Pristimantis librarius (Flores & Vigle, 1994)

Camper, Jeffrey D., Torres-Carvajal, Omar, Ron, Santiago R., Nilsson, Jonas, Arteaga, Alejandro, Knowles, Travis W. & Arbogast, Brian S., 2021, Amphibians and reptiles of Wildsumaco Wildlife Sanctuary, Napo Province, Ecuador, Check List 17 (3), pp. 729-751 : 737-738

Pristimantis librarius ( Flores & Vigle, 1994)

Material examined. ECUADOR • 1 adult; Napo Prov- ince, WWS, Piha Trail bottom; 00.6897°S, 077.5979°W; 1312 m a.s.l.; 8 Aug. 2019; QCAZ 76438 .

Identification. This small, brown frog can be recognized by having an orange to red groin, a tubercle on the eyelid, expanded finger discs, an exposed tympanum, and no scapular folds. It also lacks basal membranes between the toes, as well as heel tubercles, and the backs of the thighs are unmarked and medium brown. Males reach 18.5 mm SVL and females 30.7 mm SVL ( Ron et al. 2019).

Pristimantis prolatus ( Lynch & Duellman, 1980) Material examined. ECUADOR • 1 adult; Napo Prov- ince, WWS; 00.6888°S, 077.6030°W; 1406 m a.s.l.; 9 July 2010; QCAZ 48896 • 1 adult; Napo Province, WWS; 00.6779°S, 077.6030°W; 1440 m a.s.l.; 12 July 2010; QCAZ 48902 • 1 adult; Napo Province, WWS, Piha Trail about 20 m down slope of junction with the Mannakin

Trail ; 00.6893°S, 077.5995°W; 1400 m a.s.l.; 30 July 2010; QCAZ 48944 • 2 adults; Napo Province, WWS; 00.6759°S, 077.5998°W; 1485 m a.s.l.; 19 Apr. 2014; MZUTI 3530 and 3533 .

Identification. This small, brown frog’s most distinctive character is the H-shaped dermal ridges on the scapular region of the back. It has tuberculate skin, with conical tubercles on the eyelid, heel, and several on the tarsi. The back of the thigh is uniformly dark brown, with no mark- ings. The finger discs are expanded, and there is no basal membrane between the toes. Males reach a maximum SVL of 18.4 mm and females 24.1 mm ( Ron et al. 2019).

Habitat. This species was found in secondary forest and in a clearing within secondary forest.

Remarks. This species is listed as endangered by both the IUCN and Ecuadorean Red Lists ( Ron et al. 2019).