# 2024 in arthropod paleontology

"none" is preferred when the title is sufficiently descriptive; see [[WP:SDNONE]] 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 |
| Acanthomacrothele | 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 | Sp. nov | Valid | Wunderlich | Eocene | Baltic amber | Europe (Baltic Sea region) | A possible long-jawed orb weaver. |
| ?Bararaneus rotundus | 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. |
| Breviscauda | Gen. et sp. nov | Valid | Wunderlich | Cretaceous | Burmese amber | Myanmar | A tree trunk spider. The type species is B. translucens. |
| Lineaburmops longiantepes | Sp. nov | | Guo, Selden & Ren in Guo et al. | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A spider belonging to the family Lagonomegopidae. |
| Lineaburmops rhombus | Sp. nov | | Guo et al. | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A spider belonging to the family Lagonomegopidae. |
| Longissipalpus albistriatus | Sp. nov | Valid | Hou et al. | Cretaceous | Burmese amber | Myanmar | A spider belonging to the family Pholcochyroceridae. |
| Mengesilia | Gen. et sp. nov | Valid | Wunderlich | Eocene | Rovno amber | Ukraine | A tree trunk spider. The type species is M. rovnoensis. |
| Myrmarachne colombiana | 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. |
| Parvosegestria elegans | Sp. nov | Valid | Wunderlich | Cretaceous | Burmese amber | Myanmar | A possible tube-dwelling spider. |
| Pedipalparaneus protumidus | Sp. nov | Valid | Hou et al. | Cretaceous | Burmese amber | Myanmar | A spider belonging to the family Pholcochyroceridae. |
| Pholcophora gregorioi | 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.

#### Ixodida

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes |
| Deinocroton bicornis | 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 | Sp. nov | Valid | Chitimia-Dobler, Dunlop & Mans in Chitimia-Dobler et al. | Cretaceous | Burmese amber | Myanmar | A tick belonging to the family Nuttalliellidae. |
| Legionaris | 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 | Sp. nov | Valid | Chitimia-Dobler, Dunlop & Mans in Chitimia-Dobler et al. | Cretaceous | Burmese amber | Myanmar | A species of Nuttalliella. |
| Nuttalliella odyssea | Sp. nov | Valid | Chitimia-Dobler, Dunlop & Mans in Chitimia-Dobler et al. | Cretaceous | Burmese amber | Myanmar | A species of Nuttalliella. |
| Nuttalliella placaventrala | Sp. nov | Valid | Chitimia-Dobler, Dunlop & Mans in Chitimia-Dobler et al. | Cretaceous | Burmese amber | Myanmar | A species of Nuttalliella. |
| Nuttalliella tropicasylvae | Sp. nov | Valid | Chitimia-Dobler, Dunlop & Mans in Chitimia-Dobler et al. | Cretaceous | Burmese amber | Myanmar | A species of Nuttalliella. |
| Nuttalliella tuberculata | 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 | Sp. nov | Valid | Bartel, Dunlop & Wedmann | Eocene | Messel pit | Germany | Possibly a species of Leiobunum. | |
| ?Leiobunum schaali | 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.

#### Pseudoscorpiones

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes |
| Cretogarypinus | 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 | 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 | Sp. nov | Valid | Röschmann et al. | Late Cretaceous (Cenomanian) | Burmese amber | Myanmar | A member of the family Hyidae. |
| Hysterochelifer manpauch | Sp. nov | | Córdova-Tabares et al. | Miocene | Mexican amber | Mexico | A member of the family Cheliferidae. |
| Ithioreolpium | 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 |
| Collohmannia albertii | Sp. nov | Valid | Kolesnikov, Vorontsov & Sidorchuk | Eocene | Baltic amber | Europe (Baltic Sea region) | A member of Oribatida belonging to the family Collohmanniidae. |
| Collohmannia clavata | Sp. nov | Valid | Kolesnikov, Vorontsov & Sidorchuk | Eocene | Baltic amber | Europe (Baltic Sea region) | A member of Oribatida belonging to the family Collohmanniidae. |
| Collohmannia groehni | Sp. nov | Valid | Kolesnikov, Vorontsov & Sidorchuk | Eocene | Baltic amber | Europe (Baltic Sea region) | A member of Oribatida belonging to the family Collohmanniidae. |
| Collohmannia kerneggeri | Sp. nov | Valid | Kolesnikov, Vorontsov & Sidorchuk | Eocene | Baltic amber | Europe (Baltic Sea region) | A member of Oribatida belonging to the family Collohmanniidae. |
| Collohmannia nortoni | Sp. nov | Valid | Kolesnikov, Vorontsov & Sidorchuk | Eocene | Baltic amber | Europe (Baltic Sea region) | A member of Oribatida belonging to the family Collohmanniidae. |
| Collohmannia sellnicki | Sp. nov | Valid | Kolesnikov, Vorontsov & Sidorchuk | Eocene | Baltic amber | Europe (Baltic Sea region) | A member of Oribatida belonging to the family Collohmanniidae. |
| Collohmannia weiterschani | 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).

