Ok guys and gals. No need to argue and call names. Truth is that this could not happen. Roughly put if you saw a man procreating with a Chimpanzee(our closest relative) nothing would come of it. Despite the difference between amphibians and mammals the same concept applies. The two would produce no offspring because the sperm would be rejected due to genetic differences no matter how minute. They are still so different no matter how similar they appear. They're genetically incompatible.
Lets leave it at that please before this gets out of hand.I believe apologies are in order here as well.