Gekkonomorpha

Gekkonomorpha; Temporal range: Early Cretaceous - Present
	Gekko gecko, a species used to define Gekkonomorpha
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Informal group:	Scleroglossa
Clade:	Gekkonomorpha; Fürbringer, 1900
Subgroups
	Gekkota; †Ardeosauridae; †Eichstaettisaurus?; †?Gobekko; †?Hoburogekko; †Norellius; †?Parviraptor

Gekkonomorpha is a clade of lizards that includes geckos and their closest relatives. Although it was first named in 1900, Gekkonomorpha was not widely used as a formal taxon until it was given a phylogenetic definition in the 1990s.[1] Under this definition, Gekkonomorpha is a stem-based taxon containing the node-based taxon Gekkota, the group that includes the last common ancestor of all living geckos and its descendants. The extent of Gekkonomorpha beyond gekkotans differs between studies.[2] For example, Lee (1998) defined Gekkonomorpha in such a way that it included not only Gekkota but the legless amphisbaenian and dibamid lizards as well.[2][3] The phylogenetic analysis of Conrad (2008), which did not support a close relationship between geckos and legless lizards, used Gekkonomorpha in a much more restrictive sense so that it included only Gekkota and a few extinct lizards more closely related to Gekkota than to any other living group of lizards (making them "stem" gekkotans).[1] Some of the most recent phylogenetic analyses suggest that the extinct lizards Gobekko and Parviraptor may be stem gekkotans, although other analyses find that Gobekko may instead be within Gekkota and Parviraptor outside Gekkonomorpha.[2][4]

References

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.
Daza, J. D.; Bauer, A. M.; Snively, E. (2013). "Gobekko cretacicus (Reptilia: Squamata) and its bearing on the interpretation of gekkotan affinities". Zoological Journal of the Linnean Society. 167 (3): 430. doi:10.1111/zoj.12012.
Lee, M. S. Y. (1998). "Convergent evolution and character correlation in burrowing reptiles: Towards a resolution of squamate relationships". Biological Journal of the Linnean Society. 65 (4): 369–453. doi:10.1111/j.1095-8312.1998.tb01148.x.
Daza, J. D.; Alifanov, V. R.; Bauer, A. M. (2012). "A redescription and phylogenetic reinterpretation of the fossil lizard Hoburogekko suchanovi Alifanov, 1989 (Squamata, Gekkota), from the Early Cretaceous of Mongolia". Journal of Vertebrate Paleontology. 32 (6): 1303. doi:10.1080/02724634.2012.702706. S2CID 84817594.

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[CJL08-1] 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.

[DBS13-2] Daza, J. D.; Bauer, A. M.; Snively, E. (2013). "Gobekko cretacicus (Reptilia: Squamata) and its bearing on the interpretation of gekkotan affinities". Zoological Journal of the Linnean Society. 167 (3): 430. doi:10.1111/zoj.12012.

[LMSY98-3] Lee, M. S. Y. (1998). "Convergent evolution and character correlation in burrowing reptiles: Towards a resolution of squamate relationships". Biological Journal of the Linnean Society. 65 (4): 369–453. doi:10.1111/j.1095-8312.1998.tb01148.x.

[DAB12-4] Daza, J. D.; Alifanov, V. R.; Bauer, A. M. (2012). "A redescription and phylogenetic reinterpretation of the fossil lizard Hoburogekko suchanovi Alifanov, 1989 (Squamata, Gekkota), from the Early Cretaceous of Mongolia". Journal of Vertebrate Paleontology. 32 (6): 1303. doi:10.1080/02724634.2012.702706. S2CID 84817594.