Diagnosis: A relatively robust caecilian with plumbeous (lead-gray) dorsal color, visible eyes, and a head that does not contrast in color with the body (Savage 2002).
Description: Dermophis gracilior is moderately sized and measures up to 387 mm in total length. This is a somewhat robust species, with a total length-to-body width ratio from 23 to 34 in adults. Total annuli number 156 to 208, with 91 to 117 primary annuli and 65 to 96 secondary annuli. Dorsal surface is lead-gray color, while the venter is cream with dark mottling or mostly gray to dull black. The annular grooves are the same shade as adjacent areas (Savage 2002).
This taxon may represent more than one species; see Savage (2002) for comments. It was removed from synonymy with Dermophis mexicanus by Savage and Wake (2001). It was first described by Günther (1902).
A Spanish-language species account can be found at the website of Instituto Nacional de Biodiversidad (INBio).
- Günther, A. C. L. G. (1902). ''Reptilia and Batrachia. Part 170.'' Biologia Centrali Americana. Volume 7 O. Salvin and F. D. Godman , eds., R. H. Porter and Dulau & Co., London.
- Savage, J. M. (2002). The Amphibians and Reptiles of Costa Rica. University of Chicago Press, Chicago and London.
- Savage, J. M., and Wake, M. H. (2001). ''Reevaluation of the status of taxa of Central American caecilians (Amphibia: Gymnophiona) with comments on their origin and evolution.'' Copeia, 2001(1), 52-64.
- Solís, F., Ibáñez, R., Chaves, G., Savage, J., Jaramillo, C., Fuenmayor, Q., Wilkinson, M., and Bolaños, F. (2008). Dermophis gracilior. In: IUCN 2010. IUCN Red List of Threatened Species. Version 2010.1. www.iucnredlist.org. Downloaded on 13 May 2010.
- Wake, M.H. (1980). "Reproduction, growth, and population structure of the Central American caecilian Dermophis mexicanus (Amphibia: Gymnophiona)." Herpetologica, 36, 244-256.