Carusioidea
| Carusioidea Temporal range: Late Cretaceous - present | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | Squamata |
| Clade: | Toxicofera |
| Infraorder: | Anguimorpha |
| Clade: | Carusioidea Gao and Norell, 1998 |
| Subgroups | |
Carusioidea is a clade (evolutionary grouping) of lizards that includes the family Xenosauridae (knob-scaled lizards) from Central America and the extinct genus Carusia from the Late Cretaceous of Mongolia. It was named in 1998 after a sister-group relationship was found between Carusia and Xenosauridae. Phylogenetic analysis indicates that Carusioidea is the most basal clade within Anguimorpha. Features that help define Carusioidea include closely spaced orbits or eye sockets separated by fused frontal bones, a connection between the jugal and squamosal bones below the supratemporal arch, and a covering of bony osteoderms over the skull roof. Below is a cladogram showing the phylogenetic relationships of carusioids from Gao and Norell (1998):[1]
| Squamata (lizards) |
*Shinisaurus is no longer considered a xenosaurid but rather a varanoid lizard[2] | ||||||||||||||||||||||||||||||||||||||||||
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References
- ↑ Gao, K.; Norell, M. (1998). "Taxonomic revision of Carusia (Reptilia, Squamata) from the late Cretaceous of the Gobi Desert and phylogenetic relationships of anguimorphan lizards". American Museum Novitates (3230): 1–55.
- ↑ Bhullar, B. A. S. (2011). "The Power and Utility of Morphological Characters in Systematics: A Fully Resolved Phylogeny of Xenosaurus and Its Fossil Relatives (Squamata: Anguimorpha)". Bulletin of the Museum of Comparative Zoology. 160 (3): 65–18. doi:10.3099/0027-4100-160.3.65.