Stygobromus mundus (Holsinger 1967)

Stygobromus mundus (Holsinger)

Stygonectes mundus Holsinger, 1967:26–28, fig. 3 [type-locality: Witheros Cave, Bath Co., Virginia]; 1969a:32–33, 47;1972:59.

Stygobromus mundus (Holsinger).—Karaman, 1974:114–115.—Holsinger, 1977:262.

DIAGNOSIS.—A medium-sized cavernicolous species closely related to S. emarginatus and S. morrisoni but distinguished from the former species as previously noted (Holsinger, 1967) and as follows: Inner plate of maxilliped with fewer spines (generally similar to S. morrisoni in this character). Propod of 1st gnathopod with only 2 long spine teeth on outside of defining angle. Posterior margin of 2nd gnathopod propod with only 3 sets setae. Median sternal gills absent. Pleonal plates 1 and 2 with 2 or 3 posterior marginal setae, posterior corners of plate 2 indistinct. Apical margin of telson entire, convex, unnotched. Largest male, 8.0 mm; largest female, 8.2 mm.

DISTRIBUTION.—This species is known only from four specimens (3 females, 1 male) collected from two different localities in west-central Virginia—Witheros Cave in Bath County and a tributary to the Cow Pasture River in Alleghany County (Holsinger, 1967:28). These localities are situated about 24 km apart and both are in the upper James River drainage.

Stygobromus mundus, commonly called Bath County cave amphipod, is a troglomorphic species of amphipod in family Crangonyctidae. It is endemic to Bath County, Virginia in the United States.