2024 in arthropod paleontology

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.

Chelicerates

Arachnids

Araneae

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes	Images
Acanthomacrothele [1]	Gen. et 3 sp. nov		Wang et al.	Cretaceous	Burmese amber	Myanmar	A member of the family Macrothelidae. Genus includes new species A. pauciverrucae, A. geminata and A. longicaudata.
Anameta tertia [2]	Sp. nov	Valid	Wunderlich	Eocene	Baltic amber	Europe (Baltic Sea region)	A possible long-jawed orb weaver.
?Bararaneus rotundus [2]	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]
Breviscauda [3]	Gen. et sp. nov	Valid	Wunderlich	Cretaceous	Burmese amber	Myanmar	A tree trunk spider. The type species is B. translucens.
Lineaburmops longiantepes [4]	Sp. nov		Guo, Selden & Ren in Guo et al.	Late Cretaceous (Cenomanian)	Burmese amber	Myanmar	A spider belonging to the family Lagonomegopidae.
Lineaburmops rhombus [4]	Sp. nov		Guo et al.	Late Cretaceous (Cenomanian)	Burmese amber	Myanmar	A spider belonging to the family Lagonomegopidae.
Longissipalpus albistriatus [5]	Sp. nov	Valid	Hou et al.	Cretaceous	Burmese amber	Myanmar	A spider belonging to the family Pholcochyroceridae.
Mengesilia [2]	Gen. et sp. nov	Valid	Wunderlich	Eocene	Rovno amber	Ukraine	A tree trunk spider. The type species is M. rovnoensis.
Myrmarachne colombiana [6]	Sp.nov		Poinar	Quaternary	Colombian Amber	Colombia	An ant-mimick spider. Originally described as a species of Myrmarachne ; Perger (2024) transferred it to the genus Myrmecium . [7]
Parvosegestria elegans [3]	Sp. nov	Valid	Wunderlich	Cretaceous	Burmese amber	Myanmar	A possible tube-dwelling spider.
Pedipalparaneus protumidus [5]	Sp. nov	Valid	Hou et al.	Cretaceous	Burmese amber	Myanmar	A spider belonging to the family Pholcochyroceridae.
Pholcophora gregorioi [8]	Sp. nov		García-Villafuerte, Carbot-Chanona & Gómez-Pérez	Miocene	Mexican amber	Mexico	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
Deinocroton bicornis [10]	Sp. nov	Valid	Chitimia-Dobler, Dunlop & Mans in Chitimia-Dobler et al.	Cretaceous	Burmese amber	Myanmar	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	Myanmar	A tick belonging to the family Nuttalliellidae.
Legionaris [10]	Gen. et sp. nov	Valid	Chitimia-Dobler, Dunlop & Mans in Chitimia-Dobler et al.	Cretaceous	Burmese amber	Myanmar	A tick belonging to the family Nuttalliellidae. The type species is L. robustus.
Nuttalliella gratae [10]	Sp. nov	Valid	Chitimia-Dobler, Dunlop & Mans in Chitimia-Dobler et al.	Cretaceous	Burmese amber	Myanmar	A species of Nuttalliella .
Nuttalliella odyssea [10]	Sp. nov	Valid	Chitimia-Dobler, Dunlop & Mans in Chitimia-Dobler et al.	Cretaceous	Burmese amber	Myanmar	A species of Nuttalliella.
Nuttalliella placaventrala [10]	Sp. nov	Valid	Chitimia-Dobler, Dunlop & Mans in Chitimia-Dobler et al.	Cretaceous	Burmese amber	Myanmar	A species of Nuttalliella.
Nuttalliella tropicasylvae [10]	Sp. nov	Valid	Chitimia-Dobler, Dunlop & Mans in Chitimia-Dobler et al.	Cretaceous	Burmese amber	Myanmar	A species of Nuttalliella.
Nuttalliella tuberculata [10]	Sp. nov	Valid	Chitimia-Dobler, Dunlop & Mans in Chitimia-Dobler et al.	Cretaceous	Burmese amber	Myanmar	A species of Nuttalliella.

Opiliones

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes	Images
?Leiobunum messelense [11]	Sp. nov	Valid	Bartel, Dunlop & Wedmann	Eocene	Messel pit	Germany	Possibly a species of Leiobunum .
?Leiobunum schaali [11]	Sp. nov	Valid	Bartel, Dunlop & Wedmann	Eocene	Messel pit	Germany	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
Cretogarypinus [13]	Gen. et sp. nov	Valid	Sánchez-García et al.	Early Cretaceous (Albian)	Escucha Formation	Spain	A member of the family Garypinidae. The type species is C. zaragozai.
Geogaranya [14]	Gen. et sp. nov	Valid	Agnihotri et al.	Eocene	Cambay Basin	India	A member of the family Geogarypidae. The type species is G. valiyaensis.
Hya fynni [15]	Sp. nov	Valid	Röschmann et al.	Late Cretaceous (Cenomanian)	Burmese amber	Myanmar	A member of the family Hyidae.
Hysterochelifer manpauch [16]	Sp. nov		Córdova-Tabares et al.	Miocene	Mexican amber	Mexico	A member of the family Cheliferidae.
Ithioreolpium [13]	Gen. et sp. nov	Valid	Sánchez-García et al.	Early Cretaceous (Albian)	Escucha Formation	Spain	A member of the family Garypinidae. The type species is I. alavensis.

