Gastrophryne mazatlanensis (Taylor, 1943)

Class: Amphibia > Order: Anura > Family: Microhylidae > Subfamily: Gastrophryninae > Genus: Gastrophryne > Species: Gastrophryne mazatlanensis

Microhyla mazatlanensis Taylor, 1943, Univ. Kansas Sci. Bull., 29: 355. Holotype: EHT-HMS 1236, by original designation; now FMNH 100040 according to Marx, 1976, Fieldiana, Zool., 69: 59. Type locality: "two miles east of Mazatlán, Sinaloa", Mexico.

Microhyla carolinensis mazatlanensisHecht and Matalas, 1946, Am. Mus. Novit., 1315: 5–7; Carvalho, 1954, Occas. Pap. Mus. Zool. Univ. Michigan, 555: 13.

Microhyla olivacea mazatlanensisLangebartel and Smith, 1954, Herpetologica, 10: 126.

Gastrophryne olivacea mazatlanensisChrapliwy, Williams, and Smith, 1961, Herpetologica, 17: 89.

Gastrophryne mazatlanensisStreicher, Cox, Campbell, Smith, and de Sá, 2012, Mol. Phylogenet. Evol., 64: 645–653.

English Names

Sinaloa Narrow-mouthed Toad (Schmidt, 1953, Check List N. Am. Amph. Rept., Ed. 6: 77; Conant, Cagle, Goin, Lowe, Neill, Netting, Schmidt, Shaw, Stebbins, and Bogert, 1956, Copeia, 1956: 176; Stebbins, 1966, Field Guide W. North Am. Rept. Amph.: 78).

Sinaloan Narrow-mouthed Toad (Stebbins, 1985, Field Guide W. Rept. Amph., Ed. 2: 95; Frost, Lemmon, McDiarmid, and Mendelson, 2017, in Crother (ed.), Herpetol. Circ., 43: 11).

Mazatlan Narrowmouth Toad (Liner, 1994, Herpetol. Circ., 23: 22; Liner and Casas-Andreu, 2008, Herpetol. Circ., 38: 14).


South-central Arizona and southwestern New Mexico (USA) to Nayarit (Mexico) along the coastal plain.

Geographic Occurrence

Natural Resident: Mexico, United States of America, United States of America - Arizona, United States of America - New Mexico


Removed from the synonym of Gastrophryne olivacea by Streicher, Cox, Campbell, Smith, and de Sá, 2012, Mol. Phylogenet. Evol., 64: 645–653, where it had been placed by Hecht and Matalas, 1946, Am. Mus. Novit., 1315: 5–7, although Stebbins, 1985, Field Guide W. Rept. Amph., Ed. 2: 95, treated it as a distinct subspecies of Gastrophryne olivacea. See comment under Gastrophryne olivaceaRorabaugh and Lemos-Espinal, 2016, Field Guide Amph. Rept. Sonora: 173–175, provided a detailed account of natural history, morphology, distribution, and conservation status in Sonora, Mexico. 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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