Entity:

Concise hierarchy

Included, by definition, in branch-based clade

Ref: D.G. DeMar Jr. et al., 2022: 47 (Hsiou et al., 2015: 4).

Ref: D.G. DeMar Jr. et al., 2022: 47. [implicit]

†*Clevosauridae* (Clade) Fraser 1993 [Bonaparte & Sues 2006]	Ref: D.G. DeMar Jr. et al., 2022: 47.
*Sphenodontinae* (Subfamily) Cope, 1871	Ref: O. Kuhn, 1969

†*Clevosauridae* (Clade) Fraser 1993 [Bonaparte & Sues 2006]	Ref: D.G. DeMar Jr. et al., 2022: 47.
*Sphenodontinae* (Subfamily) Cope, 1871	Ref: O. Kuhn, 1969

2024	Available in Systema Naturae 2000	†7s
2022	D.G. DeMar Jr. et al.: 47	†6s