Quote Originally Posted by GrifTheGreat View Post
You can know for sure because they're not the same species. Pyxies are closely related to Rana species rather than Ceratophrys. Ceratophrys are more closely related to Tree Frogs and other such species. They're not compatible.
http://en.m.wikipedia.org/wiki/Afric...frog#section_5 doesn't that say that bullfrogs are part of the ranadae family?
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