Concise hierarchy

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

Current position

†Proterochampsia (Order) Bonaparte, 1971

Ref: T.L. Ford, 2005-present: [23 Jun 2026]; Paleofile[23 Jun 2026]; Müller, 2025: fig. 4.

Alternative positions

†Archaeosuchia (Suborder) Sill, 1967	Ref: G. Olshevsky, 1991: 39.
Archosauria (Division) Cope, 1869	Ref: M.J. Benton, 2004: fig. 1.8A. [inferred rank] [implicit]
Archosauria (Clade) Cope 1869 [Gauthier & Padian 1985], nom. cl. inval.	Ref: M.J. Benton, 2004: fig. 1.8A. [inferred rank]
†Proterosuchia (Suborder) Broom, 1906	Ref: R.L. Carroll, 1988: App. (p. 619).

Historical positions

Archosauria ([unranked]) Cope, 1869	Ref: M.J. Benton, 2004: 15 (fig. 1.8A). [out of scope (coherent)]
†Archaeosuchia (Suborder) Sill, 1967	Ref: G. Olshevsky, 1991: 39.
Archosauria ([unranked]) Cope, 1869	Ref: M.J. Benton, 1990: 15, fig. 1.1.
†Proterosuchia (Suborder) Broom, 1906	Ref: R.L. Carroll, 1988: App. (p. 619).

Number of Subtaxa

2026	Available in Systema Naturae 2000	†12g;4s;2
1989-present	Systema Naturae 2000: 23 Jun 2026	[; †12g]
1991	G. Olshevsky: 39	†4[5]g;5s
1988	R.L. Carroll: 619	[; †4g]