Takahashi, Akio, Kimihiko Ōki, Takahiro Ishido, and Ren Hirayama. 2013. “A New Species of the Genus Ocadia (Testudines: Geoemydidae) from the Middle Miocene of Tanegashima Island, Southwestern Japan and Its Paleogeographic Implications”. Zootaxa 3647 (4). Auckland, New Zealand:527–540. https://doi.org/10.11646/zootaxa.3647.4.3.