Description

This is a tiny species; adult standard length averages 17.9 mm in 12 males (range 15.5-19.3) and 18.5 mm in 10 females (range 16.9-21.4). The head is relatively broad; SL averages 7.0 times head width in males (range 6.2-7.4) and 7.1 times head width in females (range 6.5-7.7). Snouts are short and pointed. Nostrils are round to slightly oval; the mean ratio of major axis to minor axis is 1.06 in males (range 1.00-1.11) and 1.03 in females (range 1.00-1.11). Nostrils are relatively small in both sexes, but slightly larger in males (mean length of major axis 0.41 mm) than in females (0.39 mm), despite the males' smaller average body size. The eyes, though small, are prominent and extend beyond the margin of the head in ventral view. A suborbital groove intersects the lip on each side of the head. There are 1-2 premaxillary teeth in males (mean 1.2) and 2-4 teeth in females (mean 2.8). Vomerine teeth average 6.4 in males (range 5-8) and 6.2 in females (range 6-7). There are no maxillary teeth. Limbs are relatively long; limb interval averages 4.3 in males (range 3-5.5) and 4.6 in females (range 3.5-5.5). Hands and feet are narrow; digits are short and the longest ones are pointed. The tail is relatively long, typically much longer than standard length; mean SL divided by tail length equals 0.83 in males (range 0.60-1.08) and 0.80 in females (range 0.70-0.96). The parotoid gland is discrete, but the mental gland is indistinct, even in large adult males. In terms of external characters, this is among the least sexually dimorphic of any species in the genus.

Coloration in life, based on field notes by J. Hanken for MVZ 186902: There is a brownish dorsal stripe with a fine, black-and-brown herringbone pattern. The venter is dark with fine white flecking