Sarcoptiformes

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes	Images
Collohmannia albertii [17]	Sp. nov	Valid	Kolesnikov, Vorontsov & Sidorchuk	Eocene	Baltic amber	Europe (Baltic Sea region)	A member of Oribatida belonging to the family Collohmanniidae.
Collohmannia clavata [17]	Sp. nov	Valid	Kolesnikov, Vorontsov & Sidorchuk	Eocene	Baltic amber	Europe (Baltic Sea region)	A member of Oribatida belonging to the family Collohmanniidae.
Collohmannia groehni [17]	Sp. nov	Valid	Kolesnikov, Vorontsov & Sidorchuk	Eocene	Baltic amber	Europe (Baltic Sea region)	A member of Oribatida belonging to the family Collohmanniidae.
Collohmannia kerneggeri [17]	Sp. nov	Valid	Kolesnikov, Vorontsov & Sidorchuk	Eocene	Baltic amber	Europe (Baltic Sea region)	A member of Oribatida belonging to the family Collohmanniidae.
Collohmannia nortoni [17]	Sp. nov	Valid	Kolesnikov, Vorontsov & Sidorchuk	Eocene	Baltic amber	Europe (Baltic Sea region)	A member of Oribatida belonging to the family Collohmanniidae.
Collohmannia sellnicki [17]	Sp. nov	Valid	Kolesnikov, Vorontsov & Sidorchuk	Eocene	Baltic amber	Europe (Baltic Sea region)	A member of Oribatida belonging to the family Collohmanniidae.
Collohmannia weiterschani [17]	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
Betaburmesebuthus thomasvelteni [19]	Sp. nov	Valid	Lourenço in Lourenço & Velten	Cretaceous	Burmese amber	Myanmar	A member of Buthoidea belonging to the family Palaeoburmesebuthidae
Burmesescorpiops velteni [20]	Sp. nov	Valid	Lourenço	Cretaceous	Burmese amber	Myanmar	A member of the family Palaeoeuscorpiidae.
Chaerilobuthus petersi [21]	Sp. nov	Valid	Lourenço in Lourenço & Velten	Cretaceous	Burmese amber	Myanmar	A member of the family Chaerilobuthidae or Pseudochactidae. [22]
Chaerilobuthus staxi [23]	Sp. nov	Valid	Lourenço in Lourenço & Velten	Cretaceous	Burmese amber	Myanmar	A member of the family Chaerilobuthidae or Pseudochactidae. [22]
Paranotaburmesebuthus [24]	Gen. et sp. nov	Valid	Lourenço in Lourenço & Velten	Cretaceous	Burmese amber	Myanmar	A member of Buthoidea belonging to the family Palaeoburmesebuthidae. The type species is P. schmidti.
Serratochaerilobuthus [25]	Gen. et sp. nov	Disputed	Lourenço in Lourenço & Velten	Cretaceous	Burmese amber	Myanmar	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]

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
Pararesinacarus krczali [28]	Sp. nov	Valid	Khaustov et al.	Eocene	Rovno amber	Ukraine	A mite belonging to the family Resinacaridae.
Resinacarus longipilis [28]	Sp. nov	Valid	Khaustov et al.	Eocene	Rovno amber	Ukraine	A mite belonging to the family Resinacaridae.
Resinacarus striatus [28]	Sp. nov	Valid	Khaustov et al.	Eocene	Rovno amber	Ukraine	A mite belonging to the family Resinacaridae.
Resinacarus vitzthumi [28]	Sp. nov	Valid	Khaustov et al.	Eocene	Rovno amber	Ukraine	A mite belonging to the family Resinacaridae.
Rhombometridium [29]	Gen. et sp. nov	Valid	Khaustov, Vorontsov & Lindquist	Cretaceous	Burmese amber	Myanmar	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
Mesoproctus rayoli [31]	Sp. nov	Valid	Santana et al.	Early Cretaceous (Aptian—Albian)	Crato Formation	Brazil	A whip scorpion belonging to the family Thelyphonidae.

