# 2025 in arthropod paleontology

"none" is preferred when the title is sufficiently descriptive; see [[WP:SDNONE]] 2025 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 2025.

## Chelicerates
### Arachnids
#### Amblypygi

| Name | Novelty | Status | Authors | Age | Type locality | Location | Notes | Image |
| Phrynus luisdearmasi | Sp. nov | Valid | Dunlop & Bartel | Miocene (probably Burdigalian) | Dominican amber | Dominican Republic | A species of Phrynus. | |
| Phrynus poinari | Nom. nov | Valid | Dunlop & Bartel | Miocene | Mexican amber | Mexico | A species of Phrynus; a replacement name for Phrynus mexicana Poinar & Brown (2004). | |

#### Pseudoscorpiones

| Name | Novelty | Status | Authors | Age | Type locality | Location | Notes | Image |
| Lechytia finniae | Sp. nov | | Hagen et al. | Late Cretaceous (Cenomanian) | Kachin amber | Myanmar | A species of Lechytia. | |

#### Sarcoptiformes

| Name | Novelty | Status | Authors | Age | Type locality | Location | Notes |
| Paralycus ekaterinae | Sp. nov | Valid | Kolesnikov et al. | Eocene (Priabonian) | Rovno amber | Ukraine | A member of Oribatida belonging to the family Pediculochelidae. |
| Paralycus primus | Sp. nov | Valid | Kolesnikov et al. | Late Cretaceous (Cenomanian) | Kachin amber | Myanmar | A member of Oribatida belonging to the family Pediculochelidae. |
| Plesioglyphus | Gen. et sp. nov | Valid | Sendi et al. | Early Cretaceous (Barremian) | Lebanese amber | Lebanon | A member of the family Schizoglyphidae. The type species is P. lebanotermi. |

#### Scorpiones

| Name | Novelty | Status | Authors | Age | Type locality | Location | Notes |
| Archaeoananteroides carusoi | Sp. nov | Valid | Lourenço in Lourenço & Velten | Cretaceous | Kachin amber | Myanmar | A scorpion belonging to the superfamily Buthoidea and the family Ananteridae. |
| Cretaceoushormiops petersi | Sp. nov | Valid | Lourenço in Lourenço & Velten | Cretaceous | Kachin amber | Myanmar | A scorpion belonging to the family Protoischnuridae. |
| Jeholia | Gen. et sp. nov | Valid | Xuan et al. | Early Cretaceous | Yixian Formation | China | A member of Buthida of uncertain affinities. The type species is J. longchengi. |
| Serratochaerilobuthus barbarae | Sp. nov | Valid | Lourenço & Velten | Cretaceous | Kachin amber | Myanmar | |

##### Scorpion research

* Xuan et al. (2025) revise scorpions from the family Chaerilobuthidae known from the Cretaceous Kachin amber from Myanmar, reinterpret Chaeriloiurus and Serratochaerilobuthus as junior synonyms of the genus Chaerilobuthus, and rerank the family Chaerilobuthidae itself as a subfamily belonging to the family Pseudochactidae.

## Crustaceans
### Malacostracans

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes |
| Karumballichirus khadroensis | Comb. nov | Valid | (Hyžný & Charbonnier in Hyžný et al.) | Paleocene (Danian) | Khadro Formation | Pakistan | A member of Axiidea belonging to the family Callichiridae; moved from Neocallichirus khadroensis Hyžný & Charbonnier in Hyžný et al. (2016). |
| Karumballichirus lakhraensis | Comb. nov | Valid | (Hyžný & Charbonnier in Hyžný et al.) | Paleocene (Thanetian)?–Eocene (Ypresian) | Lakhra Formation | Pakistan | A member of Axiidea belonging to the family Callichiridae; moved from Neocallichirus lakhraensis Hyžný & Charbonnier in Hyžný et al. (2016). |
| Karumballichirus maximus | Comb. nov | Valid | (Milne-Edwards) | Holocene | | Thailand | A member of Axiidea belonging to the family Callichiridae; moved from Callianassa maxima Milne-Edwards (1870). |
| Mioapseudes | Gen. et sp. nov | Valid | Wallaard | Miocene | | Cyprus | A tanaidacean. The type species is M. mediterraneus. |
| Pelorophontes | Gen. et sp. nov | | Schweitzer & Schram | Carboniferous (Moscovian) | | United States ( Oklahoma) | A member of the family Gorgonophontidae. The type species is P. mayi. |
| Synoriacarcinus | Gen. et comb. nov | Valid | Schweitzer, Feldmann & Findling | Late Cretaceous (Turonian to Campanian) | Merchantville Formation | United States ( Delaware) | A crab belonging to the family Ibericancridae. The type species is "Diaulax" millerae Bishop (1992); genus also includes "Seorsus" kauffmani Feldmann et al. (2013) from the Mancos Shale (New Mexico, United States). |

#### Malacostracan research

* Bicknell et al. (2025) study two clusters of Archaeoniscus brodiei from the Berriasian Durlston Formation (United Kingdom), providing new information on the anatomy of the studied isopod.
* Mychko (2025) describes fossil material of Palaeastacus aff. solitarius from the Tithonian strata from the Cheryomukha River Basin (Yaroslavl Oblast, Russia), extending known geographical range of Late Jurassic members of the genus Palaeastacus.
* Baucon et al. (2025) report the discovery of vertical burrows from a new Carnian site from the Travenanzes Formation (Italy), possibly representing the oldest fossil evidence of true crabs reported to date.

