Gerobatrachus
(which was sometimes described in the popular press
as a "frog-amander"),
is an animal that lived in North America
during the Permian period about 290 million years ago.
Gerobatrachus has a number of features that appear to be
intermediate between frogs and salamanders, and thus provides
support that these two groups shared a common ancestor. It has
a frog-like ear and skull, salamander-like ankle bones, and
its backbone and teeth are similar to both those of frogs and salamanders.
Fossils of
the animal were discovered in
Texas in the 1990s.
The scientific description of the animal was first published in Nature
in
2008.
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