Concise hierarchy

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

Subsequent positions

†Marginocephalia (Hypoorder) Sereno, 1986

Ref: P. Sereno, 1986: 252.

Original entries

†Neoceratopsia (Infraorder) Sereno, 1986

Ref: P. Sereno, 1986: 252.

Current position

†Ornithischia (Order) Seeley, 1887

Ref: D. Lambert & the Diagram Group, 1991(1997): 109.

Alternative positions

†Marginocephalia (Hypoorder) Sereno, 1986

Ref: P. Sereno, 1986: 252. [new position]

Historical positions

†Ornithischia (Order) Seeley, 1887	Ref: 1998
†Ornithischia (Order) Seeley, 1887	Ref: D. Lambert & the Diagram Group, 1991(1997): 109.
†Ornithischia (Order) Seeley, 1887	Ref: P. Uetz, [1995-]1996: 30 Dec 1996.
†Ornithischia (Order) Seeley, 1887	Ref: 1995
†Ornithischia (Order) Seeley, 1887	Ref: R.L. Carroll, 1988: App. (p. 622).
†Ornithischia (Order) Seeley, 1887	Ref: A.S. Romer & T.S. Parsons, 1986: App. 1 (p. 623).
†Marginocephalia (Hypoorder) Sereno, 1986	Ref: P. Sereno, 1986: 252. [new position]
†Ornithischia (Order) Seeley, 1887	Ref: H.-P. Schultze et al., 1985: 2, 50.
†Ornithischia (Order) Seeley, 1887	Ref: T.I. Storer et al., 1979
†Ornithischia (Order) Seeley, 1887	Ref: B. Grzimek et al., 1973 (1971): 596.

Number of Subtaxa

1989-present	Systema Naturae 2000	†25g
1991(1997)	D. Lambert & the Diagram Group	[; †3f]
[1995-]1996	P. Uetz: 30 Dec 1996	[; †4f]
1988	R.L. Carroll: App. (p. 622)	[; †3f;18g]
1973 (1971)	B. Grzimek et al.: 596	[; †4f]