Concise hierarchy

(Kingdom) Animalia - (Phylum) Chordata - (Class) Reptilia

Phylogeny

Branch-based clade

Ref: M.J. Benton, 1985: 112. [implicit]

Defined by the more inclusive clade (except the excluded taxon)

Diapsida (Clade) Osborn 1903 [Laurin 1991]

Ref: M.J. Benton, 1985: 112 ("all diapsid reptiles").

Defined by excluded taxon

†Petrolacosaurus (Genus) Lane, 1945

Ref: M.J. Benton, 1985: 112 ("and a few other groups").

Branch-based clade

Neodiapsida (Clade) Benton 1985

Ref: R.R. Reisz et al., 2011: 3733.

Node-based clade

Neodiapsida (Clade) Benton 1985

Ref: M. Laurin, 1991: 85.

Original entries

Sauria (Clade) McCartney 1802 [Gauthier, Kluge & Rowe 1988], nom. cl. inval.

Ref: M. Laurin, 1991: 83, fig. 11.

Current position

Diapsida (Clade) Osborn 1903 [Gauthier & de Queiroz 2020]

Ref: M.J. Benton, 2015: box 5.1 (p. 124); Benton et al., 2015: 52. [implicit]

Alternative positions

Diapsida (Subclass) Osborn, 1903	Ref: M.J. Benton, 2005: box 5.1 (p. 114).
Diapsida (Clade) Osborn 1903 [Laurin 1991]	Ref: M.J. Benton, 2015: box 5.1 (p. 124); Benton et al., 2015: 52.
Eosuchia (Clade) Broom 1914 [Laurin 1991]	Ref: R.V. Hill, 2005: fig. 5.

Historical positions

Diapsida (Clade) Osborn 1903 [Laurin 1991]	Ref: R.R. Reisz et al., 2011: 3733. [emended diagnosis]
Eosuchia (Clade) Broom 1914 [Laurin 1991]	Ref: R.V. Hill, 2005: fig. 5.
Diapsida (Subclass) Osborn, 1903	Ref: M.J. Benton, 2005: box 5.1, fig. 6.6.
Diapsida (Clade) Osborn 1903 [Laurin 1991]	Ref: M.J. Benton, 2004: fig. 1.2. [out of scope (coherent)]
Eosuchia (Clade) Broom 1914 [Laurin 1991]	Ref: M. Laurin, 1991: 83, 85-86, fig. 11. [emended diagnosis]

Number of Subtaxa

2025	Available in Systema Naturae 2000	35o;301f;3344g;20,060s;7724ss;1v;1; ‡2o;7f;60g;278s;65ss; †48o;292f;1559g;913s;3ss;104
1989-present	Systema Naturae 2000	[4c;35o;267f;3145g;17,872s]