Search tool	Example of search string in box	What that means to the database
* = "wildcard". Allows a partial letter string to be entered and implies either no or various extension on this letter string	Hyl*	Will find all uses of "Hyl . . ." anywhere in a record: e.g., Hylarana, Hyla, Hylidae, Hylinae, Hylaedactyla.
* = "wildcard". Allows a partial letter string to be entered and implies either no or various extension on this letter string	*Hyla	Will find all uses of ". . . hyla" anywhere in a record: e.g., Hyla, Hylidae, Plectrohyla, Ptychadena hylaea, Adenomera hylaedactyla
	Hyla	Will find all records that contain stand-alone uses of Hyla: e.g., Hyla, Hyla arenicolor
Strings of words without quotation marks	Lithobates pipiens	Interprets this as "Lithobates OR pipiens" so will find the union of all records that contain either "Lithobates" or "pipiens": e.g., Lithobates omiltemanus, Hylorana pipiens
Strings of word with quotation marks	"Lithobates pipiens"	Interprets this as "Lithobates AND pipiens" so will return all records that have the character string "Lithobates pipiens" anywhere within a record: e.g., all members of the Lithobates pipiens complex.
AND statement. Means that the results of the search must include both words held together by an AND	Lithobates AND pipiens	Same as "Lithobates pipiens"
OR statement. Means that the results of the search will all records that have either of the terms held together by an OR	Lithobates OR "Costa Rica"	Recovers all records that contain the word "Lithobates" or "Costa Rica": 402 records inasmuch as this will include all records for the entire amphibian fauna of Costa Rica
Combining Boolean operators within the Basic Search box (AND, OR, NOT, quotation marks)	Lithobates AND "Costa Rica" NOT forreri	Recovers only records that contain the word Lithobates AND "Costa Rica", but excludes any record that contains the word "forreri" in any part of the record: 9 records
Printable HELP file

Search tool	Example of search string in box	What that means to the database
* = "wildcard". Allows a partial letter string to be entered and implies either no or various extension on this letter string	Hyl*	Will find all uses of "Hyl . . ." anywhere in a record: e.g., Hylarana, Hyla, Hylidae, Hylinae, Hylaedactyla.
* = "wildcard". Allows a partial letter string to be entered and implies either no or various extension on this letter string	*Hyla	Will find all uses of ". . . hyla" anywhere in a record: e.g., Hyla, Hylidae, Plectrohyla, Ptychadena hylaea, Adenomera hylaedactyla
Single word	Hyla	Will find all records that contain stand-alone uses of Hyla: e.g., Hyla, Hyla arenicolor
Strings of words without quotation marks	Lithobates pipiens	Interprets this as "Lithobates OR pipiens" so will find the union of all records that contain either "Lithobates" or "pipiens": e.g., Lithobates omiltemanus, Hylorana pipiens
Strings of word with quotation marks	"Lithobates pipiens"	Interprets this as "Lithobates AND pipiens" so will return all records that have the character string "Lithobates pipiens" anywhere within a record: e.g., all members of the Lithobates pipiens complex.
AND statement. Means that the results of the search must include both words held together by an AND	Lithobates AND pipiens	Same as "Lithobates pipiens"
OR statement. Means that the results of the search will all records that have either of the terms held together by an OR	Lithobates OR "Costa Rica"	Recovers all records that contain the word "Lithobates" or "Costa Rica": 402 records inasmuch as this will include all records for the entire amphibian fauna of Costa Rica
Combining Boolean operators within the Basic Search box (AND, OR, NOT, quotation marks)	Lithobates AND "Costa Rica" NOT forreri	Recovers only records that contain the word Lithobates AND "Costa Rica", but excludes any record that contains the word "forreri" in any part of the record: 9 records
Printable HELP file

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 unicolor — Nieden, 1923, Das Tierreich, 46: 419.

Eleutherodactylus unicolor — Schmidt, 1928, New York Acad. Sci. Scient. Surv., 10: 66.

Eleutherodactylus (Eleutherodactylus) unicolor — Hedges, 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) unicolor — Lynch and Duellman, 1997, Univ. Kansas Mus. Nat. Hist. Spec. Publ., 23: 234.

Euhyas unicolor — Frost, 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).

Distribution

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

Comment

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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For additional information see AmphibiaWeb report
For information on conservation status and distribution see the IUCN Redlist
For information on distribution, habitat, and conservation see the Map of Life
For related information on conservation and images as well as observation see iNaturalist
For access to available specimen data for this species, from over 350 scientific collections, go to Vertnet.