Pseudotremia rhadamanthus Shear

This species is known only from Terrill Cave, Marshall Co., Alabama, and Monteagle Saltpeter Cave, in Cave Cove, Marion Co., Tennessee (Shear 1972). The locality in Marion County occurs about 7 miles (11 km) south of the southernmost locality for P. barri . P. rhadamanthus differs from P. barri in possessing a large subapical spine on the median angiocoxite and a bifurcate lateral angiocoxite.