#### Scorpiones

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes |
| Betaburmesebuthus thomasvelteni | Sp. nov | Valid | Lourenço in Lourenço & Velten | Cretaceous | Burmese amber | Myanmar | A member of Buthoidea belonging to the family Palaeoburmesebuthidae |
| Burmesescorpiops velteni | Sp. nov | Valid | Lourenço | Cretaceous | Burmese amber | Myanmar | A member of the family Palaeoeuscorpiidae. |
| Chaerilobuthus petersi | Sp. nov | Valid | Lourenço in Lourenço & Velten | Cretaceous | Burmese amber | Myanmar | A member of the family Chaerilobuthidae or Pseudochactidae. |
| Chaerilobuthus staxi | Sp. nov | Valid | Lourenço in Lourenço & Velten | Cretaceous | Burmese amber | Myanmar | A member of the family Chaerilobuthidae or Pseudochactidae. |
| Paranotaburmesebuthus | 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 | Gen. et sp. nov | Disputed | Lourenço in Lourenço & Velten | Cretaceous | Burmese amber | Myanmar | A member of the family Chaerilobuthidae or Pseudochactidae. 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. |

##### Scorpion research

* Review of the higher classification of fossil scorpions is published by Dunlop & Garwood (2024) .
* 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.

#### Solifugae

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
| Mesoproctus rayoli | Sp. nov | Valid | Santana et al. | Early Cretaceous (Aptian—Albian) | Crato Formation | Brazil | A whip scorpion belonging to the family Thelyphonidae. | |

#### Trombidiformes

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes |
| Pararesinacarus krczali | Sp. nov | Valid | Khaustov et al. | Eocene | Rovno amber | Ukraine | A mite belonging to the family Resinacaridae. |
| Resinacarus longipilis | Sp. nov | Valid | Khaustov et al. | Eocene | Rovno amber | Ukraine | A mite belonging to the family Resinacaridae. |
| Resinacarus striatus | Sp. nov | Valid | Khaustov et al. | Eocene | Rovno amber | Ukraine | A mite belonging to the family Resinacaridae. |
| Resinacarus vitzthumi | Sp. nov | Valid | Khaustov et al. | Eocene | Rovno amber | Ukraine | A mite belonging to the family Resinacaridae. |
| Rhombometridium | 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.

#### Other arachnids

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
| Douglassarachne | 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).
* A study on the structure of cuticles of Palaeocharinus, providing evidence of possible adaptations to terrestrial life, is published by Long et al. (2024).

### Eurypterids

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
| Qujingopterus | 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.
* 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.
* 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).
* 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.
* 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.
* 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.
* Description of genital appendages of Acutiramus macrophthalmus is published by Cheng & Briggs (2024).

### 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).

### Other chelicerates

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
| Titanoprosoma | 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 | 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.
* Revision of the taxonomy, morphology and stratigraphical distribution of members of the genus Limuloides is published by Howard (2024).
* 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.

