[1] The specific name trachyceps is said to be derived from Greek trachy meaning "rough" and Latin ceps meaning "head", in reference to the rough appearance of the head.

The snout is bluntly rounded in dorsal view and truncate in profile.

The flanks are brown or green, and the groin is blue with black spots.

It was reported as relatively common at the type locality, but recent surveys have failed to locate it.

The second population in Vereda Santa Elena was discovered in 2005, but an intensive survey in 2016 recovered only one individual.