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Re: Late Jurassic salamander from Liaoning, China (free pdf)
- To: dinosaur@usc.edu
- Subject: Re: Late Jurassic salamander from Liaoning, China (free pdf)
- From: "David Marjanovic" <david.marjanovic@gmx.at>
- Date: Tue, 13 Mar 2012 19:12:52 +0100
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> 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.