Heres a few

Cranwell's horned frog - Wikipedia, the free encyclopedia
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Surinam horned frog - Wikipedia, the free encyclopedia
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Fantasy Pacman http://www.reptilia.org.uk/ekmps/sho...rog-7176-p.jpg

Then theres the Ornata (Ornate, Argentine) Argentine horned frog - Wikipedia, the free encyclopedia

And the impossible to come by Brazilian Horned Frog. Good luck getting this one tho
The Frog Ranch :: Animals :: Brazilian Horned Frog