Pristimantis quinquagesimus (Lynch and Trueb, 1980)

Class: Amphibia > Order: Anura > Superfamily: Brachycephaloidea > Family: Strabomantidae > Subfamily: Pristimantinae > Genus: Pristimantis > Species: Pristimantis quinquagesimus

Eleutherodactylus quinquagesimus Lynch and Trueb, 1980, Copeia, 1980: 392. Holotype: KU 167859, by original designation. Type locality: "Quebrada Zapadores, 5 km ESE Chiriboga, 2010 m, Provincia Pichincha, Ecuador (latitude 00° 17′ S, longitude 78° 46′ W)".

Eleutherodactylus (Eleutherodactylus) quinquagesimusLynch, 1996, in Powell and Henderson (eds.), Contr. W. Indian Herpetol.: 154; Lynch and Duellman, 1997, Univ. Kansas Mus. Nat. Hist. Spec. Publ., 23: 231.

Pristimantis quinquagesimusHeinicke, Duellman, and Hedges, 2007, Proc. Natl. Acad. Sci. USA, Suppl. Inform., 104: Table 2.

Pristimantis (Pristimantis) quinquagesimusHedges, Duellman, and Heinicke, 2008, Zootaxa, 1737: 121.

English Names

Zapadores Robber Frog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 78).

Fiftyish Rainfrog (Arteaga-Navarro, Bustamante, and Guayasamin, 2013, Amph. Rept. Mindo: 84). 


Cloud forests (1920 to 2806 m elevation) on the Pacific slopes of the western Andes in northwestern Ecuador and extreme southern Colombia.

Geographic Occurrence

Natural Resident: Colombia, Ecuador


In the Eleutherodactylus crucifer assembly of the Eleutherodactylus unistrigatus group and most closely allied with Eleutherodactylus calcaratus, Eleutherodactylus chloronotus, Eleutherodactylus crucifer, and Eleutherodactylus inusitatus, according to the original publication, and Eleutherodactylus tenebrionis, according to Lynch and Miyata, 1980, Breviora, 457: 8. See Lynch and Burrowes, 1990, Occas. Pap. Mus. Nat. Hist. Univ. Kansas, 136: 7. See account by Lynch and Duellman, 1997, Univ. Kansas Mus. Nat. Hist. Spec. Publ., 23: 127-129, who place it in the Eleutherodactylus (Eleutherodactylus) devillei group. In the Pristimantis (Pristimantis) devillei species group of Hedges, Duellman, and Heinicke, 2008, Zootaxa, 1737: 121. In the reformulated Pristimantis devillei species group of Padial, Grant, and Frost, 2014, Zootaxa, 3825: 126. See photograph, map, description of geographic range and habitat, and conservation status (as Eleutherodactylus quinquagesimus) in Stuart, Hoffmann, Chanson, Cox, Berridge, Ramani, and Young, 2008, Threatened Amph. World: 372. Arteaga-Navarro, Bustamante, and Guayasamin, 2013, Amph. Rept. Mindo: 84–85, provided an account and dot map for Ecuador. Proaño, Proaño-Morales, and Guayasamin, 2022, Ecosistemas, 31 (2: 2137): 1–9, reported a collection from the Sierra de Toisán, Imbabura, Ecuador, and provided a new maximum elevation record. 

External links:

Please note: these links will take you to external websites not affiliated with the American Museum of Natural History. We are not responsible for their content.