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Taxon: Species Alligator mississippiensis (Daudin, 1802) - American alligator (reptile)
 Entity: 

Concise hierarchy

(Kingdom) Animalia - (Phylum) Chordata - (Class) Reptilia - (Order) Crocodylia - (Family) Alligatoridae

Included, by definition, in node-based clade

Alligatoridae (Clade) Cuvier 1807 {Brochu 2003} Ref: C.A. Brochu, 2003: table 1 (p. 360).
Archosauromorpha (Clade) von Huene 1946 [Gauthier 2020] Ref: J.A. Gauthier, 2020: [1179].
Brevirostres (Clade) von Zittel 1890 [Brochu 2003] Ref: C.A. Brochu, 2003: table 1 (p. 360).
Crocodylia (Clade) Gmelin 1789 [Clark 1988] Ref: C.A. Brochu, 2003: table 1 (p. 360).
Eusuchia (Clade) Huxley 1875 {Brochu 2003} Ref: C.A. Brochu, 2003: table 1 (p. 360).

Included, by definition, in branch-based clade

Alligatorinae (Clade) Kälin 1940 {Brochu 2003} Ref: C.A. Brochu, 2003: table 1 (p. 360).
Alligatoroidea (Clade) Gray 1844 {Brochu 2003} Ref: C.A. Brochu, 2003: table 1 (p. 360).
Globidonta (Clade) Brochu 1999 [Brochu 1999] Ref: C.A. Brochu, 1999: 48.

Excluded, by definition, from branch-based clade

Caimaninae (Clade) Brochu 1999 Ref: C.A. Brochu, 1999: 66.
Crocodyloidea (Clade) Fitzinger 1826 {Brochu 2003} Ref: C.A. Brochu, 2003: table 1 (p. 360).
†Diplocynodontinae (Clade) Brochu 1999 [Brochu 1999] Ref: C.A. Brochu, 1999: 39.
Gavialoidea (Clade) Case 1930 [Brochu 2003] Ref: C.A. Brochu, 2003: table 1 (p. 360).
†Lagerpetidae (Clade) Arcucci 1986 [Nesbitt, Irmis, Parker, Smith, Turner & Rowe 2009] Ref: S.J. Nesbitt et al., 2009: 499.
†Planocraniidae (Clade) Li 1976 [Brochu 2012] Ref: C.A. Brochu, 2012: 524.
†Pristichampsinae (Clade) Kuhn 1968 [Brochu 2003], nom. dub. Ref: C.A. Brochu, 2003: table 1 (p. 360).
†Silesauridae (Clade) Langer et al. 2010 Ref: S.J. Nesbitt, 2011: 209 (Nesbitt et al., 2010).

Current position

Alligator (Genus) Cuvier, 1817 Ref: S.J. Nesbitt, 2011: 43; Brochu, 2012: fig. 13.

Historical positions

Alligator (Genus) Cuvier, 1817 Ref: C.A. Brochu, 2012: fig. 13.
Alligator (Genus) Cuvier, 1817 Ref: E. Puértolas et al., 2011: fig. 5.
Alligator (Genus) Cuvier, 1817 Ref: S.J. Nesbitt, 2011: 43.
Alligator (Genus) Cuvier, 1817 Ref: C.A. Brochu, 2003: fig. 1.
Alligator (Genus) Cuvier, 1817 Ref: T.I. Storer et al., 1979
Alligator (Genus) Cuvier, 1817 Ref: B. Grzimek et al., 1973 (1971): 594.
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Last updated: 21 Sep 2025