## Crustaceans
### Malacostracans

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes |
| Aguadites | 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 | 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 | Sp. nov | Valid | Nyborg et al. | Late Cretaceous (Campanian) | Northumberland Formation | Canada ( British Columbia) | A raninoid crab. |
| Calverteca | 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 | Sp. nov | Valid | Garassino & Pasini in Girone et al. | Pleistocene | | Italy | A crab belonging to the family Goneplacidae. |
| Cretagourretia | 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 | 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 | Comb. nov | Valid | (Milne-Edwards) | Oligocene (Chattian) | | France | A shrimp belonging to the family Atyidae; moved from Caridina nitida Milne-Edwards (1879). |
| Eoactinotocarcinus | 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 | 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 | Sp. nov | Valid | De Angeli & Lovato | Eocene | | Italy | A crab belonging to the group Portunoidea. |
| Halicarcinus popeius | Sp. nov | Valid | Gašparič et al. | Oligocene (Chattian) | Trbovlje Formation | Slovenia | A crab belonging to the family Hymenosomatidae. |
| Icriocarcinus aldersonorum | Sp. nov | Valid | Nyborg & Garassino | Late Cretaceous (Campanian) | Tuna Canyon Formation | United States ( California) | A crab belonging to the family Lithophylacidae. |
| Ixoides miocenicus | 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 | 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 | Sp. nov | Valid | Gašparič et al. | Oligocene (Chattian) | Trbovlje Formation | Slovenia | A crab belonging to the family Hymenosomatidae. |
| Makrokylindrus itoi | Sp. nov | Valid | Luque & Gerken | Plio-Pleistocene | Hijikata Formation | Japan | A member of the family Diastylidae. |
| Minohellenus grolaensis | Sp. nov | Valid | De Angeli & Lovato | Eocene | | Italy | A crab belonging to the group Portunoidea. |
| Necrocarcinus sibiricus | Sp. nov | | Kočová Veselská et al. | Late Cretaceous | | Russia ( Krasnoyarsk Krai) | A crab belonging to the family Necrocarcinidae. |
| Neogoneplax bradanica | Sp. nov | Valid | Garassino & Pasini in Girone et al. | Pleistocene | | Italy | A crab belonging to the family Goneplacidae. |
| Palaeobresilia | 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 | 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 | 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 | 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. |
| Portunus bericensis | Sp. nov | Valid | De Angeli & Bellin | Eocene | | Italy | A species of Portunus. |
| Portunus planargiaensis | Sp. nov | Valid | Pasini & Garassino | Miocene | | Italy | A species of Portunus. |
| Pseudocarcinus karlraubenheimeri | Sp. nov | Valid | Van Bakel & Ossó | Miocene (Tongaporutuan) | Urenui Formation | New Zealand | A relative of the Tasmanian giant crab. |
| Pyrenicola | 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 | Sp. nov | | Vega, Garassino, Nyborg & Pasini in Vega et al. | Late Cretaceous | | Cuba | A raninoid crab. |
| Rhinopterocaris fordycei | Sp. nov | Valid | Liu et al. | Ordovician | Preservation Formation | New Zealand | A member of Phyllocarida belonging to the family Caryocarididae. |
| Rodanina | 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 | Comb. nov | | (Peach) | Carboniferous (Tournaisian) | Ballagan Formation | United Kingdom | A member of the family Tealliocarididae. Moved from Tealliocaris robusta Peach (1908). |
| Silvacarcinus cisuralicus | Sp. nov | Valid | Mychko, Schweitzer & Feldmann | Late Cretaceous (Campanian) | | Russia ( Orenburg Oblast) | A crab belonging to the family Orithopsidae. |
| Solteria | Gen. et sp. nov | Valid | Garassino et al. | Eocene | | Italy | A member of Caridea. Genus includes new species S. spinosa. |
| Tealliocaris briggsi | Sp. nov | | Clark & Ross | Carboniferous (Tournaisian) | Ballagan Formation | United Kingdom | A member of the family Tealliocarididae. |
| Tealliocaris elliotti | Sp. nov | | Clark | Carboniferous (Bashkirian) | | United Kingdom | A member of the family Tealliocarididae. |
| Tealliocaris weegie | Sp. nov | | Clark & Ross | Carboniferous (Mississippian) | | United Kingdom | A member of the family Tealliocarididae. |
| Trentastacus | Gen. et sp. nov | Valid | Garassino et al. | Eocene | | Italy | A member of Astacida. Genus includes new species T. levis. |
| Tumulosternum ortegai | Sp. nov | Valid | Ferratges | Eocene | Roda Formation | Spain | A crab belonging to the family Majidae. |
| Uncina ultima | Sp. nov | Valid | Charbonnier et al. | Late Jurassic (Tithonian) | | Germany | An uncinid lobster. |
| Venzia | Gen. et sp. nov | Valid | Garassino et al. | Eocene | | Italy | A member of Caridea. Genus includes new species V. ypresiana. |
| Vincentdromia | 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 | 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).
* 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).
* 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.
* Redescription of Kellnerius jamacaruensis is published by Barros, Oliveira & Saraiva (2024), who reaffirm the inclusion of this shrimp within the family Palaemonidae.
* 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).
* 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).
* 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.
* 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.
* A study on the diversity and distribution of crabs belonging to the group Homoloida throughout their evolutionary history is published by Shaffer & Schweitzer (2024).

