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Monotypic taxon: Genus †Pachycephalosaurus Brown & Schlaikjer, 1943 (dinosaur)
 Entity: 

Concise hierarchy

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

Included, by definition, in node-based clade

Marginocephalia (Clade) Sereno 1986 Ref: P.C. Sereno, 1998: table 4 (p. 62).
Pachycephalosauridae (Clade) Sternberg 1945 Ref: P.C. Sereno, 1998: table 4 (p. 62).

Included, by definition, in branch-based clade

Pachycephalosauria (Clade) Maryañska & Osmólska 1974 Ref: P.C. Sereno, 1998: table 4 (p. 62).
Pachycephalosaurinae (Clade) Sereno 1998 Ref: P.C. Sereno, 1998: table 4 (p. 62).

Excluded, by definition, from branch-based clade

Ceratopsia (Clade) Marsh 1890 Ref: P.C. Sereno, 1998: table 4 (p. 62).
Stegoceras (Genus) Lambe, 1902 Ref: P.C. Sereno, 1998: table 4 (p. 62).

Subsequent positions

Domocephalinae (Subfamily) Sereno, 1986, nom. inval. Ref: P. Sereno, 1986: 252.

Current position

Pachycephalosaurini (Tribe) Sullivan, 2003 Ref: R.M. Sullivan, 2006: 357.

Alternative positions

Domocephalinae (Subfamily) Sereno, 1986, nom. inval. Ref: P. Sereno, 1986: 252. [new position]
Pachycephalosauridae (Family) Sternberg, 1945 Ref: D. Lambert & the Diagram Group, 1991(1997): 161.
Pachycephalosaurinae (Clade) Sereno 1998 Ref: P.C. Sereno, 1998: 68 (fig. 6).

Historical positions

Pachycephalosaurini (Tribe) Sullivan, 2003 Ref: R.M. Sullivan, 2006: 357.
Pachycephalosaurinae (Clade) Sereno 1998 Ref: P.C. Sereno, 1998: 68 (fig. 6).
Domocephalinae (Subfamily) Sereno, 1986, nom. inval. Ref: P. Sereno, 1986: 252. [new position]

Number of Subtaxa

2024 Available in Systema Naturae 2000 †1s
1989-present Systema Naturae 2000 †1s
2006 R.M. Sullivan: 357 †1s
©2004-2024 Universal Taxonomic Services
Last updated: 1 Feb 2024