*Department of Zoology, Erindale Campus, University of Toronto, 3359 Mississauga Road, Mississauga, Ontario, Canada L5L 1C6.
The osteology of a Lower Permian eosuchian from Texas and a review of diapsid phylogeny
Article first published online: 28 JUN 2008
Zoological Journal of the Linnean Society
Volume 101, Issue 1, pages 59–95, January 1991
How to Cite
LAURIN, M. (1991), The osteology of a Lower Permian eosuchian from Texas and a review of diapsid phylogeny. Zoological Journal of the Linnean Society, 101: 59–95. doi: 10.1111/j.1096-3642.1991.tb00886.x
- Issue published online: 28 JUN 2008
- Article first published online: 28 JUN 2008
- Revised manuscript received June 1989, accepted for publication April 1990
Apsisaurus witteri (gen. et sp. nov.. from the Lower Permian of Texas is identified as a diapsid, based on the presence of both a lateral temporal fenestra and a suborbital fenestra. Derived characters shared with neodiapsids but not with araeoscelidians suggest that Apsisaurus is more closely related to modern diapsids than to araeoscelidians. A phylogenetic analysis suggests that younginiforms are not part of the crown group of diapsids.