### Ostracods

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes |
| Aurila costabausaensis | Sp. nov | | Sciuto, Baldanza & Reitano | Pliocene | | Italy | |
| Aurila daphnidis | Sp. nov | | Sciuto, Baldanza & Reitano | Pliocene | | Italy | |
| Aurila mazzarinoensis | Sp. nov | | Sciuto, Baldanza & Reitano | Pliocene | | Italy | |
| Aurila sanctiandreae | Sp. nov | | Sciuto, Baldanza & Reitano | Pliocene | | Italy | |
| Bizonidea | Gen. et comb. nov | Valid | Franz, Tesakova & Schweigert | Jurassic | | France  Germany | Genus includes "Progonocythere" gublerae Bizon (1958). |
| Cytheretta buccheriensis | Sp. nov | | Sciuto, Baldanza & Reitano | Pliocene | | Italy | |
| Glyptocythere pseudotuberosa | Nom. nov | Valid | Tesakova | Middle Jurassic (Bathonian) | | Germany | A replacement name for Glyptocythere tuberosa Brand & Malz (1962). |
| Lophocythere? jhuranensis | Sp. nov | Valid | Kumari & Mahalakshmi in Mahalakshmi, Kumari & Muduli | Late Jurassic (Kimmeridgian) | Jhuran Formation | India | Published online in 2025, but the issue date is listed as December 2024. |
| Macrodentina jaduraensis | Sp. nov | Valid | Kumari & Mahalakshmi in Mahalakshmi, Kumari & Muduli | Late Jurassic (Kimmeridgian) | Jhuran Formation | India | Published online in 2025, but the issue date is listed as December 2024. |
| Patellacythere lineata | Sp. nov | Valid | Kumari & Mahalakshmi in Mahalakshmi, Kumari & Muduli | Late Jurassic (Kimmeridgian) | Jhuran Formation | India | Published online in 2025, but the issue date is listed as December 2024. |
| Pattersoncypris labiata | Sp. nov | | Maia et al. | Cretaceous | | | A member of the family Cyprididae. |
| Perissocytheridea (Kroemmelbeinella) hiblaea | Sp. nov | | Sciuto, Baldanza & Reitano | Pliocene | | Italy | |
| Tenedocythere forticostata | Sp. nov | | Sciuto, Baldanza & Reitano | Pliocene | | Italy | |
| Verrucocythereis verrucomurata | Sp. nov | | Sciuto, Baldanza & Reitano | Pliocene | | Italy | |

#### Ostracod research

* Evidence from the study of Silurian ostracod assemblages from the eastern Baltic Basin (Lithuania), indicating that the mid-Homerian biotic turnover event most likely lasted approximately 260,000 years (and thus was shorter than indicated by earlier estimates), is presented by Rinkevičiūtė et al. (2025).
* Wang et al. (2025) revise the ostracod fauna from the Upper Cretaceous Liwaxia and Madongshan formations (China), correlate it with contemporaneous ostracod faunas from China and Mongolia, and assign the genus Liupanshania to the subfamily Cyproidinae in the family Notodromadidae.
* A study on the composition and biogeographical connections of ostracod assemblages from the Paleocene-Eocene sedimentary succession at Wadi Tarfa (Egypt) is published by Samir et al. (2025).

### Thecostracans

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes | Images |
| Proverruca ornata | Sp. nov | Valid | Gale & Jagt | Late Cretaceous (Campanian) | Gulpen Formation | Belgium | A barnacle. | |

#### Thecostracan research

* Gale & Sadorf (2025) report the discovery of fossil material of Verruca stroemia from the Pliocene strata of the Yorktown Formation (North Carolina, United States), and interpret purported extinct species V. alaskana and V. koikei as junior synonyms of V. stroemia.

### Other crustaceans
#### Other crustacean research

* Bicknell et al. (2025) describe an assemblage of 50 specimens of Schramine montanaensis from the Carboniferous Bear Gulch Limestone (Montana, United States), representing one of oldest records of gregarious behavior of crustaceans reported to date.

