Concise hierarchy

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

Phylogeny

Paraphyletic/Ancestral (para)

Ref: G. Olshevsky, 1991: 149 ("Paraorder").

Original position

†Ornithischia (Superorder) Seeley, 1887

Ref: G. Olshevsky, 1991: 149.

Original entries

†Alocodon (Genus) Thulborn, 1973, nom. dub.		Ref: G. Olshevsky, 1991: 149.
†Fabrosaurus (Genus) Ginsburg, 1964, nom. dub.		Ref: G. Olshevsky, 1991: 149.
†Lesothosauridae (Family) Halstead & Halstead, 1981		Ref: G. Olshevsky, 1991: 149.
Questionably †Nanosaurus (Genus) Marsh, 1877		Ref: G. Olshevsky, 1991: 149 ("referred to this family provisionally").
Questionably †Technosaurus (Genus) Chatterjee, 1984		Ref: G. Olshevsky, 1991: 149 ("provisional").
†Trimucrodon (Genus) Thulborn, 1973, nom. dub.		Ref: G. Olshevsky, 1991: 149.

Current position

†Ornithischia (Clade) Seeley 1887 [Padian & May 1993]

Ref: PBDB: 27 Oct 2013 (Olshevsky, 1992).

Alternative positions

†Ornithischia (Superorder) Seeley, 1887

Ref: G. Olshevsky, 1991: 149. [new taxon]

Historical positions

†Ornithischia (Superorder) Seeley, 1887

Ref: G. Olshevsky, 1991: 149. [new taxon]

Number of Subtaxa

1991

G. Olshevsky: 149

†1f;6(2)g;7(2)s