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An extremely rare, blind, cave-dwelling salamander. Initially four individuals were discovered while a spring was being excavated, but only one preserved specimen currently is known. Pigmentless, gilled throughout life, and with extremely reduced eyes. The body is stout, the limbs relatively robust, and the tail thick with a moderately high tail fin. 57 mm snout to vent length (101 mm total length) (Potter and Sweet 1981; Petranka 1998).
Until recently E. rathbuni and E. robusta were placed in the genus Typhlomolge. Although they are extreme in their specializations for living in underground aquatic systems, these two species are closely related to other species of Eurycea from Texas and the eastern United States (Chippindale 1995; Petranka 1998).