Hemiphractus helioi Sheil and Mendelson, 2001

Class: Amphibia > Order: Anura > Family: Hemiphractidae > Genus: Hemiphractus > Species: Hemiphractus helioi

Hemiphractus helioi Sheil and Mendelson, 2001, Herpetologica, 57: 190. Holotype: KU 163304, by original designation. Type locality: "Peru: Cuzco: Rio Cosñipata, 4 km SW Santa Isabel, 1700 m . . . . 13° 05′ S, 71° 18′ W".

Common Names

Helio's Casque-headed Frog (Coloma and Duellman, 2025, Amph. Ecuador. Vol. 4: xxx). 

Rana de Casco de Helio (Spanish: Coloma and Duellman, 2025, Amph. Ecuador. Vol. 4: xxx).

Cusco Triangular-headed Frog (Villacampa-Ortega, Serrano-Rojas, and Whitworth, 2017, Amph. Manu Learning Cent.: 122).

Distribution

Upper Amazon Basin and lower Amazonian slopes of the Andes from Ecuador (464 to 929 m elevation) to southern Peru and into adjacent Brazil (Acre).  

Geographic Occurrence

Natural Resident: Brazil, Ecuador, Peru

Comment

Confused previously with Hemiphractus johnsoni according to the original publication. J. Köhler suggests (in litt.) that the record for northern Bolivia by Sheil and Mendelson, 2001, Herpetologica, 57: 190, is in error. Bernarde, Miranda, Albuquerque, and Turci, 2010, Check List, 6: 491-492, provided a record for Brazil and discussed the range. See brief account for the Manu region, Peru, by Villacampa-Ortega, Serrano-Rojas, and Whitworth, 2017, Amph. Manu Learning Cent.: 122–123. Records from Colombia appear to apply to Hemiphractus johnsoniMetcalf, Marsh, Torres Pacaya, Graham, and Gunnels, 2020, Herpetol. Notes, 13: 753–767, reported the species from the Santa Cruz Forest Reserve, Loreto, northeastern Peru. Crnobrna, Santa-Cruz Farfan, Gallegos, López-Rojas, Llanqui, Panduro Pisco, and Kelsen Arbaiza, 2023, Check List, 19: 441, provided a record from Ucayali Department, central-eastern Peru. Coloma and Duellman, 2025, Amph. Ecuador. Vol. 4: 168–169, provided an account, with photographs, which summarized identification, adult morphology, systematics, natural history, distribution (including a dot map for Ecuador), and conservation.  

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