Hyloxalus elachyhistus (Edwards, 1971)

Class: Amphibia > Order: Anura > Superfamily: Dendrobatoidea > Family: Dendrobatidae > Subfamily: Hyloxalinae > Genus: Hyloxalus > Species: Hyloxalus elachyhistus

Colostethus elachyhistus Edwards, 1971, Proc. Biol. Soc. Washington, 84: 149. Holotype: KU 120540, by original designation. Type locality: "Loja, Loja Province, Ecuador, 2150 m". See comment regarding type locality by Rivero and Almendáriz C., 1992 "1991", Rev. Politécnica, Quito, 16: 117.

Hyloxalus elachyhistusGrant, Frost, Caldwell, Gagliardo, Haddad, Kok, Means, Noonan, Schargel, and Wheeler, 2006, Bull. Am. Mus. Nat. Hist., 299: 168.

English Names

Loja Rocket Frog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 48).


Pacific slopes of the Andes in southern Ecuador (850–2760 m); Amazonian slopes of the Andes in southern Ecuador and in northern Peru in the Huancabamba Depression (1800–2000 m) and south to Cajabamba, Cajamarca.

Geographic Occurrence

Natural Resident: Ecuador, Peru


See account on Peruvian specimens by Duellman and Wild, 1993, Occas. Pap. Mus. Nat. Hist. Univ. Kansas, 157: 1–53. See account by Coloma, 1995, Misc. Publ. Mus. Nat. Hist. Univ. Kansas, 87: 28–29, who noted that Hyloxalus elachyhistus, Hyloxalus infraguttatus, and Hyloxalus vertebralis might prove to intergrade. Duellman, 2004, Sci. Pap. Nat. Hist. Mus. Univ. Kansas, 35: 18–21, provided an account. See photograph, map, description of geographic range and habitat, and conservation status (as Colostethus elachyhistus) in Stuart, Hoffmann, Chanson, Cox, Berridge, Ramani, and Young, 2008, Threatened Amph. World: 222. Koch, Rödder, and Venegas, 2011, Salamandra, 47: 116–119, reported on the advertisement call. Armijos-Ojeda, Székely, Székely, Cogǎlniceanu, Cisneros-Heredia, Ordóñez-Delgado, Escudero, and Espinosa, 2021, ZooKeys, 1063: 37, provided a dot map for western Ecuador and northwestern Peru. 

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