Concise hierarchy

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

Phylogeny

Paraphyletic/Ancestral (para)

Ref: G. Olshevsky, 1991: 157 ("Paraorder").

Subsequent entries

Questionably †Chaoyoungosauridae (Family) Zhao, 1983, nom. nud.

Ref: G. Olshevsky, 1991: 158 ("provisionally").

Current position

†Ornithischia (Subclass) Seeley, 1887

Ref: H.L. Levin, 2013: table 14-1 (p. 432). [implicit]

Alternative positions

†Dinosauria (Superorder) Owen, 1841	Ref: R.M. Sullivan, 2006: 347. [invalid/synonym] [assumed]
†Ornithischia (Superorder) Seeley, 1887	Ref: H.L. Levin, 2013: table 14-1 (p. 432).

Historical positions

†Ornithischia (Superorder) Seeley, 1887

Ref: G. Olshevsky, 1991: 157.

Number of Subtaxa

1991

G. Olshevsky: 157

†4[5]f;22(21)[24]g;24(20)s