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Re: Incisivosaurus gauthieri images



Fam Jansma wrote:

> Has anyone noticed the similarities in the dentition between this new genus
> and that of Protoarchaeopteryx with the LARGE premaxillary teeth?

The procumbent premaxillary teeth of _Protarcheopteryx_ are described as bearing
needle-like crowns and bulbous roots and showing minute serrations.  This
description does not match the large rodent-like _Incisivosaurus_ two front
teeth and the remaining three premaxillary pairs of much smaller, more slender,
unserrated, subconical teeth.  Furthermore, the mode of preservation and the
strata do not compare either, as _Incisivosaurus_ predates _Protarchaeopteryx_.
Unfortunately, there is little overlap for comparison between the two genera,
but at present it appears safe to assume that these are distinct theropods.

--------Ralph W. Miller III
            ralph.miller@alumni.usc.edu