Pristimantis orcus Lehr, Catenazzi, and Rodríguez, 2009, Zootaxa, 1990: 31. Holotype: MUSM 27435, by original designation. Type locality: "Comunidad de Nueva Vida (3° 37´ 57.2 S, 75° 20´ 48.9 W) at 158 m elevation, Distrito de Trompeteros, Provincia de Loreto, Región Loreto, Peru".
None noted.
Known only from three localities in Loreto and one in San Martin in the northeastern one third of Amazonian Peru; likely to be found in Ecuador and Colombia.
In the Pristimantis (Pristimantis) unistrigatus group, most similar to Pristimantis altamazonicus, Pristimantis diadematus, Pristimantis eurydactylus, and Pristimantis ventrimarmoratus according to the original publication. See Duellman and Lehr, 2009, Terrest.-breeding Frogs in Peru: 372-373, for brief account.
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