is a small slender species of caecilian which grows to 217 mm in length (Savage 2002). It is the most slender caecilian in Costa Rica (Leenders 2001). It can be distinguished by a pink to gray-brown head that contrasts with the purplish slate color of the dorsum (Savage 2002). Ventrally, this caecilian is grayish (Savage 2002). The throat, lower jaw, and the area near the vent are white (Leenders 2001). The eyes are visible through the skin (Savage 2002). A short tentacle is located about halfway between the eye and nostril on each side of its head (Savage 2002; Leenders 2001). The head is elongated (Leenders 2001). This species has both primary and secondary annuli; 85-102 primary annuli and 11-26 secondary annuli may be present, with total numbers of annuli ranging from 97-126 (Savage 2002). The secondary annuli are few in number compared to other sympatric caecilians, and occur at the posterior of the animal near the vent (Leenders 2001). As with all caecilians, there are no external ear openings (Leenders 2001).
A Spanish-language species account can be found at the website of Instituto Nacional de Biodiversidad (INBio).
Leenders, T. (2001). A Guide to Amphibians And Reptiles of Costa Rica. Zona Tropical, Miami.
Savage, J. M. (2002). The Amphibians and Reptiles of Costa Rica. University of Chicago Press, Chicago and London.