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Taxon: Genus †Troodon Leidy, 1856, nom. dub. (dinosaur)
 Entity: 

Concise hierarchy

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

Included, by definition, in node-based clade

†Deinonychosauria (Clade) Colbert & Russell 1969 [Padian 1997] Ref: P.C. Sereno, 1998: table 4 (p. 65).

Included, by definition, in branch-based clade

†Troodontidae (Clade) Gilmore 1924 [Varricchio 1997] Ref: D.J. Varricchio, 1997: 749.
†Troodontidae (Clade) Gilmore 1924 [Varricchio 1997] Ref: P.C. Sereno, 1998: table 4 (p. 65).

Excluded, by definition, from branch-based clade

†Dromaeosauridae (Clade) Ostrom 1969 [Sereno 1998] Ref: P.C. Sereno, 1998: table 4 (p. 65).
†Ornithomimosauria (Clade) Barsbold 1976 [Osmólska 1997] Ref: C. Hendrickx et al., 2015: table (p. 69) (Osmólska, 1997).

Current position

†Troodontidae (Family) Gilmore, 1924 Ref: D. Lambert & the Diagram Group, 1991(1997): 127.

Alternative positions

†Saurornithoididae (Family) Barsbold, 1974 Ref: R.L. Carroll, 1988: App. (p. 621).
†Troodontidae (Clade) Gilmore 1924 [Varricchio 1997] Ref: C. Hendrickx et al., 2015: 13 (fig. 5).

Historical positions

†Troodontidae (Clade) Gilmore 1924 [Varricchio 1997] Ref: C. Hendrickx et al., 2015: 13 (fig. 5).
†Troodontidae (Clade) Gilmore 1924 [Varricchio 1997] Ref: P.J. Makovicky & M.A. Norell, 2004: table 9.1 (p. [185]).
†Troodontidae (Family) Gilmore, 1924 Ref: D. Lambert & the Diagram Group, 1991(1997): 127.
†Troodontidae (Family) Gilmore, 1924 Ref: G. Olshevsky, 1991: 125.
†Saurornithoididae (Family) Barsbold, 1974 Ref: R.L. Carroll, 1988: App. (p. 621).
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Last updated: 28 Aug 2026