### Ostracods

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes |
| Adeditia tkachovae | Sp. nov | | Sobolev | Devonian-Carboniferous transition | | Russia | A member of the family Editiidae. |
| Aleisocythereis? picnus | Sp. nov | | Ceolin et al. | Cretaceous–Palaeogene transition | | Argentina | |
| Ampuloides thungsamedensis | Sp. nov | | Promduang & Chitnarin | Late Silurian -Early Devonian | Kuan Tung Formation | Thailand | A member of Podocopida belonging to the family Pachydomellidae. |
| Aurila hokkaidoensis | Sp. nov | | Mukai & Tanaka | Miocene | Kaigarabashi Formation | Japan | |
| Batecypris | Gen. et sp. nov | Valid | Almeida-Lima et al. | Early Cretaceous (Aptian) | Crato Formation | Brazil | Genus includes new species B. reticularis. |
| Bathoniella | 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 | 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 | Sp. nov | | Mukai & Tanaka | Miocene | Kaigarabashi Formation | Japan | |
| Cuspicypris | Nom. nov | Valid | Guillam | Early Cretaceous | Orós Formation | Brazil | A member of Cypridoidea; a replacement name for Hastacypris Filho, Fauth & Sames. |
| Cyprideis goeldiensis | Sp. nov | | Ferreira & Ramos | Neogene | Solimões Formation | Brazil | |
| Cyprideis javariensis | Sp. nov | | Ferreira & Ramos | Neogene | Solimões Formation | Brazil | |
| Cytheropterina ainsworthi | 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 | 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 | 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 | Sp. nov | | Ceolin et al. | Cretaceous–Palaeogene transition | | Argentina | |
| Hysterocythereis acuminata | Sp. nov | | Ceolin et al. | Cretaceous–Palaeogene transition | | Argentina | |
| Macunhaella | Gen. et sp. nov | Valid | Almeida-Lima et al. | Early Cretaceous (Aptian) | Crato Formation | Brazil | Genus includes new species M. posteroaltis. |
| Neonesidea chapminuta | Sp. nov | | McDonald, Weldon & Warne | Pliocene (Zanclean) | Jemmys Point Formation | Australia | A member of the family Bairdiidae. |
| Oculocytheropteron jemmyensis | Sp. nov | | McDonald, Weldon & Warne | Pliocene (Zanclean) | Jemmys Point Formation | Australia | A member of the family Cytheruridae. |
| Ophektycythere | 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 | 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 | 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 | Sp. nov | | Ceolin et al. | Cretaceous–Palaeogene transition | | Argentina | |
| Philoneptunus plutonis | Sp. nov | | McDonald, Weldon & Warne | Pliocene (Zanclean) | Jemmys Point Formation | Australia | A member of the family Trachyleberididae. |
| Procytherura praecoquum | Sp. nov | | Forel et al. | Late Jurassic (Oxfordian) | Terres Noires Formation | France | |
| Proeditia auriculata dimorpha | Ssp. nov | | Sobolev | Devonian-Carboniferous transition | | Russia | A member of the family Editiidae. |
| Rozhdestvenskayella | Nom. nov | Valid | Guillam | Devonian (Frasnian) | | Russia | A replacement name for Ornatella Rozhdestvenskaya in Chibrikova & Rozhdestvenskaya (1959). |
| Rudolfestatscaphium | 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 | Sp. nov | | McDonald, Weldon & Warne | Pliocene (Zanclean) | Jemmys Point Formation | Australia | A member of the family Candonidae. |
| Theriosynoecum favus | Sp. nov | Valid | Almeida-Lima et al. | Early Cretaceous (Aptian) | Crato Formation | Brazil | |
| Timiriasevia aratra | Sp. nov | Valid | Almeida-Lima et al. | Early Cretaceous (Aptian) | Crato Formation | Brazil | |
| Wangshangkia jiwozhaiensis | 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 | 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).
* Taxonomic revision of ostracods from the Lower Cretaceous Codó Formation (Brazil) is published by Coimbra & Petró (2024).
* 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).

