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Re: Late Jurassic salamander from Liaoning, China (free pdf)



> In contrast to extant salamandroids, however, the
> salamander shows a discrete and tooth-bearing palatine, and
> unequivocally nonpedicellate and monocuspid marginal teeth in large
> and presumably mature individuals.

These features aren't in contrast to extant salamandroids, but in contrast to 
extant metamorphosed salamanders. During metamorphosis, the palatine (with its 
teeth) disappears without a trace just like the coronoid (with its toothrow), 
and the monocuspid, nonpedicellate teeth are replaced by bicuspid, pedicellate 
ones; when there's no (complete) metamorphosis, the palatine stays, and the 
teeth don't change.