Eleutherodactylus unicolor Stejneger, 1904

Class: Amphibia > Order: Anura > Superfamily: Brachycephaloidea > Family: Eleutherodactylidae > Subfamily: Eleutherodactylinae > Genus: Eleutherodactylus > Species: Eleutherodactylus unicolor

Eleutherodactylus unicolor Stejneger, 1904, Annu. Rep. U.S. Natl. Mus. for 1902: 597. Holotype: USNM 26963. Type locality: "Camp El Yunque Mountain, 2,978 feet altitude", Bosque Experimental de Luquillo, Puerto Rico. Junior secondary homonym of Cornufer unicolor Tschudi, 1838. Placed on Official List of Specific Names in Zoology by Opinion 1104, Anonymous, 1978, Bull. Zool. Nomencl., 34: 222–223.

Hylodes unicolorNieden, 1923, Das Tierreich, 46: 419.

Eleutherodactylus unicolorSchmidt, 1928, New York Acad. Sci. Scient. Surv., 10: 66.

Eleutherodactylus (Eleutherodactylus) unicolorHedges, 1989, in Woods (ed.), Biogeograph. W. Indies: 327; Heinicke, Duellman, and Hedges, 2007, Proc. Natl. Acad. Sci. USA, 104: 10094; Heinicke, Duellman, and Hedges, 2007, Proc. Natl. Acad. Sci. USA, Suppl. Inform., 104: Table 2.

Eleutherodactylus (Euhyas) unicolorLynch and Duellman, 1997, Univ. Kansas Mus. Nat. Hist. Spec. Publ., 23: 234.

Euhyas unicolorFrost, Grant, Faivovich, Bain, Haas, Haddad, de Sá, Channing, Wilkinson, Donnellan, Raxworthy, Campbell, Blotto, Moler, Drewes, Nussbaum, Lynch, Green, and Wheeler, 2006, Bull. Am. Mus. Nat. Hist., 297: 361.

English Names

Dull Robber Frog (Frank and Ramus, 1995, Compl. Guide Scient. Common Names Amph. Rept. World: 80).

Puerto Rican Elfin Frog (Hedges, Powell, Henderson, Hanson, and Murphy, 2019, Caribb. Herpetol., 67: 12).


Known only from the upper elevations of El Yunque, eastern Puerto Rico, 660–1039 m elevation.

Geographic Occurrence

Natural Resident: Puerto Rico

Endemic: Puerto Rico


Placed in the Eleutherodactylus unicolor group by Joglar, 1983, Caribb. J. Sci., 19: 37. In the Eleutherodactylus auriculatus section, Eleutherodactylus martinicensis series, unassigned to species group, according to Hedges, 1989, in Woods (ed.), Biogeograph. W. Indies: 327. In Eleutherodactylus (Euhyas), unassigned to species group according to Lynch and Duellman, 1997, Univ. Kansas Mus. Nat. Hist. Spec. Publ., 23: 233. In the Eleutherodactylus (Eleutherodactylus) richmondi species series of Hedges, Duellman, and Heinicke, 2008, Zootaxa, 1737: 61, and of Padial, Grant, and Frost, 2014, Zootaxa, 3825: 129. 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: 387. Henderson and Powell, 2009, Nat. Hist. Rept. Amph. W. Indies: 80, summarized the natural history literature.

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