Pyxicephalus, Tschudi, 1838, Tschudi, 1838

Preez, Louis H du, Netherlands, Edward C, and, Mark-Oliver Rödel & Channing, Alan, 2024, A new bullfrog from southern Africa (Pyxicephalidae, Pyxicephalus Tschudi, 1838), African Journal of Herpetology 73 (1), pp. 61-89 : 85

Key to the described species of southern and eastern African bullfrogs

1a. Tympanum larger than eye, known from Somalia......................... Pyxicephalus obbianus

1b. Tympanum equal or smaller than eye ............................................................................................ 2

2a. White mark on tympanum (sometimes faint), dorsal vertebral stripe usually present ......................................................................................................................................................................... 3

2b. No white mark on tympanum, no dorsal vertebral stripe ......... Pyxicephalus adspersus

3a. Longitudinal dorsal ridges present, with speckling between dorsal mottles ................. 4

3b. Oval warts on dorsum, no speckles between dorsal mottles ...... Pyxicephalus angusticeps

4a. No pale crossbar between eyes, upper jaw barring absent (or faint), no cream-coloured lateral stripes or mottles, tympanum smaller than eye-tympanum distance ........................................................................................................................................... Pyxicephalus beytelli

4b. Pale crossbar between eyes, sometimes incomplete; upper jaw barring present, cream-coloured lateral stripes or mottles present, tympanum larger than eye-tympanum distance ........................................................................................................................... Pyxicephalus edulis