Romeriida

From Palaeos

Following remarks on this taxon are from Laurin & Reisz (1995):
"Definition: The last common ancestor of Paleothyris and diapsids, and all its descendants.
Romeriids (family Romeriidae) traditionally included several genera of uncertain taxonomic affinities (collectively called protorothyridids) and Romeria, a captorhinid. The altered taxonomic unit Romeriida (Gauthier et al., 1988) now includes diapsids in addition to Paleothyris and perhaps other protorothyridids, but Romeria must be excluded from this taxon."
Laurin & Reisz (1995) used Paleothyris instead of Prototrothyrididae in their definition of Romeriida because the protorothyridids are not that well defined and seem to be paraphyletic or even polyphyletic.

[edit] References

GAUTHIER J., KLUGE A.G. and ROWE T. (1988): The early evolution of the Amniota. pp. 103-105 in BENTON, M.J. (ed.) The Phylogeny And Classification Of The Tetrapods. Clarendon Press, Oxford, UK
LAURIN, M. and REISZ, R.R. (1995): A reevalutaion of early amniote phylogeny. Zool. J. Linn. Soc., 113(2), pp. 165-223