Temporal range: Early Cretaceous - Oligocene, 125–28 Ma
Adocidae - Adocus punctatus.jpg
Shell of Adocus beatus, Peabody Museum of Natural History
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Reptilia
Order: Testudines
Suborder: Cryptodira
Family: Adocidae
Subfamily: Adocinae
Genus: Adocus
Cope, 1868
Type species
Adocus beatus
Leidy, 1865

See text

Adocus is an extinct genus of aquatic turtles belonging to the family Adocidae. Adocus was once considered to belong to the family Dermatemyidae.

Skull and shell of Glyptops ornatus, and shell of Adocus beatus
Skull and shell of Glyptops ornatus, and shell of Adocus beatus


Species of the genus Adocus had flattened and smoothly contoured shells with horny sculptured plates. The shells could reach a length of about 80 cm. 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.


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



  1. ^ "[Paleontology • 2021] 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)".