Adspersus infact have a white dot on the ear drum. As do Dwarfs. Neither of them have that spot as adults,
OK, time to eliminate the confusion.

Pyxicephalus adspersus

  1. Upper jaw withour irregular vertical pale bars
  2. No white spot on tympanum (ear drum)
  3. No pale interorbital bar
  4. Distance from eye to tympanum is about twice the diameter of the eye
Pyxicephalus edulis

  1. Upper jaw with irregular pale bars
  2. White spot on tympanum
  3. Distance from eye to tympanum is about the same as the diameter of the eye
There is a third species, Pyxicephalus obbianus (Calabresi's Bullfrog) that I have not seen in the pet tade and is endemic to Somalia. At one time, the genus Pyxicephalus had about 12 species, most of the smaller species moving into the genus Tomopterna (or sand frogs, native to Africa and India).

I hope this helps [/QUOTE]