Incilius mazatlanensis (Taylor, 1940)

Class: Amphibia > Order: Anura > Family: Bufonidae > Genus: Incilius > Species: Incilius mazatlanensis

Bufo mazatlanensis Taylor, 1940 "1939", Univ. Kansas Sci. Bull., 26: 492. Holotype: EHT-HMS 374, by original designation; now FMNH 100027 according to Marx, 1976, Fieldiana, Zool., 69: 45. Type locality: "two miles east of Mazatlán, Sinaloa, Mexico".

Bufo nayaritensis Taylor, 1943, Univ. Kansas Sci. Bull., 29: 349. Holotype: EHT-HMS 397, by original designation; now FMNH 100043, according to Marx, 1976, Fieldiana, Zool., 69: 45. Type locality: "Tepic, Nayarit", Mexico. Synonymy by Langebartel and Smith, 1954, Herpetologica, 10: 126.

Bufo mazatlanensis mazatlanensisLangebartel and Smith, 1954, Herpetologica, 10: 126.

Bufo mazatlanensis nayaritensisLangebartel and Smith, 1954, Herpetologica, 10: 126.

Cranopsis mazatlanensisFrost, Grant, Faivovich, Bain, Haas, Haddad, de Sá, Channing, Wilkinson, Donnellan, Raxworthy, Campbell, Blotto, Moler, Drewes, Nussbaum, Lynch, Green, and Wheeler, 2006, Bull. Am. Mus. Nat. Hist., 297: 364.

Ollotis mazatlanensisFrost, Grant, and Mendelson, 2006, Copeia, 2006: 558, by implication.

Incilius mazatlanensisFrost, Mendelson, and Pramuk, 2009, Copeia, 2009: 418–419, by implication.

English Names

Sinaloa Toad (Liner, 1994, Herpetol. Circ., 23: 17; Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 42; Liner and Casas-Andreu, 2008, Herpetol. Circ., 38: 18).


Northern Sonora from the municipality of Imuris and southwestern Chihuahua (Río Fuerte drainage) to Colima, along the Pacific coastal plain, Mexico; reported in the Pacific drainage of Durango and Jalisco, Mexico; Isla Maria Madre, Nayarit, Mexico. 

Geographic Occurrence

Natural Resident: Mexico

Endemic: Mexico


In the former Bufo valliceps group of Martin, 1972, in Blair (ed.), Evol. Genus Bufo: 49. See accounts by Porter, 1964 "1963", Herpetologica, 19: 229–247, and McDiarmid and Hardy, 1969, Univ. Kansas Publ. Mus. Nat. Hist., 18: 82–84. See comment under Incilius gemmifer. Mendelson, Mulcahy, Williams, and Sites, 2011, Zootaxa, 3138: 1–34, suggested that this species is a member of a monophyletic Incilius valliceps group and in a subgroup they referred to as the Lowland group (the name Incilius valliceps subgroup is available—DRF) that includes Incilius gemmifer, Incilius luetkeni, Incilius mazatlanensis, Incilius nebulifer, and Incilius vallicepsLemos-Espinal, 2007, Anf. Rept. Chihuahua Mexico: 38, provided an account (as Bufo mazatlanensis) for Chihuahua, Mexico. Oliver-López, Woolrich-Piña, and Lemos-Espinal, 2009, Fam. Bufonidae Mex.: 80–82, provided an account for the state of Mexico (as Ollotis mazatlanensis), although the range map for the northern portion of the range is misleading. Valdes-Lares, Martín-Muñoz de Cote, and Muñiz-Martínez, 2013, Herpetol. Rev., 44: 646, provided new records for Durango, Mexico. Rorabaugh and Lemos-Espinal, 2016, Field Guide Amph. Rept. Sonora: 138–141, provided a detailed account of natural history, morphology, and conservation status in Sonora, Mexico. Lemos-Espinal, Smith, and Valdes-Lares, 2019, Amph. Rept. Durango: 53–54, provided a brief account for Durango, Mexico. Rorabaugh and Verdugo Figueroa, 2019, Herpetol. Rev., 50: 322, provided a record from the municipality of Imuris, northern Sonora, Mexico, and briefly discussed the range. Ahumada-Carrillo, Grünwald, López Cuellar, and Jones, 2020, Herpetol. Rev., 51: 277–278, reported the species from the municipality of Mezquitic, northern Jalisco, Mexico. Found on Isla Maria Madre in the Tres Marias Archipelago of Nayarit, Mexico, according to Nolasco Luna, Barraza-Soltero, López-Montes, Moreno-López, and Escobedo Galván, 2022, Check List, 18: 244. Loc-Barragán, Smith, Woolrich-Piña, and Lemos-Espinal, 2024, Herpetozoa, Wien, 37: 30, reported on the distributional and conservation status in the state of Nayarit, Mexico.  

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