Anaxyrus cognatus

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Anaxyrus cognatus


Taxonavigation: Anura 

Superregnum: Eukaryota
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Cladus: Craniata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Classis: Amphibia
Subclassis: Lissamphibia
Ordo: Anura

Familia: Bufonidae
Genus: Anaxyrus
Species: Anaxyrus cognatus


Anaxyrus cognatus (Say in James, 1823)

Type locality: "3 miles west of Holly, Prowers County", Colorado, USA.

Holotype: Originally in "Philadelphia Museum".


The recognition of Anaxyrus as a genus distinct from Bufo is highly controversial, and has not been accepted by many herpetologists working with this group. For a complete phylogeny of the species in this group and their relationships as a subgroup within Bufo, see Pauly et al. (2004).


  • Bufo cognatus Say in James, 1823
  • Chilophryne cognataCope, 1862
  • Bufo lentiginosus cognatusCope, 1875
  • Bufo dipternus Cope, 1879
  • Bufo cognatus cognatusCamp, 1915


  • Say in James, 1823, Account Exped. Pittsburgh--Rocky Mts., 3: 55 (Philadelphia edition), 336 (London edition).
  • Pauly, G. B., D. M. Hillis, and D. C, Cannatella. (2004) The history of a Nearctic colonization: Molecular phylogenetics and biogeography of the Nearctic toads (Bufo). Evolution 58: 2517–2535.
  • Frost, Darrel R. 2018. Amphibian Species of the World: an Online Reference. Version 6.0. Electronic Database accessible at American Museum of Natural History, New York, USA. Anaxyrus cognatus . Accessed on 26 Mar 2008.
  • World Conservation Monitoring Centre IUCN: Anaxyrus cognatus  (Least Concern)

Vernacular names[edit]

English: Great Plains Toad