Species Description: Lehr E, Coloma LA 2008 A minute new Ecuadorian andean frog (Anura: Straboman tidae,Pristimantis). Herpetologica 64:354-367.
Pristimantis andinognomus is easily distinguished from other Pristimantis frogs by size. This is the smallest Pristimantis species and is smaller than other frogs in where they occur. It can be further distinguished by the presence of dorsolateral and postocular folds, two large conical upper eyelid tubercles, scapular, sacral, and heel tubercles, tympanic membrane and annulus, and the absence of nuptial pads (Lehr and Coloma 2008).
In life, Pristimantis andinognomus has an iris that is brown and gold with fine black reticulations. There is a dark brown interorbital bar with a gray blotch at the anterior end. The upper lip has two dark brown bars below the eyes and a dark brown stripe above the tympanum. There are two black spots in the scapular region and dark brown flecks on the scapular and sacral regions. These flecks are surrounded by a pale grey. There is a pale grey band from the upper arm to mid of the lower arm. The legs have irregularly shaped bars of dark brown with black flecks. The flank has a dark brown diagonal band. The dorsum is shagreen (Lehr and Coloma 2008).
The preserved holotype has an iris that is dark grey. The sides of the head are greyish brown. The interorbital, supra-tympanic, flank, and arm bars remain dark brown. The black spots on the scapular region also remain. The cloacal region is dark brown. The throat is slightly darker than the other ventral surfaces. Fingers I and II are tan, and the others are brown. Toes I through IV are tan, and Toe V is dark brown. The dorsum is a pale grey-brown with brown blotches (Lehr and Coloma 2008).
Individuals may have dorsolateral folds that are pale grey in color. Some individuals may have a pale grayish brown back with a pale gray stripe running down the middle, others may have three pale brown stripes running down the length of the back. The conspicuousness of the tubercles and the folds may vary (Lehr and Coloma 2008).
Distribution and Habitat
Life History, Abundance, Activity, and Special Behaviors
Pristimantis andinognomus is thought to frequent leaf litter in search of food (Lehr and Coloma 2008).
Trends and Threats
Pristimantis andinognomus forms a clade with P. colodactylus and P. caeruleonotus, two other small Pristimantis species that inhabit southern Ecuador and northern Peru (Lehr and Coloma 2008).
The specific epithet andinognomus means “Andean dwarf” (Lehr and Coloma 2008).
Lehr, E., Coloma, L. A. (2008). ''A minute new Ecuadorian Andean frog (Anura: Strabomantidae, Pristimantis).'' Journal of Herpetology, 64(3), 354-367.
Written by Joshua Parrott (jp175 AT siu.edu), Southern University of Illinois Carbondale
First submitted 2015-06-24
Edited by Gordon Lau (2015-07-06)
Species Account Citation: AmphibiaWeb 2015 Pristimantis andinognomus <http://amphibiaweb.org/species/7224> University of California, Berkeley, CA, USA. Accessed Jun 2, 2020.
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Citation: AmphibiaWeb. 2020. <http://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 2 Jun 2020.
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