### Thecostracans

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes |
| Eolepas moorei | Sp. nov | Valid | Gale | Late Triassic (Rhaetian) | Westbury Formation | United Kingdom | A barnacle belonging to the family Eolepadidae. |
| Leweslepas cultellum | Sp. nov | Valid | Gale | Late Cretaceous (Coniacian or Santonian) | | United Kingdom | A barnacle. |
| Parastramentum cenomanense | Sp. nov | Valid | Gale | Late Cretaceous (Cenomanian) | Zig Zag Chalk Formation | United Kingdom | A barnacle. |
| Zeugmatolepas gaultinum | Sp. nov | Valid | Gale | Early Cretaceous (Albian) | Gault Clay | United Kingdom | A barnacle. |

### Other crustaceans

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes |
| Cornia wasvilrensis | Sp. nov | Valid | Poschmann et al. | Devonian | Klerf Formation | Germany | A clam shrimp. |
| Eicheleaia | Gen. et sp. nov | Valid | Poschmann et al. | Devonian | Klerf Formation | Germany | A clam shrimp. The type species is E. wenndorfi. |
| Grauvogelocaris | 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 | 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 | 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 | Sp. nov | Valid | Poschmann et al. | Devonian | | Germany | A clam shrimp. |
| Punctatestheria yaojieensis | Sp. nov | Valid | Xue & Li | Middle–Late Jurassic | Yaojie Formation | China | A clam shrimp. |
| Shipingia luchangensis | Comb. nov | | (Chen) | Late Triassic (Rhaetian) | | China | A clam shrimp. Originally described as Euestheria? luchangensis Chen (1974). |
| Triglypta hebeiensis | 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).

