Author: Collette, 1962
Remark: type catalog: Ibarra & Stewart 1987: 12, Ferraris & Vari 1992: 10.
Comments: Found only in the perpetually dark regions of cave some 300 meters to 2 kilometers from its mouth.  This species is a true cave form, complete with minute eyes and lack of pigments.  Hides in holes of rocks.  Feeds on mayfly nymphs.