Other arachnids

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes	Images
Douglassarachne [32]	Gen. et sp. nov	Valid	Selden & Dunlop	Carboniferous (Pennsylvanian)	Mazon Creek fossil beds	United States ( Illinois)	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
Qujingopterus [35]	Gen. et sp. nov		Ma et al.	Devonian	Xitun Formation	China	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
Titanoprosoma [44]	Gen. et sp. nov	Valid	Bicknell et al.	Carboniferous (Serpukhovian)	Bear Gulch Limestone	United States ( Montana)	A member of Euchelicerata of uncertain affinities. The type species is T. edgecombei.
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
Aguadites [49]	Gen. et sp. nov		Vega, Garassino, Nyborg & Pasini in Vega et al.	Late Cretaceous		Cuba	A raninoid crab. The type species is A. hexagranula.
Binkhorstia desaegheri [50]	Sp. nov	Valid	Van Bakel et al.	Late Cretaceous (Santonian)	Vaals Formation	Belgium	A crab belonging to the superfamily Retroplumoidea and the family Binkhorstiidae.
Bournelyreidus grahamae [51]	Sp. nov	Valid	Nyborg et al.	Late Cretaceous (Campanian)	Northumberland Formation	Canada ( British Columbia)	A raninoid crab.
Calverteca [52]	Gen. et sp. nov	Valid	Godfrey, Feldmann & Schweitzer	Miocene	Calvert Formation	United States ( Virginia)	An isopod belonging to the family Cymothoidae. The type species is C. osbornei.
Carcinoplax jonica [53]	Sp. nov	Valid	Garassino & Pasini in Girone et al.	Pleistocene		Italy	A crab belonging to the family Goneplacidae.
Cretagourretia [54]	Gen. et sp. nov	Valid	Ossó, Charbonnier, Hyžný, van Bakel & Devillez in Ossó et al.	Early Cretaceous (Albian)	Escucha Formation	Spain	A member of the family Ctenochelidae. The type species is C. salasi.
Distefania buerai [55]	Sp. nov	Valid	Ossó et al.	Late Cretaceous (Cenomanian)	Picofrentes Formation	Spain	A crab belonging to the family Dromiidae and the subfamily Goniodromitinae.
Dugastella nitida [56]	Comb. nov	Valid	(Milne-Edwards)	Oligocene (Chattian)		France	A shrimp belonging to the family Atyidae; moved from Caridina nitida Milne-Edwards (1879).
Eoactinotocarcinus [57]	Gen. et comb. nov	Valid	Ferratges	Eocene	Roda Formation	Spain	A crab belonging to the subfamily Actinotocarcininae. The type species is "Periacanthus" tetracornis Ferratges et al. (2014)
Eogmelina [58]	Gen. et 2 sp. nov	Valid	Copilaş-Ciocianu & Ionesi	Miocene		Romania	An amphipod belonging to the family Gammaridae. The type species is E. moldavica; genus also includes E. prisca.
Faksecarcinus prealpinus [59]	Sp. nov	Valid	De Angeli & Lovato	Eocene		Italy	A crab belonging to the group Portunoidea.
Halicarcinus popeius [60]	Sp. nov	Valid	Gašparič et al.	Oligocene (Chattian)	Trbovlje Formation	Slovenia	A crab belonging to the family Hymenosomatidae.
Icriocarcinus aldersonorum [61]	Sp. nov	Valid	Nyborg & Garassino	Late Cretaceous (Campanian)	Tuna Canyon Formation	United States ( California)	A crab belonging to the family Lithophylacidae.
Ixoides miocenicus [62]	Sp. nov		Garassino, Pasini, Mirzaie Ataabadi & Nyborg in Garassino et al.	Miocene (Tortonian)		Iran	A crab belonging to the family Leucosiidae and the subfamily Ebaliinae.
Joeranina tausi [54]	Sp. nov	Valid	Ossó, Charbonnier, Hyžný, van Bakel & Devillez in Ossó et al.	Early Cretaceous (Albian)	Escucha Formation	Spain	A crab belonging to the family Palaeocorystidae.
Lucascinus trifailensis [60]	Sp. nov	Valid	Gašparič et al.	Oligocene (Chattian)	Trbovlje Formation	Slovenia	A crab belonging to the family Hymenosomatidae.
Makrokylindrus itoi [63]	Sp. nov	Valid	Luque & Gerken	Plio-Pleistocene	Hijikata Formation	Japan	A member of the family Diastylidae.
Minohellenus grolaensis [59]	Sp. nov	Valid	De Angeli & Lovato	Eocene		Italy	A crab belonging to the group Portunoidea.
Necrocarcinus sibiricus [64]	Sp. nov		Kočová Veselská et al.	Late Cretaceous		Russia ( Krasnoyarsk Krai)	A crab belonging to the family Necrocarcinidae.
Neogoneplax bradanica [53]	Sp. nov	Valid	Garassino & Pasini in Girone et al.	Pleistocene		Italy	A crab belonging to the family Goneplacidae.
Noetlingocarcinus minutus [65]	Sp. nov	Valid	De Angeli, Ceccon & Caporiondo	Oligocene		Italy	A crab belonging to the superfamily Dromioidea and the family Basinotopidae.
Palaeobresilia [66]	Gen. et sp. nov	Valid	Winkler et al.	Late Jurassic		Germany	A shrimp belonging to the superfamily Bresilioidea. The type species is P. kurthetriegeri.
Parahyas [67]	Gen. et comb. nov	Valid	Charbonnier et al.	Miocene (Messinian)		Algeria	A crab belonging to the superfamily Majoidea and the family Oregoniidae. The type species is "Hyas" oranensis Van Straelen (1937).
Paranecrocarcinus xivertensis [54]	Sp. nov	Valid	Ossó, Charbonnier, Hyžný, van Bakel & Devillez in Ossó et al.	Early Cretaceous (Aptian)	Benassal Formation	Spain	A crab belonging to the family Necrocarcinidae.
Persianus [62]	Gen. et sp. nov		Garassino, Pasini, Mirzaie Ataabadi & Nyborg in Garassino et al.	Miocene (Tortonian)		Iran	A crab belonging to the family Portunidae. The type species is P. arcuatus.
Pilumnus pianetensis [65]	Sp. nov	Valid	De Angeli, Ceccon & Caporiondo	Oligocene		Italy	A species of Pilumnus .
Portunus bericensis [68]	Sp. nov	Valid	De Angeli & Bellin	Eocene		Italy	A species of Portunus .
Portunus planargiaensis [69]	Sp. nov	Valid	Pasini & Garassino	Miocene		Italy	A species of Portunus.
Pseudocarcinus karlraubenheimeri [70]	Sp. nov	Valid	Van Bakel & Ossó	Miocene (Tongaporutuan)	Urenui Formation	New Zealand	A relative of the Tasmanian giant crab.
Pyrenicola [71]	Gen. et comb. nov	Valid	Artal & Ossó	Paleocene and Eocene		France Spain United States ( California)	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.
Raninoides granulofrons [49]	Sp. nov		Vega, Garassino, Nyborg & Pasini in Vega et al.	Late Cretaceous		Cuba	A raninoid crab.
Rhinopterocaris fordycei [72]	Sp. nov	Valid	Liu et al.	Ordovician	Preservation Formation	New Zealand	A member of Phyllocarida belonging to the family Caryocarididae.
Rodanina [49]	Gen. et sp. nov		Vega, Garassino, Nyborg & Pasini in Vega et al.	Late Cretaceous		Cuba	A raninoid crab. The type species is R. monosensis.
Schramocaris robusta [73]	Comb. nov		(Peach)	Carboniferous (Tournaisian)	Ballagan Formation	United Kingdom	A member of the family Tealliocarididae. Moved from Tealliocaris robusta Peach (1908).
Silvacarcinus cisuralicus [74]	Sp. nov	Valid	Mychko, Schweitzer & Feldmann	Late Cretaceous (Campanian)		Russia ( Orenburg Oblast)	A crab belonging to the family Orithopsidae.
Solteria [75]	Gen. et sp. nov	Valid	Garassino et al.	Eocene		Italy	A member of Caridea. Genus includes new species S. spinosa.
Tealliocaris briggsi [73]	Sp. nov		Clark & Ross	Carboniferous (Tournaisian)	Ballagan Formation	United Kingdom	A member of the family Tealliocarididae.
Tealliocaris elliotti [76]	Sp. nov		Clark	Carboniferous (Bashkirian)		United Kingdom	A member of the family Tealliocarididae.
Tealliocaris weegie [73]	Sp. nov		Clark & Ross	Carboniferous (Mississippian)		United Kingdom	A member of the family Tealliocarididae.
Trentastacus [75]	Gen. et sp. nov	Valid	Garassino et al.	Eocene		Italy	A member of Astacida. Genus includes new species T. levis.
Tumulosternum ortegai [57]	Sp. nov	Valid	Ferratges	Eocene	Roda Formation	Spain	A crab belonging to the family Majidae.
Uncina ultima [77]	Sp. nov	Valid	Charbonnier et al.	Late Jurassic (Tithonian)		Germany	An uncinid lobster.
Venzia [75]	Gen. et sp. nov	Valid	Garassino et al.	Eocene		Italy	A member of Caridea. Genus includes new species V. ypresiana.
Vincentdromia [78]	Gen. et comb. nov	Valid	Schweitzer	Eocene (Ypresian)	Vincentown Formation	United States ( New Jersey)	A crab belonging to the family Dromiidae. The type species is "Dromiopsis" americana Roberts (1956).
Wahrania [67]	Gen. et comb. nov	Valid	Charbonnier et al.	Miocene (Messinian)		Algeria	A crab belonging to the superfamily Majoidea and the family Epialtidae. The type species is "Maia" arambourgi Van Straelen (1937).

