Xantusiidae Baird, 1859

Conrad, J. L., 2008, Phylogeny And Systematics Of Squamata (Reptilia) Based On Morphology, Bulletin of the American Museum of Natural History 2008 (310), pp. 1-182 : 100

Xantusiidae Baird, 1859

(figs. 54C, 55C, 56B)

DEFINITION: Xantusia vigilis , Cricosaura typica , Lepidophyma flavimaculatum , Palaeoxantusia kyrentos , and all descendants of their last common ancestor.

DIAGNOSIS: Xantusiids, as defined here, are united by 89(0) contact between supratemporal arch bones and frontal and parietal unforked, 93(2) postfrontal contacting the parietal for more than one-half the length of the parietal table, 94(1) fused postorbitofrontal, 114(0) no development of the secondary palate, 126(1) ectopterygoid exposed on the lateral skull surface posterior to the maxilla, 180(1) elongate lateral portion of the dentary extending along the mandible to a point at least half way between the coronoid eminence and the mandibular glenoid, 181(2) closed and fused Meckel’s canal, and 189(1) splenial not extending anterior to the midpoint of the dentary tooth row.