The skull of a new eosuchian reptile from the Lower Jurassic of South Wales
Article first published online: 28 JUN 2008
Zoological Journal of the Linnean Society
Volume 70, Issue 3, pages 203–264, November 1980
How to Cite
EVANS, S. E. (1980), The skull of a new eosuchian reptile from the Lower Jurassic of South Wales. Zoological Journal of the Linnean Society, 70: 203–264. doi: 10.1111/j.1096-3642.1980.tb00852.x
- Issue published online: 28 JUN 2008
- Article first published online: 28 JUN 2008
- Accepted/or publication February 1980
- functional morphology;
- new taxa
The skull ol a new fossil reptile, Gephyrosaurus bridensis gen. et sp. Nov. is described. The description is based on a large collection of isolated, but well preserved skull bones from mammal-bearing fissure infills of Lower Jurassic age. The skull is diapsid with an incomplete lower temporal arcade and a fixed quadrate. Comparison with earlier non-archosaurian diapsid reptiles indicates that Gephyrosaurus is a member of the Eosuchia, an infraclass of the subclass Diapsida. The taxonomy of the Eosuchia and Squamata is discussed briefly and the use of streptostvly as a diagnostic squamate character is reviewed. Several Permian and Triassic genera, including Paliguana, Tanystropheus and Kuehneosaurus, which were previously classified as squamates, are eosuchians.
Gephyrosaurus was a small insectivore with large eyes and good hearing. It was diurnal and did not compete with the contemporary mammals Morganucodon and Kuehneotherium, which were nocturnal.