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
Adeditia tkachovae [88]	Sp. nov		Sobolev	Devonian-Carboniferous transition		Russia	A member of the family Editiidae.
Aleisocythereis? picnus [89]	Sp. nov		Ceolin et al.	Cretaceous–Palaeogene transition		Argentina
Ampuloides thungsamedensis [90]	Sp. nov		Promduang & Chitnarin	Late Silurian -Early Devonian	Kuan Tung Formation	Thailand	A member of Podocopida belonging to the family Pachydomellidae.
Aurila hokkaidoensis [91]	Sp. nov		Mukai & Tanaka	Miocene	Kaigarabashi Formation	Japan
Batecypris [92]	Gen. et sp. nov	Valid	Almeida-Lima et al.	Early Cretaceous (Aptian)	Crato Formation	Brazil	Genus includes new species B. reticularis.
Bathoniella [93]	Gen. et comb. et 3 sp. nov	Valid	Tesakova	Middle Jurassic (Bathonian and Callovian)		Belarus Germany Russia Ukraine	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.
Blumeditia [88]	Gen. et 3 sp. nov		Sobolev	Devonian-Carboniferous transition		Russia	A member of the family Editiidae. Genus includes new species B. eleganta, B. auctus and B. pretzella.
Callistocythere imaganensis [91]	Sp. nov		Mukai & Tanaka	Miocene	Kaigarabashi Formation	Japan
Cuspicypris [94]	Nom. nov	Valid	Guillam	Early Cretaceous	Orós Formation	Brazil	A member of Cypridoidea; a replacement name for Hastacypris Filho, Fauth & Sames.
Cyprideis goeldiensis [95]	Sp. nov		Ferreira & Ramos	Neogene	Solimões Formation	Brazil
Cyprideis javariensis [95]	Sp. nov		Ferreira & Ramos	Neogene	Solimões Formation	Brazil
Cytheropterina ainsworthi [96]	Sp. nov	Valid	Cabral, Lord & Pinto in Cabral et al.	Early Jurassic (Toarcian)	Póvoa da Lomba Formation	Portugal	A member of the family Cytheruridae.
Derima [97]	Gen. et sp. nov		Siveter et al.	Silurian	Herefordshire Lagerstätte	United Kingdom	A member of Beyrichicopida belonging to the group Binodicopina and the family Bolliidae. The type species is D. paparme.
Eucytherura alvaiazerensis [96]	Sp. nov	Valid	Cabral, Lord & Pinto in Cabral et al.	Early Jurassic (Toarcian)	Póvoa da Lomba Formation	Portugal	A member of the family Cytheruridae.
Hemiparacytheridea condilomata [89]	Sp. nov		Ceolin et al.	Cretaceous–Palaeogene transition		Argentina
Hysterocythereis acuminata [89]	Sp. nov		Ceolin et al.	Cretaceous–Palaeogene transition		Argentina
Macunhaella [92]	Gen. et sp. nov	Valid	Almeida-Lima et al.	Early Cretaceous (Aptian)	Crato Formation	Brazil	Genus includes new species M. posteroaltis.
Neonesidea chapminuta [98]	Sp. nov		McDonald, Weldon & Warne	Pliocene (Zanclean)	Jemmys Point Formation	Australia	A member of the family Bairdiidae.
Oculocytheropteron jemmyensis [98]	Sp. nov		McDonald, Weldon & Warne	Pliocene (Zanclean)	Jemmys Point Formation	Australia	A member of the family Cytheruridae.
Ophektycythere [96]	Gen. et 3 sp. nov	Valid	Cabral & Lord in Cabral et al.	Jurassic (Toarcian and Aalenian)	São Gião Formation	Portugal United Kingdom	A member of the family Protocytheridae. The type species is O. herrrigi; genus also includes O. mataensis and possibly also O.? sicoensis.
Otocythere iberobritannica [96]	Sp. nov	Valid	Cabral & Lord in Cabral et al.	Early Jurassic (Toarcian)	Póvoa da Lomba Formation	Portugal United Kingdom	A member of the family Cytheruridae.
Parabathoniella [93]	Gen. et comb. nov	Valid	Tesakova	Middle Jurassic (Bathonian)		United Kingdom	A member of Podocopida belonging to the family Progonocytheridae. The type species is "Acanthocythere" elongata Wakefield (1994).
Paramunseyella stictus [89]	Sp. nov		Ceolin et al.	Cretaceous–Palaeogene transition		Argentina
Philoneptunus plutonis [98]	Sp. nov		McDonald, Weldon & Warne	Pliocene (Zanclean)	Jemmys Point Formation	Australia	A member of the family Trachyleberididae.
Procytherura praecoquum [99]	Sp. nov		Forel et al.	Late Jurassic (Oxfordian)	Terres Noires Formation	France
Proeditia auriculata dimorpha [88]	Ssp. nov		Sobolev	Devonian-Carboniferous transition		Russia	A member of the family Editiidae.
Rozhdestvenskayella [94]	Nom. nov	Valid	Guillam	Devonian (Frasnian)		Russia	A replacement name for Ornatella Rozhdestvenskaya in Chibrikova & Rozhdestvenskaya (1959).
Rudolfestatscaphium [100]	Nom. nov		Li	Silurian		Germany	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.
Tasmanocypris salaputia [98]	Sp. nov		McDonald, Weldon & Warne	Pliocene (Zanclean)	Jemmys Point Formation	Australia	A member of the family Candonidae.
Theriosynoecum favus [92]	Sp. nov	Valid	Almeida-Lima et al.	Early Cretaceous (Aptian)	Crato Formation	Brazil
Timiriasevia aratra [92]	Sp. nov	Valid	Almeida-Lima et al.	Early Cretaceous (Aptian)	Crato Formation	Brazil
Wangshangkia jiwozhaiensis [101]	Sp. nov		Song in Song et al.	Devonian (Givetian)	Dushan Formation	China	A member of Podocopida belonging to the superfamily Bairdiocypridoidea and the family Bairdiocyprididae.
Wolburgiopsis magnafossa [92]	Sp. nov	Valid	Almeida-Lima et al.	Early Cretaceous (Aptian)	Ipubi Formation	Brazil

