Ceratophrys stolzmanni Steindachner, 1882

Class: Amphibia > Order: Anura > Family: Ceratophryidae > Genus: Ceratophrys > Species: Ceratophrys stolzmanni

Ceratophrys Stolzmanni Steindachner, 1882, Sitzungsber. Akad. Wiss. Wien, Phys. Math. Naturwiss. Kl., 85: 188. Syntypes: NHMW 4631.1–2 and 4632, according to Häupl and Tiedemann, 1978, Kat. Wiss. Samml. Naturhist. Mus. Wien, 2: 14, and Häupl, Tiedemann, and Grillitsch, 1994, Kat. Wiss. Samml. Naturhist. Mus. Wien, 9: 19. Type locality: "Tumbez" (= Tumbes, northwestern Peru.

Ceratophrys stolzmanni stolzmanniPeters, 1967, Proc. Biol. Soc. Washington, 80: 109.

Ceratophrys stolzmanni scaphiopeza Peters, 1967, Proc. Biol. Soc. Washington, 80: 105. Holotype: USNM 160970, by original designation. Type locality: "Cuatro Hermanitos, an experimental farm approximately 4 km WNW of Guayaquil, Guayas Province, Ecaudor, atltitude approximately 50 m".

Ceratophrys (Stombus) stolzmanniLynch, 1982, Syst. Zool., 31: 166–179.

English Names

Escuerzo (Cochran, 1961, Living Amph. World: 89).

Stolzmann's Horned Frog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 71).


Seasonally dry environments in northwestern Peru (Departamento Tumbes) and the Gulf of Guayaquil (Manabí, Santa Elena, Guayas, Loja, and El Oro Provinces), Ecuador, 0–380 m elevation.

Geographic Occurrence

Natural Resident: Ecuador, Peru


See photograph, map, description of geographic range and habitat, and conservation status in Stuart, Hoffmann, Chanson, Cox, Berridge, Ramani, and Young, 2008, Threatened Amph. World: 297. Faivovich, Nicoli, Blotto, Pereyra, Baldo, Barrionuevo, Fabrezi, Wild, and Haddad, 2014, S. Am. J. Herpetol., 9: 207–227, suggested that this species is the sister taxon of Ceratophrys calcarata + Ceratophrys cornuta. Cuadrado, Loor, and Narváez, 2020, Check List, 16: 665–674, provided a locality at Engabao, Playas Canton, Guayas Province, Ecuador. Armijos-Ojeda, Székely, Székely, Cogǎlniceanu, Cisneros-Heredia, Ordóñez-Delgado, Escudero, and Espinosa, 2021, ZooKeys, 1063: 30, discussed the range and added several new localities in Ecuador. 

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