2025 in arthropod paleontology

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.

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Chelicerates

Arachnids

Amblypygi

Name	Novelty	Status	Authors	Age	Type locality	Location	Notes	Image
Phrynus luisdearmasi [1]	Sp. nov	Valid	Dunlop & Bartel	Miocene (probably Burdigalian)	Dominican amber	Dominican Republic	A species of Phrynus .
Phrynus poinari [1]	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 [2]	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	Image
Histiogaster altilis [3]	Sp. nov	Valid	Kolesnikov et al.	Eocene	Rovno amber	Ukraine	A species of Histiogaster .
Paralycus ekaterinae [4]	Sp. nov	Valid	Kolesnikov et al.	Eocene (Priabonian)	Rovno amber	Ukraine	A member of Oribatida belonging to the family Pediculochelidae.
Paralycus primus [4]	Sp. nov	Valid	Kolesnikov et al.	Late Cretaceous (Cenomanian)	Kachin amber	Myanmar	A member of Oribatida belonging to the family Pediculochelidae.
Plesioglyphus [5]	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	Image
Archaeoananteroides carusoi [6]	Sp. nov	Valid	Lourenço in Lourenço & Velten	Cretaceous	Kachin amber	Myanmar	A scorpion belonging to the superfamily Buthoidea and the family Ananteridae.
Cretaceoushormiops petersi [7]	Sp. nov	Valid	Lourenço in Lourenço & Velten	Cretaceous	Kachin amber	Myanmar	A scorpion belonging to the family Protoischnuridae.
Jeholia [8]	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 [9]	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. ^[10]

Trombidiformes

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes	Images
Caeculus aeternus [11]	Sp. nov		Porta et al.	Eocene	Baltic amber	Europe (Baltic Sea region)	A member of the family Caeculidae.

Crustaceans

Malacostracans

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes	Images
Dysopodus [12]	Gen. et sp. nov	Valid	Schädel et al.	Early Cretaceous (Barremian)		Lebanon	An isopod belonging to the group Cymothoida. The type species is D. gezei.
Karumballichirus khadroensis [13]	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 [13]	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 [13]	Comb. nov	Valid	(Milne-Edwards)	Holocene		Thailand	A member of Axiidea belonging to the family Callichiridae; moved from Callianassa maxima Milne-Edwards (1870).
Mioapseudes [14]	Gen. et sp. nov	Valid	Wallaard	Miocene		Cyprus	A tanaidacean. The type species is M. mediterraneus.
Pelorophontes [15]	Gen. et sp. nov		Schweitzer & Schram	Carboniferous (Moscovian)		United States (  Oklahoma)	A member of the family Gorgonophontidae. The type species is P. mayi.
Pseudoplakolana [12]	Gen. et comb. nov	Valid	Schädel et al.	Early Cretaceous (Aptian)	Sierra Madre Formation	Mexico	An isopod belonging to the group Cymothoida. The type species is "Plakolana" chiapaneca Bruce et al. (2021).
Synoriacarcinus [16]	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. ^[17]
• New information on the morphology of Beurlenia araripensis is provided by Lima et al. (2025). ^[18]
• 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. ^[19]
• A study on the distribution and diversity of members of the family Glypheidae throughout their evolutionary history is published by Damborenea et al. (2025). ^[20]
• 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. ^[21]

Ostracods

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes	Images
Aurila costabausaensis [22]	Sp. nov		Sciuto, Baldanza & Reitano	Pliocene		Italy
Aurila daphnidis [22]	Sp. nov		Sciuto, Baldanza & Reitano	Pliocene		Italy
Aurila mazzarinoensis [22]	Sp. nov		Sciuto, Baldanza & Reitano	Pliocene		Italy
Aurila sanctiandreae [22]	Sp. nov		Sciuto, Baldanza & Reitano	Pliocene		Italy
Bizonidea [23]	Gen. et comb. nov	Valid	Franz, Tesakova & Schweigert	Jurassic		France   Germany	Genus includes "Progonocythere" gublerae Bizon (1958).
Cytheretta buccheriensis [22]	Sp. nov		Sciuto, Baldanza & Reitano	Pliocene		Italy
Glyptocythere pseudotuberosa [24]	Nom. nov	Valid	Tesakova	Middle Jurassic (Bathonian)		Germany	A replacement name for Glyptocythere tuberosa Brand & Malz (1962).
Lophocythere? jhuranensis [25]	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 [25]	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.
Neurocythere margaritae [26]	Sp. nov	Valid	Tesakova	Middle Jurassic (Callovian)		Russia
Neurocythere parva [26]	Sp. nov	Valid	Tesakova	Middle Jurassic (Callovian)		Russia
Patellacythere lineata [25]	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 [27]	Sp. nov		Maia et al.	Cretaceous			A member of the family Cyprididae.
Perissocytheridea (Kroemmelbeinella) hiblaea [22]	Sp. nov		Sciuto, Baldanza & Reitano	Pliocene		Italy
Tenedocythere forticostata [22]	Sp. nov		Sciuto, Baldanza & Reitano	Pliocene		Italy
Terquemula pseudoflexicosta [26]	Sp. nov	Valid	Tesakova	Middle Jurassic (Callovian)		Russia
Verrucocythereis verrucomurata [22]	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). ^[28]
• 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. ^[29]
• 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). ^[30]