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). ^[102]
• Taxonomic revision of ostracods from the Lower Cretaceous Codó Formation (Brazil) is published by Coimbra & Petró (2024). ^[103]
• 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). ^[104]

Thecostracans

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes	Images
Eolepas moorei [105]	Sp. nov	Valid	Gale	Late Triassic (Rhaetian)	Westbury Formation	United Kingdom	A barnacle belonging to the family Eolepadidae.
Icenilepas norvicensis [105]	Sp. nov	Valid	Gale	Late Cretaceous (Campanian)		United Kingdom	A barnacle.
Leweslepas cultellum [105]	Sp. nov	Valid	Gale	Late Cretaceous (Coniacian or Santonian)		United Kingdom	A barnacle.
Nitidalepas [105]	Gen. et comb. et sp. nov	Valid	Gale	Cretaceous		United Kingdom	A barnacle. The type species is "Arcoscalpellum" transversum Withers (1935); genus also includes new species N. dibleyi.
Parastramentum cenomanense [105]	Sp. nov	Valid	Gale	Late Cretaceous (Cenomanian)	Zig Zag Chalk Formation	United Kingdom	A barnacle.
Subsecolepas dubrisiensis [105]	Sp. nov	Valid	Gale	Late Cretaceous (Cenomanian)	Zig Zag Chalk Formation	United Kingdom	A barnacle.
Subsecolepas paulsgrovensis [105]	Sp. nov	Valid	Gale	Late Cretaceous (Campanian)	Newhaven Formation	United Kingdom	A barnacle.
Zeugmatolepas capelensis [105]	Sp. nov	Valid	Gale	Early Cretaceous (Hauterivian)	Weald Clay	United Kingdom	A barnacle.
Zeugmatolepas eocenica [105]	Sp. nov	Valid	Gale	Eocene (Lutetian)	Selsey Formation	United Kingdom	A barnacle.
Zeugmatolepas gaultinum [105]	Sp. nov	Valid	Gale	Early Cretaceous (Albian)	Gault Clay	United Kingdom	A barnacle.
Zeugmatolepas vectensis [105]	Sp. nov	Valid	Gale	Early Cretaceous (Aptian)	Vectis Formation	United Kingdom	A barnacle.

Other crustaceans

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes	Images
Cornia wasvilrensis [106]	Sp. nov	Valid	Poschmann et al.	Devonian	Klerf Formation	Germany	A clam shrimp.
Eicheleaia [106]	Gen. et sp. nov	Valid	Poschmann et al.	Devonian	Klerf Formation	Germany	A clam shrimp. The type species is E. wenndorfi.
Grauvogelocaris [107]	Gen. et sp. nov	Valid	Geyer, Hegna & Kelber	Triassic (Anisian)	Grès à Voltzia	France	A member of the stem lineage of Diplostraca. The type species is G. alsatica.
Jurapingquania [108]	Nom. nov	Valid	Ceccolini & Cianferoni	Late Jurassic	Tuchengzi Formation	China	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.
Olesenocaris [107]	Gen. et sp. nov	Valid	Geyer, Hegna & Kelber	Triassic (Anisian)	Grès à Voltzia	France	A non-calmanostracan phyllopod, possibly belonging to the stem lineage of Diplostraca. The type species is O. galli.
Palaeolimnadiopsis frankeorum [106]	Sp. nov	Valid	Poschmann et al.	Devonian		Germany	A clam shrimp.
Punctatestheria yaojieensis [109]	Sp. nov	Valid	Xue & Li	Middle–Late Jurassic	Yaojie Formation	China	A clam shrimp.
Shipingia luchangensis [110]	Comb. nov		(Chen)	Late Triassic (Rhaetian)		China	A clam shrimp. Originally described as Euestheria? luchangensis Chen (1974).
Triglypta hebeiensis [111]	Sp. nov	Valid	Liao & Huang in Liao et al.	Middle Jurassic (Callovian)	Longmen Formation	China	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). ^[112]

