Platemys platycephala melanonota Ernst 1983:350

Holotype: USNM 224136; paratypes (25), LACM 134906-14, MVZ 158995, 163036-42, and 175379 (Rodríguez-Robles et al. 2003:65); USNM 224132-35, and 224137-39 (Reynolds et al. 2007:9).