Kinosternon flavescens (Agassiz 1857:430)

Syntypes (5): MCZ 1918(Barbour&Loveridge 1946:173; formerly USNM 61; Reynolds et al. 2007:29), 1919 (Barbour & Loveridge 1946:173; formerly USNM 83 (Reynolds et al. 2007:29); USNM 50, 86 (now lost; Reynolds et al. 2007:29), 7892 (formerly USNM 68; possibly a misidentified K. sonoriense; Reynolds et al. 2007:29), 131823 (formerly USNM 51, and later USNM 7867; Reynolds et al. 2007:29). The confused history of the syntypes is detailed in Reynolds et al. (2007:29). USNM 50 designated lectotype by Iverson (1978:478).

Kinosternon flavescens spooneri Smith 1951:195

Holotype: INHS 4244; paratypes (23), CHAS 15687; FMNH 37992-93 (only 37992 reported by Marx 1958:450); INHS 3220-22, 4245, 5587-89, 5898, 5987-88, and 6010-11; UIMNH 2252-56 (Smith et al. 1964:36 omitted 2254); UMMZ 74654 and 103089 (Kluge 1984:81); USNM 83190 (Cochran 1961:232; Reynolds et al. 2007:27).