## Radiodonts

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
| Shucaris ankylosskelos | 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 | 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 |
| Alatacastava | 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 | Sp. nov | Valid | Sepúlveda et al. | Cambrian Stage 4 | Soleras Formation | Spain | A member of Redlichiida belonging to the group Olenellina. |
| Arduennella janseni | Sp. nov | Valid | Van Viersen & Müller | Devonian (Emsian) | | Luxembourg | A member of the family Homalonotidae. |
| Bienvillia eurekensis | Sp. nov | Valid | Taylor, Loch & Repetski | Cambrian (Furongian) | Windfall Formation | United States ( Nevada) | A member of the family Olenidae. |
| Bromella utahensis | Sp. nov | Valid | Sundberg, Cothren & Dehler | Cambrian | Nounan Formation | United States ( Utah) | A member of the family Aphelaspididae. |
| Bruthansovaspis | 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). |
| Eskoharpes sicarius | Sp. nov | Valid | Johnson | Devonian | Achguig Group | Morocco | A member of Harpetida belonging to the family Harpetidae. |
| Flexicalymene trentonensis | Sp. nov | Valid | Hopkins & Martin | Ordovician | Neuville Formation | Canada ( Quebec)  United States ( New York) | |
| Fritchaspis edgecombei | Sp. nov | Valid | Johnson | Devonian | Er Remlia Formation | Morocco | A member of Harpetida belonging to the family Harpetidae. |
| Globampyx sexsegmentatus | Sp. nov | Valid | Fortey, Vargas-Parra & Droser | Ordovician | Al Rose Formation | United States ( California) | A member of the family Raphiophoridae. |
| Harpes boudibensis | Sp. nov | Valid | Johnson | Devonian | El Otfal Formation | Morocco | A member of Harpetida belonging to the family Harpetidae. |
| Harpes lahceni | Sp. nov | Valid | Johnson | Devonian | El Otfal Formation | Morocco | A member of Harpetida belonging to the family Harpetidae. |
| Harpes lentigo | Sp. nov | Valid | Johnson | Devonian | Tazoulait Formation | Morocco | A member of Harpetida belonging to the family Harpetidae. |
| Harpes oudris | Sp. nov | Valid | Johnson | Devonian | El Otfal Formation | Morocco | A member of Harpetida belonging to the family Harpetidae. |
| Harpes prescheri | Sp. nov | Valid | Johnson | Devonian | Er Remlia Formation | Morocco | A member of Harpetida belonging to the family Harpetidae. |
| Harpes sphenocephalus | Sp. nov | Valid | Johnson | Devonian | Er Remlia Formation | Morocco | A member of Harpetida belonging to the family Harpetidae. |
| Harpes supercilium | Sp. nov | Valid | Johnson | Devonian | El Otfal Formation | Morocco | A member of Harpetida belonging to the family Harpetidae. |
| Helioharpes aougili | Sp. nov | Valid | Johnson | Devonian | | Morocco | A member of Harpetida belonging to the family Harpetidae. |
| Kettneraspis freitagi | Sp. nov | Valid | Van Viersen | Devonian | | Morocco | A member of the family Odontopleuridae. |
| Kielania tumula | Sp. nov | Valid | Johnson | Devonian | Ihandar Formation | Morocco | A member of Harpetida belonging to the family Harpetidae. |
| Kingstonia smithfieldensis | Sp. nov | Valid | Sundberg, Cothren & Dehler | Cambrian | Nounan Formation | United States ( Utah) | A member of the family Kingstoniidae. |
| Linguaphillipsia buchuensis | Sp. nov | | Tang et al. | Carboniferous | | Malaysia | |
| Lioharpes ammari | Sp. nov | Valid | Johnson | Devonian | Tazoulait Formation | Morocco | A member of Harpetida belonging to the family Harpetidae. |
| Lioharpes galea | Sp. nov | Valid | Johnson | Devonian | Ihandar Formation | Morocco | A member of Harpetida belonging to the family Harpetidae. |
| Lioharpes morocconensis | Sp. nov | Valid | Johnson | Devonian | Boutiskaouine Formation | Morocco | A member of Harpetida belonging to the family Harpetidae. |
| Lioharpes saredra | Sp. nov | Valid | Johnson | Devonian | Probably Boutiskaouine Formation | Morocco | A member of Harpetida belonging to the family Harpetidae. |
| Lioharpes scopulum | Sp. nov | Valid | Johnson | Devonian | Probably Ihandar Formation | Morocco | A member of Harpetida belonging to the family Harpetidae. |
| Macropyge (Promacropyge) sahensis | Sp. nov | Valid | Ghobadi Pour, Popov & Kebria-ee Zadeh | Cambrian (Furongian) | Mila Formation | Iran | A member of Asaphida belonging to the family Ceratopygidae. |
| Maghroharpes | 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 | 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 | Sp. nov | Valid | Webster in Webster & Caron | Cambrian Stage 4 | Eager Formation | Canada ( British Columbia) | A member of the family Olenellidae. |
| Pinnuloharpes | 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). |
| Protopresbynileus divergens | Sp. nov | Valid | Fortey, Vargas-Parra & Droser | Ordovician | Al Rose Formation | United States ( California) | A member of the family Nileidae. |
| Staurocephalus oliveae | Sp. nov | Valid | Leidi et al. | Ordovician (Katian) | Sholeshook Limestone | United Kingdom | A member of the family Encrinuridae. |
| Stoloharpes | 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 | 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 | Sp. nov | Valid | Van Viersen & Müller | Devonian (Emsian) | | Luxembourg | A member of the family Proetidae. |
| Triarthrus novoaustralis | Sp. nov | Valid | Smith et al. | Ordovician (Katian) | Malachis Hill Formation | Australia | A member of Ptychopariida belonging to the family Olenidae |
| Ulugtella? biformis | Sp. nov | Valid | Pereira, Rábano & Gutiérrez-Marco | Ordovician (Katian) | | Morocco | |
| Wanneria cranbrookense | 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 | 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.
* 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).
* 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.
* 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.
* 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.
* 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).
* 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.
* 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).
* 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.
* 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.
* 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).
* 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.
* 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).
* A study on the biogeography of Cheirurina during the Ordovician is published by Pérez-Peris, Adrain & Daley (2024).
* 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 and the American Museum of Natural History.
* A study on the phylogenetic relationships of cheirurine, deiphonine and "cyrtometopine" cheirurids is published by Pérez-Peris, Adrain & Daley (2024).

