Named By: Edward Drinker Cope - 1868.
Synonyms: Adocus punctatus, Adocus lacer.
Classification: Chordata, Reptilia, Testudines, Cryptodira, Adocidae, Adocinae.
Species: A. beatus (type), A. agilis, A. aksary, A. bossi, A. bostobensis, A. dzhurtasensis, A. firmus, A. foveatus, A. hesperius, A. inexpectatus, A. kirtlandius, A. kizylkumensis, A. lineolatus, A. onerosus, A. orientalis, A. planus, A. pravus, A. sengokuensis, A. syntheticus
Size: Shells up to 80 centimetres long.
Known locations: Canada, Alberta - Dinosaur Park Formation, Foremost Formation, Oldman Formation; Saskatchewan - Ravenscrag Formation. China - Youganwo Formation. Japan - Kitadani Formation, Sengoku Formation, Tamagawa Formation. Kazakhstan - Bostobe Formation, Syuksyuk Formation . Mexico - Cerro del Pueblo Formation. Mongolia - Barun Goyot Formation, Baynshire Formation, Dohoin Usu Formation. Tajikistan - Palvantash Formation, Yalovach Formation. USA, Arizona - Fort Crittenden Formation; Colorado - Laramie Formation; Maryland -Brightseat Formation; Missouri - Ripley Formation; Montana - Hell Creek Formation, Judith River Formation; New Jersey - Hornerstown Formation, Navesink Formation, Marshalltown Formation; New Mexico - Fruitland Formation, Kirtland Formation; North Carolina - Tar Heel Formation; North Dakota - Hell Creek Formation; South Carolina - Rhems Formation, Williamsburg Formation; South Dakota - Hell Creek Formation; Texas - Aguja Formation; Utah - Masuk Formation; Wyoming - Ferris Formation, Lance Formation. Uzbekistan - Bissekty Formation, Khodzhakul Formation, Sultanbobin Formation.
Time period: Barremian of the Early Cretaceous through to the end of the Oligocene.
Fossil representation: Multiple specimens, some almost complete.
Adocus is a genus of freshwater cryptodiran turtle that lived in both Asia and North America. Most Canadian and American fossils are confirmed as coming from Cretaceous deposits, however some fossils are determined as coming from deposits after the Cretaceous, with some as recent as the late Oligocene. Adocus is known to have inhabited freshwater where it is thought to have had an omnivorous diet.
- On some Cretaceous Reptilia. - Proceedings of the Academy of Natural Sciences of Philadelphia 20:233-242. - Edward Drinker Cope - 1868.
- Reptilian faunas of the Torrejon, Puerco, and underlying Upper Cretaceous formations of San Juan County, New Mexico. - United States Geological Survey Professional Paper 119:1-68. - C. W. Gilmore - 1919.
- The skeletal morphology of the Cretaceous cryptodiran turtle, Adocus, and the relationships of the Trionychoidea. - American Museum novitates, no. 2941. - Peter Andre Meylan & Eugene S. Gaffney - 1989.
- New taxa of Mesozoic turtles from Mongolia. - Fossil Turtle Research 1:119-127. - V. B. Sukhanov & P. Narmandakh - 2006.
-New Material and a Revision of Turtles of the Genus Adocus (Adocidae) from the Late Cretaceous of Middle Asia and Kazakhstan. - Proceedings of the Zoological Institute RAS Vol. 313, No. 1, рр. 74–94. - E. V. Syromyatnikova & I. G. Danilov - 2009.
- The first ‘true’ Adocus (Testudines, Adocidae) from the Paleogene of Asia. - Journal of Vertebrate paleontology - Igor Gennadievich Danilov, Elena Syromyatnikova, Pavel P. Skutschas, T. M. Kodrul & Jianhua Jin - 2013.
- A new species of the genus Adocus (Adocidae, Testudines) from the Lower Cretaceous of Southwest Japan. - Paleontological Research 19(1):26-32. - T. Sonoda, R. Hirayama, Y. Okazaki & H. Ando - 2015.