Böhlke, J. E. and J. E. McCosker 1975 (28 Apr.) [ref. 607]
The status of the ophichthid eel genera Caecula Vahl and Sphagebranchus Bloch, and the description of a new genus and species from fresh waters in Brazil. Proceedings of the Academy of Natural Sciences of Philadelphia v. 127 (no. 1): 1-11.