## Other arthropods

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes |
| Ankitokazocaris lariensis | Sp. nov | Valid | Ji & Tintori | Middle Triassic (Ladinian) | Buchenstein Formation | Italy | A thylacocephalan. |
| Atropicaris lintveri | Sp. nov | Valid | Laville et al. | Middle Triassic (Anisian) | Lower Serla Dolomite Formation | Slovenia | A thylacocephalan. |
| Heterochordeuma liae | Sp. nov | Valid | Su, Cai & Huang | Cretaceous (Albian-Cenomanian) | Burmese amber | Myanmar | A millipede belonging to the family Heterochordeumatidae. |
| Kamnikaris | Gen. et sp. nov | Valid | Laville et al. | Middle Triassic (Anisian) | Strelovec Formation | Slovenia | A thylacocephalan. The type species is K. cemazevkaensis. |
| Lomankus | 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 | Sp. nov | Valid | Taylor, Loch & Repetski | Cambrian (Furongian) | Windfall Formation | United States ( Nevada) | A member of Agnostida belonging to the family Agnostidae. |
| Lotagnostus morrisoni | Sp. nov | Valid | Taylor, Loch & Repetski | Cambrian (Furongian) | Windfall Formation | United States ( Nevada) | A member of Agnostida belonging to the family Agnostidae. |
| Lotagnostus nolani | Sp. nov | Valid | Taylor, Loch & Repetski | Cambrian (Furongian) | Windfall Formation | United States ( Nevada) | A member of Agnostida belonging to the family Agnostidae. |
| Lotagnostus rushtoni | Sp. nov | Valid | Taylor, Loch & Repetski | Cambrian (Furongian) | Windfall Formation | United States ( Nevada) | A member of Agnostida belonging to the family Agnostidae. |
| Microcaris ajdovskae | Sp. nov | Valid | Laville et al. | Late Triassic (Carnian) | Martuljek Limestone Formation | Slovenia | A thylacocephalan. |
| Neoagnostus parki | Sp. nov | Valid | Taylor, Loch & Repetski | Cambrian (Furongian) | Windfall Formation | United States ( Nevada) | A member of Agnostida belonging to the family Diplagnostidae. |
| Paracalodiscus | 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 | Comb. nov | Valid | (Glaessner) | Late Triassic (Carnian) | Polzberg Lagerstätte | Austria | A thylacocephalan; moved from Austriocaris striata Glaessner (1931). |
| Parisicaris naoyai | Sp. nov | Valid | Ehiro & Kano | Early Triassic (Olenekian) | Osawa Formation | Japan | A thylacocephalan belonging to the family Microcarididae. |
| Pectocaris paraspatiosa | Sp. nov | Valid | Jin et al. | Cambrian Stage 3 | Hongjingshao Formation | China | A hymenocarine belonging to the pectocarididae family. |
| Siphonorhinus globosus | Sp. nov | Valid | Su, Cai & Huang | Cretaceous (Albian to Cenomanian) | Burmese amber | Myanmar | A millipede belonging to the family Siphonorhinidae. |
| Siphonorhinus peculiaris | Sp. nov | Valid | Su, Cai & Huang | Cretaceous (Albian to Cenomanian) | Burmese amber | Myanmar | A millipede belonging to the family Siphonorhinidae. |
| Stoppanicaris | Gen. et sp. nov | Valid | Ji & Tintori | Middle Triassic (Ladinian) | Buchenstein Formation | Italy | A thylacocephalan. The type species is S. grignaensis. |
| Tomagnostella tullbergi | Sp. nov | Valid | Weidner, Nielsen & Ebbestad | Cambrian (Guzhangian) | | Norway  Sweden | A member of Agnostida. |
| Youti | 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).
* 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.
* 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.
* 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.
* 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.
* 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.
* Braddy (2024) reviews diversity, ichnology, ecology and evolution of euthycarcinoids, and names a new family Apankuridae.
* 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.
* 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.
* Review of the fossil record of millipedes is published by Álvarez-Rodríguez et al. (2024).

## 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.
* 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.