Insects

Main article: 2024 in paleoentomology

Radiodonts

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes	Images
Shucaris ankylosskelos [113]	Gen. et sp. nov	Valid	Wu et al.	Cambrian Stage 3	Maotianshan Shales	China	A radiodont of uncertain phylogenetic placement. The type species is S. ankylosskelos.
Stanleycaris qingjiangensis [114]	Sp. nov	Valid	Wu et al.	Cambrian Stage 3	Qingjiang Lagerstätte	China	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
Alatacastava [115]	Gen. et comb. nov	Valid	Van Viersen & Müller	Devonian (Pragian–Emsian transition)	Abadía Formation	France Luxembourg Spain	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).
Andalusiana palaciosi [116]	Sp. nov	Valid	Sepúlveda et al.	Cambrian Stage 4	Soleras Formation	Spain	A member of Redlichiida belonging to the group Olenellina.
Arduennella janseni [115]	Sp. nov	Valid	Van Viersen & Müller	Devonian (Emsian)		Luxembourg	A member of the family Homalonotidae.
Bienvillia eurekensis [117]	Sp. nov	Valid	Taylor, Loch & Repetski	Cambrian (Furongian)	Windfall Formation	United States ( Nevada)	A member of the family Olenidae.
Bailiella marginalis [118]	Sp. nov	Valid	Geyer	Cambrian (Drumian)	Lippertsgrün Formation	Germany	A member of the family Conocoryphidae.
Bailiella niuxinshanensis [118]	Sp. nov	Valid	Geyer	Cambrian	Changia Formation	China	A member of the family Conocoryphidae.
Balticoglaucus [118]	Gen. et comb. nov	Disputed	Geyer	Cambrian	Alum Shale Formation	Sweden	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. [119]
Balticomerope [118]	Gen. et comb. et sp. nov	Disputed	Geyer	Cambrian	Alum Shale Formation	Denmark Russia Sweden	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. [119]
Branikarges? nodifrons [120]	Sp. nov	Valid	Alberti	Devonian	Rupbach Shale	Germany	A member of the family Lichidae.
Bromella utahensis [121]	Sp. nov	Valid	Sundberg, Cothren & Dehler	Cambrian	Nounan Formation	United States ( Utah)	A member of the family Aphelaspididae.
Bruthansovaspis [122]	Gen. et comb. nov	Valid	Van Viersen	Silurian	Motol Formation	Czech Republic	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).
Cambrodaimona [118]	Gen. et sp. nov	Valid	Geyer	Cambrian (Wuliuan)	Tannenknock Formation	Germany	A member of Ptychopariida belonging to the group Ptychopariacea. The type species is C. parablepta.
Cambrophatictor meieri [118]	Sp. nov	Valid	Geyer	Cambrian (Wuliuan)	Tannenknock Formation	Germany	A member of Ptychopariida belonging to the group Ptychopariacea.
Ceratocephala horrida [120]	Sp. nov	Valid	Alberti	Devonian	Rupbach Shale	Germany	A member of the family Odontopleuridae.
Charybdaspis steinsbergensis [120]	Sp. nov	Valid	Alberti	Devonian	Rupbach Shale	Germany	A member of the family Odontopleuridae.
Courtessolia [118]	Gen. et comb. et sp. nov	Valid	Geyer	Cambrian	Coulouma Formation	France Morocco Spain	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.
Dawsonia densiserrata [118]	Sp. nov	Valid	Geyer	Cambrian (Wuliuan)	Tannenknock Formation	Germany	A member of the family Eodiscidae, placed by Geyer (2024) within Trilobita rather than Agnostida. [118]
Emarginobailiella [118]	Gen. et comb. nov	Valid	Geyer	Cambrian	Alum Shale Formation	Denmark Sweden United Kingdom	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).
Eskoharpes sicarius [123]	Sp. nov	Valid	Johnson	Devonian	Achguig Group	Morocco	A member of Harpetida belonging to the family Harpetidae.
Exapinepiphania [118]	Nom. et comb. et sp. nov	Valid	Geyer	Cambrian		Canada China Czech Republic Germany Morocco Sweden	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.
Flexicalymene trentonensis [124]	Sp. nov	Valid	Hopkins & Martin	Ordovician	Neuville Formation	Canada ( Quebec) United States ( New York)
Fritchaspis edgecombei [123]	Sp. nov	Valid	Johnson	Devonian	Er Remlia Formation	Morocco	A member of Harpetida belonging to the family Harpetidae.
Globampyx sexsegmentatus [125]	Sp. nov	Valid	Fortey, Vargas-Parra & Droser	Ordovician	Al Rose Formation	United States ( California)	A member of the family Raphiophoridae.
Harpes boudibensis [123]	Sp. nov	Valid	Johnson	Devonian	El Otfal Formation	Morocco	A member of Harpetida belonging to the family Harpetidae.
Harpes lahceni [123]	Sp. nov	Valid	Johnson	Devonian	El Otfal Formation	Morocco	A member of Harpetida belonging to the family Harpetidae.
Harpes lentigo [123]	Sp. nov	Valid	Johnson	Devonian	Tazoulait Formation	Morocco	A member of Harpetida belonging to the family Harpetidae.
Harpes oudris [123]	Sp. nov	Valid	Johnson	Devonian	El Otfal Formation	Morocco	A member of Harpetida belonging to the family Harpetidae.
Harpes prescheri [123]	Sp. nov	Valid	Johnson	Devonian	Er Remlia Formation	Morocco	A member of Harpetida belonging to the family Harpetidae.
Harpes sphenocephalus [123]	Sp. nov	Valid	Johnson	Devonian	Er Remlia Formation	Morocco	A member of Harpetida belonging to the family Harpetidae.
Harpes supercilium [123]	Sp. nov	Valid	Johnson	Devonian	El Otfal Formation	Morocco	A member of Harpetida belonging to the family Harpetidae.
Helioharpes aougili [123]	Sp. nov	Valid	Johnson	Devonian		Morocco	A member of Harpetida belonging to the family Harpetidae.
Isoprusia? monikae [120]	Sp. nov	Valid	Alberti	Devonian	Rupbach Shale	Germany	A member of the family Odontopleuridae.
Kettneraspis freitagi [122]	Sp. nov	Valid	Van Viersen	Devonian		Morocco	A member of the family Odontopleuridae.
Kielania tumula [123]	Sp. nov	Valid	Johnson	Devonian	Ihandar Formation	Morocco	A member of Harpetida belonging to the family Harpetidae.
Kingaspidoides epimetheus [118]	Sp. nov	Valid	Geyer	Cambrian	Tannenknock Formation	Germany	A member of the family Ellipsocephalidae.
