo[124] |
Sp. nov |
Valid |
Johnson |
Devonian |
Tazoulait Formation |
A member of Harpetida belonging to the family Harpetidae. |
||
|
Harpes oudris[124] |
Sp. nov |
Valid |
Johnson |
Devonian |
El Otfal Formation |
A member of Harpetida belonging to the family Harpetidae. |
||
|
Harpes prescheri[124] |
Sp. nov |
Valid |
Johnson |
Devonian |
Er Remlia Formation |
A member of Harpetida belonging to the family Harpetidae. |
||
|
Harpes sphenocephalus[124] |
Sp. nov |
Valid |
Johnson |
Devonian |
Er Remlia Formation |
A member of Harpetida belonging to the family Harpetidae. |
||
|
Harpes supercilium[124] |
Sp. nov |
Valid |
Johnson |
Devonian |
El Otfal Formation |
A member of Harpetida belonging to the family Harpetidae. |
||
|
Sp. nov |
Valid |
Johnson |
Devonian |
A member of Harpetida belonging to the family Harpetidae. |
||||
|
Sp. nov |
Valid |
Alberti |
Devonian |
Rupbach Shale |
A member of the family Odontopleuridae. |
|||
|
Sp. nov |
Valid |
Van Viersen |
Devonian |
A member of the family Odontopleuridae. |
||||
|
Sp. nov |
Valid |
Johnson |
Devonian |
Ihandar Formation |
A member of Harpetida belonging to the family Harpetidae. |
|||
|
Sp. nov |
Valid |
Geyer |
Cambrian |
Tannenknock Formation |
A member of the family Ellipsocephalidae. |
|||
|
Sp. nov |
Valid |
Geyer |
Cambrian (Wuliuan) |
Tannenknock Formation |
A member of the family Ellipsocephalidae. |
|||
|
Sp. nov |
Valid |
Geyer |
Cambrian (Wuliuan) |
Tannenknock Formation |
A member of the family Ellipsocephalidae. |
|||
|
Sp. nov |
Valid |
Sundberg, Cothren & Dehler |
Cambrian |
Nounan Formation |
A member of the family Kingstoniidae. |
|||
|
Sp. nov |
Valid |
Alberti |
Devonian |
Rupbach Shale |
A member of the family Odontopleuridae. |
|||
|
Sp. nov |
Valid |
Geyer |
Cambrian (Wuliuan) |
Tannenknock Formation |
A member of the family Ellipsocephalidae. |
|||
|
Sp. nov |
Tang et al. |
Carboniferous |
||||||
|
Sp. nov |
Valid |
Johnson |
Devonian |
Tazoulait Formation |
A member of Harpetida belonging to the family Harpetidae. |
|||
|
Lioharpes galea[124] |
Sp. nov |
Valid |
Johnson |
Devonian |
Ihandar Formation |
A member of Harpetida belonging to the family Harpetidae. |
||
|
Lioharpes morocconensis[124] |
Sp. nov |
Valid |
Johnson |
Devonian |
Boutiskaouine Formation |
A member of Harpetida belonging to the family Harpetidae. |
||
|
Lioharpes saredra[124] |
Sp. nov |
Valid |
Johnson |
Devonian |
Probably Boutiskaouine Formation |
A member of Harpetida belonging to the family Harpetidae. |
||
|
Lioharpes scopulum[124] |
Sp. nov |
Valid |
Johnson |
Devonian |
Probably Ihandar Formation |
A member of Harpetida belonging to the family Harpetidae. |
||
|
Sp. nov |
Valid |
Ghobadi Pour, Popov & Kebria-ee Zadeh |
Cambrian (Furongian) |
Mila Formation |
A member of Asaphida belonging to the family Ceratopygidae. |
|||
|
Gen. et 9 sp. et comb. nov |
Valid |
Johnson |
Devonian (Pragian to Emsian) |
Ihandar Formation |
A member of Harpetida belonging to the family Harpetidae. The types species is M. hammii; genus also includes new species M. azmamarensis, M. forteyi, M. ihmadii, M. laatchanensis, M. minutipunctus, M. oufatenensis, M. terridus and M. zguidensis, as well as "Harpes" rouvillei Frech (1887) and "Harpes" sculptus Hawle & Corda (1847). |
|||
|
Sp. nov |
Valid |
Ghobadi Pour, Popov & Kebria-ee Zadeh |
Cambrian (Furongian) |
Mila Formation |
A member of Asaphida belonging to the family Asaphidae. |
|||
|
Sp. nov |
Valid |
Webster in Webster & Caron |
Eager Formation |
A member of the family Olenellidae. |
