Generic Boundaries in Texas Cave Salamanders, and a Redescription of Typhlomolge robusta (Amphibia: Plethodontidae)

Abstract
Confusion presently surrounds the systematics of the salamanders of Eurycea and Typhlomolge of the Edwards Plateau of central Texas [USA]. Existing morphological evidence is inadequate for resolving the status of Typhlomolge. New data on skull morphology supports the continued recognition of this genus. The advanced troglobite T. robusta Longley, 1978, is redescribed and shares the features which distinguish T. rathbuni Stejneger from the Texas Eurycea. T. rathbuni and T. robusta may be parapatric in the San Marcos Pool of the Balcones Aquifer.

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