Triprion petasatus (Cope, 1865)

Class: Amphibia > Order: Anura > Family: Hylidae > Subfamily: Hylinae > Genus: Triprion > Species: Triprion petasatus

Pharyngodon petasatus Cope, 1865, Proc. Acad. Nat. Sci. Philadelphia, 17: 193. Holotype: USNM 12287 according to Kellogg, 1932, Bull. U.S. Natl. Mus., 160: 139; Cochran, 1961, Bull. U.S. Natl. Mus., 220: 68. Type locality: "vicinity of Mérida, Yucatan . . . . from a hole in the rocky wall of the Cenote Tamaché, [17 km north of Mérida, Yucatán, Mexico], on the new road to Progreso". Restricted, apparently in error, to "Chichen Itzá", Yucatán, Mexico, by Smith and Taylor, 1950, Univ. Kansas Sci. Bull., 33: 351.

Triprion petasatusCope, 1866, Proc. Acad. Nat. Sci. Philadelphia, 18: 127.

Hyla petasataWiens, Fetzner, Parkinson, and Reeder, 2005, Syst. Biol., 54: 25, by implication.

English Names

Yucatecan Casquehead Treefrog (Liner, 1994, Herpetol. Circ., 23: 29; Lee, 2000, Field Guide Amph. Rept. Maya World: 116).

Yucatecan Shovel-headed Treefrog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 65).

Yucatán Casque-headed Treefrog (Lee, 1996, Amph. Rept. Yucatan Peninsula: 112).

Yucatán Casqueheaded Treefrog (Campbell, 1998, Amph. Rept. N. Guatemala Yucatan Belize: 89).

Yucatecan Casque-headed Treefrogs (Liner and Casas-Andreu, 2008, Herpetol. Circ., 38: 26).


Widely distributed in the Yucatan Peninsula, Mexico, through Belize, and throughout El Petén, Guatemala; isolated records in northwestern and northern Honduras.

Geographic Occurrence

Natural Resident: Belize, Guatemala, Honduras, Mexico


See accounts by Duellman, 1970, Monogr. Mus. Nat. Hist. Univ. Kansas: 637–641, Lee, 1996, Amph. Rept. Yucatan Peninsula: 112–114, Campbell, 1998, Amph. Rept. N. Guatemala Yucatan Belize: 89–90, Lee, 2000, Field Guide Amph. Rept. Maya World: 116–118, Duellman, 2001, Hylid Frogs Middle Am., Ed. 2: 999, and McCranie and Wilson, 2002, Amph. Honduras: 344–346. McCranie, 2007, Herpetol. Rev., 38: 39, detailed the departmental distribution in Honduras. Köhler, 2011, Amph. Cent. Am.: 272, provided a brief summary of natural history and provided a range map and photograph for this species.  McCranie, 2015, Zootaxa, 3931: 381, doubted the Honduran record. Blotto, Pereyra, Grant, and Faivovich, 2020, Bull. Am. Mus. Nat. Hist., 443: 1-23, described the hand and foot musculature. Antúnez-Fonseca, Ordoñez-Mazier, López, Velásquez, Ramos, García de Almeida, and Turcios-Casco, 2023, Herpetol. Notes, 16: 65–69, provided a record from the Aguán Valley of Yoro, Honduras, provided a dot map of the species, and reported on life history observations. 

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