Thecostracans

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes	Images
Proverruca ornata [31]	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. ^[32]

Other crustaceans

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes	Images
Polygrapta dazuensis [33]	Comb. nov		(Chen)	Late Triassic	Xujiahe Formation	China	A clam shrimp belonging to the family Polygraptidae; moved from Euestheria dazuensis Chen (1974)
Polygrapta yipinglangensis [33]	Comb. nov	Valid	(Chen)	Late Triassic	Ganghaizi Formation	China	A clam shrimp belonging to the family Polygraptidae; moved from Euestheria yipinglangensis Chen (1974)

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. ^[34]

Insects

Main article: 2025 in paleoentomology

Trilobites

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes	Images
Batocara tuberosus [35]	Sp. nov	Valid	Wei et al.	Ordovician-Silurian transition		China
Ciliscutellum rhaxerosides [35]	Sp. nov	Valid	Wei et al.	Ordovician-Silurian transition		China
Cyrtosymboloides koenigshofi [36]	Sp. nov	Valid	Flick	Devonian	Hermershausen Limestone	Germany
Ibexocephala [37]	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 [38]	Sp. nov	Valid	Van Viersen, Lerouge & Kesselaer	Devonian (Pragian)	Ihandar Formation	Morocco	A member of the family Odontopleuridae.
Leonaspis burketti [38]	Sp. nov	Valid	Van Viersen, Lerouge & Kesselaer	Devonian (Pragian)	Ihandar Formation	Morocco	A member of the family Odontopleuridae.
Leonaspis chancellori [38]	Sp. nov	Valid	Van Viersen, Lerouge & Kesselaer	Devonian (Pragian)	Ihandar Formation	Morocco	A member of the family Odontopleuridae.
Licnocephala bradleyi [37]	Sp. nov	Valid	Adrain	Ordovician (Tremadocian)	Garden City Formation	United States (  Idaho)	A member of the family Bathyuridae.
Licnocephala ngi [37]	Sp. nov	Valid	Adrain	Ordovician (Tremadocian)	Garden City Formation	United States (  Idaho)	A member of the family Bathyuridae.
Meadowtownella yunnanensis [35]	Sp. nov	Valid	Wei et al.	Ordovician-Silurian transition		China
Onchonotellus arealis [39]	Sp. nov	Valid	Makarova et al.	Cambrian		Russia
Parasolenopleura siberica [39]	Sp. nov	Valid	Makarova et al.	Cambrian		Russia
Piriproetus ornatissimus nictans [36]	Ssp. nov	Valid	Flick	Devonian	Hermershausen Limestone	Germany
Politicurus edwardsi [40]	Sp. nov	Valid	Ng, Bradley & Adrain in Adrain et al.	Ordovician (Tremadocian)	House Limestone	United States (  Utah)	A member of the family Hystricuridae.
Praepatokephalus housensis [40]	Sp. nov	Valid	Adrain & Pérez-Peris in Adrain et al.	Ordovician (Tremadocian)	House Limestone	United States (  Utah)	A member of the family Remopleurididae.
Pseudanomocarina falcata [39]	Sp. nov	Valid	Makarova et al.	Cambrian		Russia
Sinoencrinurus [35]	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).
Skullrockicurus [40]	Gen. et sp. nov	Valid	Losso & Adrain in Adrain et al.	Ordovician (Tremadocian)	House Limestone	United States (  Utah)	A member of the family Dimeropygidae. The type species is S. plummeri.
Toxotiformis tchopkiensis [39]	Sp. nov	Valid	Makarova et al.	Cambrian		Russia
Yunnanoproetus [35]	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. ^[41]

