Adocus

Adocus; Temporal range: Early Cretaceous - Oligocene, 125–28 Ma PreꞒ Ꞓ O S D C P T J K Pg N
	Shell of Adocus beatus, Peabody Museum of Natural History
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Testudines
Suborder:	Cryptodira
Family:	†Adocidae
Subfamily:	†Adocinae
Genus:	†Adocus; Cope, 1868
Type species
	†Adocus beatus; Leidy, 1865
Species
	See text

Adocus is an extinct genus of aquatic turtles belonging to the family Adocidae.

Description

Species of the genus Adocus had flattened and smoothly contoured shells with horny sculptured plates. The shells could reach a length of at least 50 centimetres (1.6 ft) for North American species, some species like A. kohaku had carapace length of 60 centimetres (2.0 ft).^[1] The largest species, A. kirtlandius had carapace reaching 113 centimetres (3.71 ft).^[2] These large freshwater turtles had an omnivorous diet. They lived from the Late Cretaceous to the Paleocene in North America, but in Asia, they were also present during the Oligocene.

Distribution

These turtles have been found in Cretaceous to Paleogene of Canada, United States, Mongolia, China, Japan, Kazakhstan, Tajikistan, and Uzbekistan.

Species

Adocus agilis
Adocus aksary
Adocus beatus, type species (synonyms: A. punctatus, A. lacer)
Adocus bossi
Adocus bostobensis
Adocus dzhurtasensis
Adocus firmus
Adocus foveatus
Adocus hesperius
Adocus kirtlandius
Adocus kizylkumensis
Adocus kohaku
Adocus lineolatus
Adocus onerosus
Adocus orientalis
Adocus pravus
Adocus sengokuensis
Adocus syntheticus

References

^ Hirayama*, Ren; Sonoda, Teppei; Uno, Hikaru; Horie, Kenji; Tsutsumi, Yukiyasu; Sasaki, Kazuhisa; Takisawa, Shunsuke Mitsuzuka and Toshio (2022-03-14). "Adocus Kohaku, A New Species of Aquatic Turtle (Testudines: Cryptodira: Adocidae) from the Late Cretaceous of Kuji, Iwate Prefecture, Northeast Japan, with Special References to the Geological Age of the Tamagawa Formation (Kuji Group) LSID urn:lsid:zoobank.org:act:61376EEE-A386-416E-98AE-FF64FE2597A2". International Journal of Paleobiology & Paleontology. 4 (1).
^ Farina, Bruna M.; Godoy, Pedro L.; Benson, Roger B. J.; Langer, Max C.; Ferreira, Gabriel S. (2023). "Turtle body size evolution is determined by lineage-specific specializations rather than global trends". Ecology and Evolution. 13 (6): e10201. Bibcode:2023EcoEv..1310201F. doi:10.1002/ece3.10201. ISSN 2045-7758. PMC 10293707. PMID 37384241.

The Paleobiology Database
Paleocene Mammals
Recently Collected Specimen of Adocus
E.V. Syromyatnikova and I.G. Danilov [1]
Yale Digital Content

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[1] Hirayama*, Ren; Sonoda, Teppei; Uno, Hikaru; Horie, Kenji; Tsutsumi, Yukiyasu; Sasaki, Kazuhisa; Takisawa, Shunsuke Mitsuzuka and Toshio (2022-03-14). "Adocus Kohaku, A New Species of Aquatic Turtle (Testudines: Cryptodira: Adocidae) from the Late Cretaceous of Kuji, Iwate Prefecture, Northeast Japan, with Special References to the Geological Age of the Tamagawa Formation (Kuji Group) LSID urn:lsid:zoobank.org:act:61376EEE-A386-416E-98AE-FF64FE2597A2". International Journal of Paleobiology & Paleontology. 4 (1).

[2] Farina, Bruna M.; Godoy, Pedro L.; Benson, Roger B. J.; Langer, Max C.; Ferreira, Gabriel S. (2023). "Turtle body size evolution is determined by lineage-specific specializations rather than global trends". Ecology and Evolution. 13 (6): e10201. Bibcode:2023EcoEv..1310201F. doi:10.1002/ece3.10201. ISSN 2045-7758. PMC 10293707. PMID 37384241.

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