Kingaspidoides wildensteinensis [118]	Sp. nov	Valid	Geyer	Cambrian (Wuliuan)	Tannenknock Formation	Germany	A member of the family Ellipsocephalidae.
Kingaspis dolosus [118]	Sp. nov	Valid	Geyer	Cambrian (Wuliuan)	Tannenknock Formation	Germany	A member of the family Ellipsocephalidae.
Kingstonia smithfieldensis [121]	Sp. nov	Valid	Sundberg, Cothren & Dehler	Cambrian	Nounan Formation	United States ( Utah)	A member of the family Kingstoniidae.
Koneprusia dieterottoi [120]	Sp. nov	Valid	Alberti	Devonian	Rupbach Shale	Germany	A member of the family Odontopleuridae.
Latikingaspis tenuis [118]	Sp. nov	Valid	Geyer	Cambrian (Wuliuan)	Tannenknock Formation	Germany	A member of the family Ellipsocephalidae.
Linguaphillipsia buchuensis [126]	Sp. nov		Tang et al.	Carboniferous		Malaysia
Lioharpes ammari [123]	Sp. nov	Valid	Johnson	Devonian	Tazoulait Formation	Morocco	A member of Harpetida belonging to the family Harpetidae.
Lioharpes galea [123]	Sp. nov	Valid	Johnson	Devonian	Ihandar Formation	Morocco	A member of Harpetida belonging to the family Harpetidae.
Lioharpes morocconensis [123]	Sp. nov	Valid	Johnson	Devonian	Boutiskaouine Formation	Morocco	A member of Harpetida belonging to the family Harpetidae.
Lioharpes saredra [123]	Sp. nov	Valid	Johnson	Devonian	Probably Boutiskaouine Formation	Morocco	A member of Harpetida belonging to the family Harpetidae.
Lioharpes scopulum [123]	Sp. nov	Valid	Johnson	Devonian	Probably Ihandar Formation	Morocco	A member of Harpetida belonging to the family Harpetidae.
Macropyge (Promacropyge) sahensis [127]	Sp. nov	Valid	Ghobadi Pour, Popov & Kebria-ee Zadeh	Cambrian (Furongian)	Mila Formation	Iran	A member of Asaphida belonging to the family Ceratopygidae.
Maghroharpes [123]	Gen. et 9 sp. et comb. nov	Valid	Johnson	Devonian (Pragian to Emsian)	Ihandar Formation	Czech Republic France Morocco	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).
Niobella darvarensis [127]	Sp. nov	Valid	Ghobadi Pour, Popov & Kebria-ee Zadeh	Cambrian (Furongian)	Mila Formation	Iran	A member of Asaphida belonging to the family Asaphidae.
Olenellus santuccii [128]	Sp. nov	Valid	Webster in Webster & Caron	Cambrian Stage 4	Eager Formation	Canada ( British Columbia)	A member of the family Olenellidae.
Perunaspis angulatospina [120]	Sp. nov	Valid	Alberti	Devonian	Rupbach Shale	Germany	A member of the family Lichidae.
Pinnuloharpes [123]	Gen. et 8 sp. et comb. nov	Valid	Johnson	Devonian (Emsian to Eifelian)	El Otfal Formation	Morocco Germany?	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).
Prioscutarius [118]	Gen. et comb. et 2 sp. nov	Valid	Geyer	Cambrian	Jbel Wawrmast Formation	Germany Morocco	A member of the family Conocoryphidae. The type species is "Bailiella" dilatata Geyer (1998); genus also includes new species P. max and P. moritz.
Protolenus undulatus [118]	Sp. nov	Valid	Geyer	Cambrian (Wuliuan)	Tannenknock Formation	Germany	A member of the family Ellipsocephalidae.
Protopresbynileus divergens [125]	Sp. nov	Valid	Fortey, Vargas-Parra & Droser	Ordovician	Al Rose Formation	United States ( California)	A member of the family Nileidae.
Solenopleura westergaardi [118]	Nom. nov	Valid	Geyer	Cambrian	Andrarum Limestone Bed	Sweden	A member of the family Solenopleuridae; a replacement name for Solenopleura conifrons Westergård (1953).
Staurocephalus oliveae [129]	Sp. nov	Valid	Leidi et al.	Ordovician (Katian)	Sholeshook Limestone	United Kingdom	A member of the family Encrinuridae.
Stoloharpes [123]	Gen. et 4 sp. et comb. nov	Valid	Johnson	Devonian (Lochkovian to Eifelian)		Czech Republic Morocco	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).
Termierella totanesensis [116]	Sp. nov	Valid	Sepúlveda et al.	Cambrian Stage 4	Soleras Formation	Spain	A member of Redlichiida belonging to the group Ellipsocephaloidea and the family Ellipsocephalidae.
Timsaloproetus xenos [115]	Sp. nov	Valid	Van Viersen & Müller	Devonian (Emsian)		Luxembourg	A member of the family Proetidae.
Triarthrusnovoaustralis [130]	Sp. nov	Valid	Smith et al.	Ordovician (Katian)	Malachis Hill Formation	Australia	A member of Ptychopariida belonging to the family Olenidae
Ulugtella? biformis [131]	Sp. nov	Valid	Pereira, Rábano & Gutiérrez-Marco	Ordovician (Katian)		Morocco
Wanneria cranbrookense [128]	Sp. nov	Valid	Webster in Webster & Caron	Cambrian Stage 4	Eager Formation	Canada ( British Columbia)	A member of Olenelloidea belonging to the family Wanneriidae.
Waukeshaaspis [132]	Gen. et sp. nov	Valid	Randolfe & Gass	Silurian (Telychian)	Brandon Bridge Formation	United States ( Wisconsin)	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. ^[133]
• 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). ^[134]
• 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. ^[135]
• 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. ^[136]
• 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. ^[137]
• 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). ^[138]
• 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. ^[139]
• 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). ^[140]
• 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. ^[141]
• 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. ^[142]
• 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). ^[143]
• 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. ^[144]
• 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). ^[145]
• A study on the biogeography of Cheirurina during the Ordovician is published by Pérez-Peris, Adrain & Daley (2024). ^[146]
• 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 ^[147] and the American Museum of Natural History. ^[148]
• A study on the phylogenetic relationships of cheirurine, deiphonine and "cyrtometopine" cheirurids is published by Pérez-Peris, Adrain & Daley (2024). ^[149]