Other arthropods

Name	Novelty	Status	Authors	Age	Type locality	Country	Notes	Images
Ammagnostus minutus [39]	Sp. nov	Valid	Makarova et al.	Cambrian		Russia	A member of Agnostida.
Dabashanella? lunaiformis [42]	Sp. nov	Valid	Peel	Cambrian (Wuliuan)	Henson Gletscher Formation	Greenland	A member of Phosphatocopida belonging to the family Dabashanellidae.
Keurbos [43]	Gen. et sp. nov	Valid	Gabbott et al.	Ordovician (Hirnantian)	Soom Shale (Cedarberg Formation)	South Africa	An enigmatic euarthropod, the type species is K. susanae.
Laeviglyphiulus [44]	Gen. et sp. nov	Valid	Wesener & Rühr	Cretaceous	Kachin amber	Myanmar	A millipede belonging to the family Cambalopsidae. The type species is L. patrickmuelleri.
Liangshanella? qassutit [42]	Sp. nov	Valid	Peel	Cambrian (Wuliuan)	Henson Gletscher Formation	Greenland	A member of Bradoriida belonging to the family Svealutidae.
Protosiphonorhinus [45]	Gen. et sp. nov	Valid	Moritz, Wipfler & Wesener	Cretaceous (Albian-Cenomanian)	Kachin amber	Myanmar	A millipede belonging to the family Siphonorhinidae. The type species is P. patrickmuelleri.
Tardisia [46]	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 [47]	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). ^[48]
• 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. ^[49]
• Redescription and a study on the affinities of Helmetia expansa is published by Losso, Caron & Ortega-Hernández (2025). ^[50]

General research

• Naimark & Sizov (2025) study the taphonomy of the Cambrian arthropod fossils from the Kimiltei site (Irkutsk Oblast, Russia) first reported by Naimark, Sizov & Khubanov (2023), ^[51] and argue that the identification of putative members of Offacolidae and Chasmataspidida from this locality as chelicerates is correct. ^[52]

References

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2. Hagen, M.; Kotthoff, U.; Harms, D.; Loria, S. F. (2025). "New species of Lechytia Balzan, 1892 (Arachnida: Pseudoscorpiones) from Burmese amber highlights 99 million years of morphological stasis". Cretaceous Research. 106120. doi:10.1016/j.cretres.2025.106120.
3. Kolesnikov, V. B.; Vorontsov, D. D.; Perkovsky, E. E.; Klimov, P. B. (2025). "An exceptionally well-preserved Eocene fossil mite, Histiogaster altilis sp. n. (Acari: Astigmata), from tree sap: Evidence of morphological and ecological niche conservatism, with a review of fossil Astigmata". Acarologia. 65 (1): 213–241. doi: 10.24349/c35e-8bmj .
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7. Lourenço, W. R.; Velten, J. (2025). "One more new species for the genus Cretaceoushormiops Lourenço, 2018 from Cretaceous Burmite (Scorpiones: Protoischnuridae)". Faunitaxys. 13 (2): 1–6. doi:10.57800/faunitaxys-13(02).
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10. Xuan, Q.; Prendini, L.; Engel, M. S.; Cai, C.; Huang, D. (2025). "Extinct scorpion family Chaerilobuthidae from Mid-Cretaceous Burmese amber reinterpreted as subfamily of extant family Pseudochactidae (Chelicerata: Scorpiones)". Zoological Journal of the Linnean Society. 203 (1). zlae169. doi:10.1093/zoolinnean/zlae169.
11. Porta, A. O.; Mamani, V.; Arce, S. I.; Guerrero, E. L.; Proud, D. N.; Ramírez, M. J. (2025). "Morphological stasis in the mite family Caeculidae: Caeculus aeternus sp. nov., a remarkable fossil species of rake-legged mite from Baltic amber". Historical Biology: An International Journal of Paleobiology. doi:10.1080/08912963.2025.2481521 (inactive 4 April 2025).
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21. Baucon, A.; Avanzini, M.; Neto De Carvalho, C.; Belaústegui, Z.; Preto, N.; Breda, A. (2025). "The earliest evidence of true crabs? Insights on the evolution of Brachyura from an exceptional exposure of Carnian Psilonichnus (Upper Triassic, Braies, Dolomites, Italy)". Palaeogeography, Palaeoclimatology, Palaeoecology. 667. 112820. Bibcode:2025PPP...66712820B. doi:10.1016/j.palaeo.2025.112820.
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