||||
|
Sp. nov |
Valid |
Flick & Flick |
Devonian |
A member of Proetida belonging to the family Aulacopleuridae. |
||||
|
Sp. nov |
Valid |
Flick & Flick |
Devonian |
A member of Proetida belonging to the family Aulacopleuridae. |
||||
|
Ssp. nov |
Valid |
Flick |
Devonian |
A member of Proetida belonging to the family Aulacopleuridae. |
||||
|
Sp. nov |
Valid |
Flick |
Devonian |
A member of Proetida belonging to the family Aulacopleuridae. |
||||
|
Sp. nov |
Valid |
Alberti |
Devonian |
Rupbach Shale |
A member of the family Lichidae. |
|||
|
Gen. et 8 sp. et comb. nov |
Valid |
Johnson |
Devonian (Emsian to Eifelian) |
El Otfal Formation |
A member of Harpetida belonging to the family Harpetidae. The types species is P. segaouii; genus also includes new species P. apteros, P. chaperon, P. hannabouensis, P. haustrum, P. igaouii, P. merzaneensis and P. torquis, as well as "Harpes" hamarlaghdadensis Crônier et al. (2018) and probably also "Harpes" fornicatus Novák (1890) and "Harpes" pygmaeus Lütke (1965). |
|||
|
Gen. et comb. et 2 sp. nov |
Valid |
Geyer |
Cambrian |
Jbel Wawrmast Formation |
A member of the family Conocoryphidae. The type species is "Bailiella" dilatata Geyer (1998); genus also includes new species P. max and P. moritz. |
|||
|
Sp. nov |
Valid |
Geyer |
Cambrian (Wuliuan) |
Tannenknock Formation |
A member of the family Ellipsocephalidae. |
|||
|
Sp. nov |
Valid |
Fortey, Vargas-Parra & Droser |
Ordovician |
Al Rose Formation |
A member of the family Nileidae. |
|||
|
Nom. nov |
Valid |
Geyer |
Cambrian |
Andrarum Limestone Bed |
A member of the family Solenopleuridae; a replacement name for Solenopleura conifrons Westergård (1953). |
|||
|
Sp. nov |
Valid |
Leidi et al. |
Ordovician (Katian) |
A member of the family Encrinuridae. |
||||
|
Gen. et 4 sp. et comb. nov |
Valid |
Johnson |
Devonian (Lochkovian to Eifelian) |
A member of Harpetida belonging to the family Harpetidae. The types species is S. rissaniensis; genus also includes new species S. calceolus, S. capricornus and S. retiarius, as well as "Kielania" obuti Pribyl & Vanek (1986) and "Harpes" convexus Hawle & Corda (1847). |
||||
|
Sp. nov |
Valid |
Sepúlveda et al. |
Cambrian Stage 4 |
Soleras Formation |
A member of Redlichiida belonging to the group Ellipsocephaloidea and the family Ellipsocephalidae. |
|||
|
Sp. nov |
Valid |
Van Viersen & Müller |
Devonian (Emsian) |
A member of the family Proetidae. |
||||
| Triarthrus novoaustralis[133] | Sp. nov | Valid | Smith et al. | Ordovician (Katian) | Malachis Hill Formation |  Australia |
A member of Ptychopariida belonging to the family Olenidae | |
|
Sp. nov |
Valid |
Pereira, Rábano & Gutiérrez-Marco |
Ordovician (Katian) |
|||||
|
Sp. nov |
Valid |
Webster in Webster & Caron |
Cambrian Stage 4 |
Eager Formation |
A member of Olenelloidea belonging to the family Wanneriidae. |
|||
|
Gen. et sp. nov |
Valid |
Randolfe & Gass |
Silurian (Telychian) |
A member of the family Dalmanitidae. The type species is W. eatonae. |
 | |||
Trilobite research
- Drage (2024) finds evidence of only minor differences in morphometry between trilobites displaying different modes of moulting.[136]
- Trilobite fossil material from the Tiout section in Morocco, representing the first occurrence of trilobites in West Gondwana and some of the oldest trilobite fossils in general, is determined to be approximately 519.62-million-years-old by Sinnesael, Millard & Smith (2024).[137]
