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Taxon: †Ornithopoda Marsh 1881 (dinosaur)
 Entity: 

Concise hierarchy

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

Phylogeny

Node-based clade Ref: P.C. Sereno, 1998: table 4 (p. 61).

Defined by the most recent common ancestor (and all its descendants) of

†Heterodontosaurus (Genus) Crompton & Charig, 1962 Ref: P.C. Sereno, 1998: table 4 (p. 61).
†Parasaurolophus (Genus) Parks, 1922 Ref: P.C. Sereno, 1998: table 4 (p. 61).

Current position

†Cerapoda ([unranked]) Sereno, 1986 Ref: M.J. Benton, 1990: fig. 1.5.

Alternative positions

†Neornithischia (Clade) Cooper 1985 Ref: P.C. Sereno, 1998: table 4 (p. 61).

Historical positions

†Neornithischia (Clade) Cooper 1985 Ref: P.C. Sereno, 1998: 66, table 4 (p. 61), figs. 4, 5B.
†Cerapoda ([unranked]) Sereno, 1986 Ref: M.J. Benton, 1990: fig. 1.5.
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Last updated: 28 Aug 2026