Concise hierarchy

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

Phylogeny

Paraphyletic/Ancestral (para)		Ref: M.J. Benton, 2005: 398.
Paraphyletic/Ancestral (para)		Ref: G. Olshevsky, 1991: 168 ("Parafamily").

Current position

†Hadrosauriformes (Clade) Sereno 1997

Ref: P.C. Sereno, 1998: table 4 (p. 62). [inferred rank]

Alternative positions

†Euornithopoda (Clade) Sereno 1986	Ref: M.J. Benton, 2005: 398. [implicit]
†Ornithopoda (Order) Marsh, 1881	Ref: G. Olshevsky, 1991: 168.
†Ornithopoda (Suborder) Marsh, 1871	Ref: D. Lambert & the Diagram Group, 1991(1997): 109.
†Styracosterna (Clade) Sereno 1986	Ref: M.J. Benton, 1990: fig. 1.5. [inferred rank]

Historical positions

†Euornithopoda (Clade) Sereno 1986	Ref: M.J. Benton, 2005: 398. [implicit]
†Ornithopoda (Suborder) Marsh, 1871	Ref: D. Lambert & the Diagram Group, 1991(1997): 109, 155.
†Ornithopoda (Suborder) Marsh, 1871	Ref: P. Uetz, [1995-]1996: 30 Dec 1996.
†Ornithopoda (Order) Marsh, 1881	Ref: G. Olshevsky, 1991: 168.
†Styracosterna (Clade) Sereno 1986	Ref: M.J. Benton, 1990: fig. 1.5.
†Ornithopoda (Suborder) Marsh, 1871	Ref: B. Gardiner et al., 1989: 302.
†Ornithopoda (Suborder) Marsh, 1871	Ref: R.L. Carroll, 1988: App. (p. 622).
†Ornithopoda (Suborder) Marsh, 1871	Ref: B. Grzimek et al., 1973 (1971): 596.

Number of Subtaxa

2026	Available in Systema Naturae 2000	†5g;3s
1989-present	Systema Naturae 2000	[; †5g]
1991(1997)	D. Lambert & the Diagram Group: 155	[; †[<]6g]
1991(1997)	D. Lambert & the Diagram Group: 155	[; †[<]6g]
1991	G. Olshevsky: 168	†7(4)[9]g;21(12)s
1988	R.L. Carroll: App. (p. 622)	[; †10g]