Other arthropods

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes	Images
Ankitokazocaris lariensis [150]	Sp. nov	Valid	Ji & Tintori	Middle Triassic (Ladinian)	Buchenstein Formation	Italy	A thylacocephalan.
Atropicaris lintveri [151]	Sp. nov	Valid	Laville et al.	Middle Triassic (Anisian)	Lower Serla Dolomite Formation	Slovenia	A thylacocephalan.
Heterochordeuma liae [152]	Sp. nov	Valid	Su, Cai & Huang	Cretaceous (Albian-Cenomanian)	Burmese amber	Myanmar	A millipede belonging to the family Heterochordeumatidae.
Kamnikaris [151]	Gen. et sp. nov	Valid	Laville et al.	Middle Triassic (Anisian)	Strelovec Formation	Slovenia	A thylacocephalan. The type species is K. cemazevkaensis.
Lomankus [153]	Gen. et sp. nov	Valid	Pary et al.	Upper Ordovician (Katian)	Beecher’s Trilobite Beds	United States ( New York)	A late surviving member of the Megacheira belonging to the family Leanchoiliidae. The type species is L. edgecombei.
Lotagnostus clarki [117]	Sp. nov	Valid	Taylor, Loch & Repetski	Cambrian (Furongian)	Windfall Formation	United States ( Nevada)	A member of Agnostida belonging to the family Agnostidae.
Lotagnostus morrisoni [117]	Sp. nov	Valid	Taylor, Loch & Repetski	Cambrian (Furongian)	Windfall Formation	United States ( Nevada)	A member of Agnostida belonging to the family Agnostidae.
Lotagnostus nolani [117]	Sp. nov	Valid	Taylor, Loch & Repetski	Cambrian (Furongian)	Windfall Formation	United States ( Nevada)	A member of Agnostida belonging to the family Agnostidae.
Lotagnostus rushtoni [117]	Sp. nov	Valid	Taylor, Loch & Repetski	Cambrian (Furongian)	Windfall Formation	United States ( Nevada)	A member of Agnostida belonging to the family Agnostidae.
Microcaris ajdovskae [151]	Sp. nov	Valid	Laville et al.	Late Triassic (Carnian)	Martuljek Limestone Formation	Slovenia	A thylacocephalan.
Neoagnostus parki [117]	Sp. nov	Valid	Taylor, Loch & Repetski	Cambrian (Furongian)	Windfall Formation	United States ( Nevada)	A member of Agnostida belonging to the family Diplagnostidae.
Paracalodiscus [154]	Gen. et comb. nov	Valid	Korovnikov & Bushuev	Cambrian	Brigus Formation	Canada Russia	A member of Agnostida belonging to the family Weymouthiidae. The type species is "Microdiscus" helena Walcott (1889); genus also includes "Calodiscus" granulosus Egorova & Shabanov (1972).
Paraostenia striata [155]	Comb. nov	Valid	(Glaessner)	Late Triassic (Carnian)	Polzberg Lagerstätte	Austria	A thylacocephalan; moved from Austriocaris striata Glaessner (1931).
Parisicaris naoyai [156]	Sp. nov	Valid	Ehiro & Kano	Early Triassic (Olenekian)	Osawa Formation	Japan	A thylacocephalan belonging to the family Microcarididae.
Pectocaris paraspatiosa [157]	Sp. nov	Valid	Jin et al.	Cambrian Stage 3	Hongjingshao Formation	China	A hymenocarine belonging to the pectocarididae family.
Siphonorhinus globosus [158]	Sp. nov	Valid	Su, Cai & Huang	Cretaceous (Albian to Cenomanian)	Burmese amber	Myanmar	A millipede belonging to the family Siphonorhinidae.
Siphonorhinus peculiaris [158]	Sp. nov	Valid	Su, Cai & Huang	Cretaceous (Albian to Cenomanian)	Burmese amber	Myanmar	A millipede belonging to the family Siphonorhinidae.
Stoppanicaris [150]	Gen. et sp. nov	Valid	Ji & Tintori	Middle Triassic (Ladinian)	Buchenstein Formation	Italy	A thylacocephalan. The type species is S. grignaensis.
Tomagnostella tullbergi [159]	Sp. nov	Valid	Weidner, Nielsen & Ebbestad	Cambrian (Guzhangian)		Norway Sweden	A member of Agnostida.
Youti [160]	Gen. et sp. nov	Valid	Smith et al.	Cambrian Stage 3	Yu'anshan Formation	China	A member of the lower stem group of Euarthropoda. The type species is Y. yuanshi.

• A study on the morphological diversity of carapaces of bradoriids is published by Cox & Pates (2024). ^[161]
• O'Flynn et al. (2024) describe new fossil material of Bushizheia yangi from the Cambrian Chengjiang Lagerstätte (China), providing new information on its head morphology, and interpret the studied specimens as supporting the interpretation of a six-segmented head as an ancestral state for Deuteropoda. ^[162]
• Redescription and a study on the affinities of Urokodia aequalis is published by Liu et al. (2024), who interpret this arthropod as a basal member of Artiopoda, and interpret its body plan as likely similar to the ancestral body plan for Artiopoda. ^[163]
• Lin et al. (2024) describe new fossil material of Retifacies abnormalis from the Cambrian Helinpu Formation (Yunnan, China) including large specimens with a carapace ornamentation different from what was previously known, and interpret the reported differences as developing during ontogeny, but don't consider them to indicate sexual dimorphs. ^[164]
• Li et al. (2024) report evidence of repeated decline of morphological diversity of eodiscids and agnostoids associated with Cambrian extinction events and with the Great Ordovician Biodiversification Event. ^[165]
• Izquierdo-López & Caron (2024) describe new fossil material of Odaraia alata from the Burgess Shale (Canada), including well-preserved mandibles that can be homologized with those of Cambrian fuxianhuiids and extant mandibulates. ^[166]
• Braddy (2024) reviews diversity, ichnology, ecology and evolution of euthycarcinoids, and names a new family Apankuridae. ^[167]
• A study on the anatomy of heads of juvenile specimens of Arthropleura from the Carboniferous Montceau-les-Mines Lagerstätte (France) is published by Lhéritier et al. (2024), who report evidence of the presence of millipede-like trunk tagmosis and centipede-like head characters in Arthropleura, and argue that Arthropleura might be a member of Pectinopoda more closely related to millipedes than to centipedes. ^[168]
• Le Cadre et al. (2024) describe new centipede specimens from the Cretaceous amber from Myanmar, including a henicopid representing the oldest unambiguous member of [[]] in the fossil record reported to date. ^[169]
• Review of the fossil record of millipedes is published by Álvarez-Rodríguez et al. (2024). ^[170]

General research

• Turner, McLoughlin & Mays (2024) review the known record of plant–arthropod interactions on Early and Middle Triassic fossil leaves from Gondwana, reevaluate known record of the studied interactions in the Australian Middle Triassic Benolong Flora, and argue that concerted investigations can greatly increase the number of plant–arthropod interactions in the studied fossil assemblages. ^[171]
• Loewen et al. (2024) describe a diverse amber deposit from the Maastrichtian strata from the Big Muddy Badlands (Canada), preserving fossils of representatives of seven arthropod orders and at least 11 insect families, and interpret the studied assemblage as providing evidence of a faunal turnover among insects prior to the Cretaceous–Paleogene extinction event. ^[172]

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