Stygobromus tenuis tenuis (S. I. Smith 1874)

Stygobromus tenuis tenuis (Smith)

Crangonyx tenuis Smith, 1874:656–657 [type-locality: wells at Middletown, Middlesex Co., Connecticut].

Stygonectes tenuis tenuis (Smith).—Holsinger, 1967:58–62, fig. 12.—Culver and Holsinger, 1969:632.—Holsinger, 1972:61.

Stygobromus tenuis tenuis (Smith).—Karaman, 1974:119–120.—Holsinger, 1977:262.

MATERIAL EXAMINED.—MARYLAND. Baltimore Co.: spring-fed stream at Carroll Rd. in Phoenix, 2 , A. and B. Norden, 18 Apr 1976.

DIAGNOSIS.—This subspecies is distinguished by the diagnosis and description given earlier by Holsinger (1967:58–62). Largest males, 12.00 mm; largest females, 9.7 mm.

DISTRIBUTION AND ECOLOGY.—A discussion of the distribution and general ecology of S. t. tenuis are found in Holsinger (1967, 1972). Briefly, the subspecies occupies shallow groundwater habitats (e.g., wells, seeps, and small springs) and ranges from the New England Province in central Connecticut and southeastern New York south-southwestward to the Coastal Plain and Piedmont of eastern Maryland. A large disjunction in the range occurs between New York and Maryland.