- El Albani et al. (2024) report the discovery of exceptionally preserved trilobite specimens from the Cambrian Tatelt Formation (Morocco) fossilized through rapid ash burial caused by underwater pyroclastic flow, providing new information on the trilobite anatomy.[138]
- A study on the growth and development of Sahtuia carcajouensis and Mackenzieaspis parallelispinosa from the Cambrian Mount Cap Formation (Canada) is published by Handkamer & Pratt (2024), who report evidence of decrease in the number of episodes of segment release in both taxa, possibly as a result of local environmental conditions.[139]
- Singla et al. (2024) demarcate the stratigraphic thickness of the Oryctocephalus salteri biozone in the Cambrian (Wuliuan) Parahio Member of the Kunzam La Formation in the Spiti region, preserving diverse trilobite fossils, and correlate the O. salteri biozone of the Kunzam La Formation with the Tonkinella-Hundwarella bearing level of the Nutunus Formation in the Kashmir region.[140]
- Evidence interpreted as indicative of a direct link between the spread of low-oxygen conditions in shallow-water settings and the turnover of trilobites from the North China Platform during the Steptoean positive carbon isotope excursion is presented by Yang et al. (2024).[141]
- A study on the affinities of harpetid and trinucleioid trilobites is published by Beech, Bottjer & Smith (2024), who argue that the body plan with a wide, flattened cephalic brim or fringe evolved independently in the two groups, and interpret trinucleids as likely specialized asaphids.[142]
- Evidence from the study of soft-bodied specimens of Olenoides serratus and Triarthrus eatoni, interpreted as indicating that trilobites had five pairs of cephalic appendages, is presented by Hou & Hopkins (2024).[143]
- Hopkins, Gutiérrez-Marco & Di Silvestro (2024) describe fossil material of Leptoplastides salteri from the Fezouata Formation (Morocco), extending known range of this species from Avalonia into Gondwana.[144]
- Losso & Ortega-Hernández (2024) describe the appendages of Ceraurus pleurexanthemus and Flexicalymene senaria from the Walcott–Rust quarry (New York, United States) and report close morphological similarity of the exopodite structure in C. pleurexanthemus and Anacheirurus adserai in spite of the two species living in different environments and being separated by 20 million years.[145]
- Specimens of Dalmanitina socialis preserved with remains of the alimentary tract are described from the Ordovician Letná Formation (Czech Republic) by Fatka, Budil & Mikuláš (2024).[146]
- Bicknell et al. (2024) describe a specimen of Toxochasmops vormsiensis from the Katian Kõrgessaare Formation (Estonia) preserved molted within the body chamber of a nautiloid cephalopod Gorbyoceras textumaraneum, representing the first known record of cryptic molting of pterygometopid trilobites.[147]
- Evidence indicating that two peaks of in trilobite cephalic shape diversity in the Ordovician and the Devonian were caused by different underlying mechanisms is presented by Drage & Pates (2024).[148]
- A study on the biogeography of Cheirurina during the Ordovician is published by Pérez-Peris, Adrain & Daley (2024).[149]
- Bicknell, Smith & Miller-Camp (2024) and Bicknell, Smith & Hopkins (2024) revise the record of trilobite specimens with malformations from the collections of the Indiana University[150] and the American Museum of Natural History.[151]
- A study on the phylogenetic relationships of cheirurine, deiphonine and "cyrtometopine" cheirurids is published by Pérez-Peris, Adrain & Daley (2024).[152]