## Trilobites

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes |
| Batocara tuberosus | Sp. nov | Valid | Wei et al. | Ordovician-Silurian transition | | China | |
| Ciliscutellum rhaxerosides | Sp. nov | Valid | Wei et al. | Ordovician-Silurian transition | | China | |
| Cyrtosymboloides koenigshofi | Sp. nov | Valid | Flick | Devonian | Hermershausen Limestone | Germany | |
| Ibexocephala | Gen. et 2 sp. nov | Valid | Adrain | Ordovician (Tremadocian) | Garden City Formation | United States ( Idaho) | A member of the family Bathyuridae. The type species is I. lossoae; genus also includes I. dekosterae from the Fillmore Formation (Utah, United States). |
| Kettneraspis dickinsoni | Sp. nov | Valid | Van Viersen, Lerouge & Kesselaer | Devonian (Pragian) | Ihandar Formation | Morocco | A member of the family Odontopleuridae. |
| Leonaspis burketti | Sp. nov | Valid | Van Viersen, Lerouge & Kesselaer | Devonian (Pragian) | Ihandar Formation | Morocco | A member of the family Odontopleuridae. |
| Leonaspis chancellori | Sp. nov | Valid | Van Viersen, Lerouge & Kesselaer | Devonian (Pragian) | Ihandar Formation | Morocco | A member of the family Odontopleuridae. |
| Licnocephala bradleyi | Sp. nov | Valid | Adrain | Ordovician (Tremadocian) | Garden City Formation | United States ( Idaho) | A member of the family Bathyuridae. |
| Licnocephala ngi | Sp. nov | Valid | Adrain | Ordovician (Tremadocian) | Garden City Formation | United States ( Idaho) | A member of the family Bathyuridae. |
| Meadowtownella yunnanensis | Sp. nov | Valid | Wei et al. | Ordovician-Silurian transition | | China | |
| Onchonotellus arealis | Sp. nov | Valid | Makarova et al. | Cambrian | | Russia | |
| Parasolenopleura siberica | Sp. nov | Valid | Makarova et al. | Cambrian | | Russia | |
| Piriproetus ornatissimus nictans | Ssp. nov | Valid | Flick | Devonian | Hermershausen Limestone | Germany | |
| Pseudanomocarina falcata | Sp. nov | Valid | Makarova et al. | Cambrian | | Russia | |
| Sinoencrinurus | Gen. et comb. nov | Valid | Wei et al. | Ordovician-Silurian transition | Lianfeng Formation | China | The type species is "Encrinuroides" zhenxiongensis Sheng (1964); genus also includes "Niuchangella" meitanensis Zhang (1974), "Encrinuroides" yanheensis Yin in Yin & Lee (1978), "Encrinuroides" yichangensis Yi (1978) and "Encrinuroides" yinjiangensis Zhang (1974). |
| Toxotiformis tchopkiensis | Sp. nov | Valid | Makarova et al. | Cambrian | | Russia | |
| Yunnanoproetus | Gen. et sp. nov | Valid | Wei et al. | Ordovician-Silurian transition | | China | The type species is Y. shanshuensis. |

### Trilobite research

* Crônier, Couette & Laffont (2025) compare the utility of 2D and 3D quantitative analyses for the studies of morphological diversity of phacopid trilobites.

## Other arthropods

| Name | Novelty | Status | Authors | Age | Type locality | Country | Notes |
| Ammagnostus minutus | Sp. nov | Valid | Makarova et al. | Cambrian | | Russia | A member of Agnostida. |
| Dabashanella? lunaiformis | Sp. nov | Valid | Peel | Cambrian (Wuliuan) | Henson Gletscher Formation | Greenland | A member of Phosphatocopida belonging to the family Dabashanellidae. |
| Liangshanella? qassutit | Sp. nov | Valid | Peel | Cambrian (Wuliuan) | Henson Gletscher Formation | Greenland | A member of Bradoriida belonging to the family Svealutidae. |
| Tardisia | Gen. et sp. nov | Valid | McCoy et al. | Upper Carboniferous (Moscovian) | Mazon Creek fossil beds | United States ( Illinois) | A probable late surviving member of the Vicissicaudata within Artiopoda. The type species is T. broedeae |
| Toledodiscus | Gen. et sp. nov | | Collantes & Pereira | Cambrian Stage 4 | Soleras Formation | Spain | A member of Agnostida belonging to the family Weymouthiidae. The type species is T. valverdi. |
* Evidence of the presence of two pairs of different compound eyes in Pygmaclypeatus daziensis (a pair of stalked, movable eyes and a pair of sessile dorsal eyes) is presented by Schmidt et al. (2025).
* O'Flynn et al. (2025) describe new fossil material of Kuamaia lata from the Cambrian Chiungchussu Formation (China), providing new information on the frontal appendages and number of head segments in members of this species, and interpret the studied fossils as indicating that raptorial frontal appendages, ancestral for Euarthropoda but lost in Artiopoda, evolved secondarily within the artiopod lineage that included K. lata.