Systematics of the subterranean amphipod genus Stygobromus (Gammaridae), Part 1: species of the western United States

Call Number:

URL:

Keywords:

Abstract:

The subterranean amphipod genus Stygobromus is restricted to North America with the exception of one poorly known species from Siberia. Stygobromus is a member of the Crangonyx group of the family Gammaridae and is closely related to two other North American subterranean genera—Apocrangonyx and Stygonectes. It also has a close affinity with the Holarctic genus Synurella. Species of Stygobromus are widely distributed in cave waters and related ground water habitats throughout the greater part of the cavernous regions of the eastern, middle western, and far western United States. A revised diagnosis of the genus is given, accompanied by a redescription of S. hubbsi Shoemaker from Oregon and the descriptions of 17 new species from the western United States. Of the 18 species recorded from the West, 15 belong to the newly erected hubbsi group. Stygobromus putealis (Holmes) from wells in Wisconsin is also assigned to this evolutionary group. Members of the hubbsi group are closely allied morphologically and are assumed to have been derived from a common ancestor. The western species inhabit a variety of subterranean biotopes, including limestone and lava caves, wells, springs, and one deep lake.

Notes:

ELECTRONIC FILE - Zoology: Invertebrates

SWAP (2/19/2016) citation:
Holsinger JR. 1974. Systematics of the subterranean amphipod genus Stygobromus (Gammaridae), Part 1: species of the western United States. Washington (DC): Smithsonian Institution Press. (Smithsonian contributions to zoology; no. 160). 63 p. [accessed 2016 Feb 18]. http://www.sil.si.edu/smithsoniancontributions/zoology/pdf_hi/SCTZ-0160.pdf