Scincogekkonomorpha

Scincogekkonomorpha; Temporal range: Middle Jurassic–Present PreꞒ Ꞓ O S D C P T J K Pg N
	White-headed dwarf gecko (Lygodactylus picturatus)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Clade:	Scincogekkonomorpha; Sukhanov, 1961
Subgroups
	†Ardeosaurus; †Bavarisauridae; †Eichstaettisaurus; †Jucaraseps; †Liushusaurus; †Parviraptor; †Pedrerasaurus; †Saurillodon; †Scandensia; †?Yabeinosaurus; †Polyglyphanodontia; Scleroglossa

Scincogekkonomorpha is a proposed clade (evolutionary grouping) of lizards that includes scleroglossans and all lizards more closely related to scleroglossans than to iguanians. These "stem" scleroglossans include extinct lizards from the Late Jurassic and Early Cretaceous such as Bavarisaurus, Eichstaettisaurus, Liushusaurus, and Scandensia.^[1] Scincogekkonomorpha was named in 1961 and is now occasionally used as a stem-based taxon in contrast to the node-based taxon Scleroglossa. According to phylogenies based on morphological characteristics, Scincogekkonomorpha is the sister taxon of Iguania and together they make up crown group Squamata, the smallest clade including all living snakes and lizards.^[2] The grouping has not been recovered as monophyletic in recent molecular studies, with Iguania generally found deeply nested within Squamata.^[3]

References

^ Susan E. Evans; Yuan Wang (2010). "A new lizard (Reptilia: Squamata) with exquisite preservation of soft tissue from the Lower Cretaceous of Inner Mongolia, China". Journal of Systematic Palaeontology. 8 (1): 81–95. doi:10.1080/14772010903537773. S2CID 56046960.
^ Conrad, J. L. (2008). "Phylogeny and Systematics of Squamata (Reptilia) Based on Morphology" (PDF). Bulletin of the American Museum of Natural History. 310: 1–182. doi:10.1206/310.1. hdl:2246/5915. S2CID 85271610.
^ Xing, Lida; Niu, Kecheng; Evans, Susan E. (January 2023). "A new polyglyphanodontian lizard with a complete lower temporal bar from the Upper Cretaceous of southern China". Journal of Systematic Palaeontology. 21 (1). doi:10.1080/14772019.2023.2281494. ISSN 1477-2019.

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[EW10-1] Susan E. Evans; Yuan Wang (2010). "A new lizard (Reptilia: Squamata) with exquisite preservation of soft tissue from the Lower Cretaceous of Inner Mongolia, China". Journal of Systematic Palaeontology. 8 (1): 81–95. doi:10.1080/14772010903537773. S2CID 56046960.

[CJL08-2] Conrad, J. L. (2008). "Phylogeny and Systematics of Squamata (Reptilia) Based on Morphology" (PDF). Bulletin of the American Museum of Natural History. 310: 1–182. doi:10.1206/310.1. hdl:2246/5915. S2CID 85271610.

[3] Xing, Lida; Niu, Kecheng; Evans, Susan E. (January 2023). "A new polyglyphanodontian lizard with a complete lower temporal bar from the Upper Cretaceous of southern China". Journal of Systematic Palaeontology. 21 (1). doi:10.1080/14772019.2023.2281494. ISSN 1477-2019.

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