Kinosternon arizonense is an extinct species of mud turtle in the genus Kinosternon. Initially described by Charles W. Gilmore in 1922. In 2016 McCord examined available Pliocene material of K. arizonense and concluded that the fossil material differs significantly from the extant turtles.MCCord, R.D. 2016. What is Kinosternon arizonense? Historical Biology 28:310–315 Joyce and Bourque (2016) concurred.Joyce, W.G. and Bourque, J.R. 2016. A review of the fossil record of turtles of the clade Pan-Kinosternoidea. Bulletin of the Peabody Museum of Natural History 57:57–95. Rhodin et al. (2017), listed Kinosternon arizonense as extinct.
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