Archelosauria

Archelosaurs; Temporal range: Possible Capitanian records.
	Proganochelys quenstedti
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade:	Sauria
Clade:	Archelosauria; Crawford et al., 2015
Subgroups
	Pantestudines; (Includes turtles and their extinct relatives); Archosauromorpha; (Includes archosaurs and their extinct relatives); ? †Ichthyosauromorpha ; (Includes ichthyosaurs and relatives); ? †Sauropterygia ; (Includes plesiosaurs and relatives); ? †Thalattosauria ; (Includes thalattosaurs);

Archelosauria is a clade grouping turtles and archosaurs (birds and crocodilians) and their fossil relatives, to the exclusion of lepidosaurs (the clade containing lizards, snakes and the tuatara). The majority of phylogenetic analyses based on molecular data (e.g. DNA and proteins) have supported a sister-group relationship between turtles and archosaurs. On the other hand, Archelosauria had not been historically supported by most morphological analyses, which have instead found turtles to either be descendants of parareptiles, early-diverging diapsids outside of Sauria, or close relatives of lepidosaurs within the clade Ankylopoda. Some recent morphological analyses have also found support for Archelosauria.

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