File:Bulletin - United States National Museum (1967) (14597701580).jpg

Identifier: bulletinunitedst2591967unit (find matches)
Title: Bulletin - United States National Museum
Year: 1877 (1870s)
Authors: United States National Museum Smithsonian Institution United States. Dept. of the Interior
Subjects: Science
Publisher: Washington : Smithsonian Institution Press, (etc.) for sale by the Supt. of Docs., U.S. Govt Print. Off.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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cave. Distribution and ecology.—Only one other record exists outsideof the type locality. A single female was collected from a tributaryto the Cow Pasture River in June, 1960 (cf.. Material examined).This site is roughly 20 miles southwest of Witheros Cave but in thesame drainage system. This single epigean record is undoubtedlythe result of the animal having been washed out of a subterraneanhabitat. Collections of S. mundus from the type locality have beenmade at two different sites in the cave, and both collections containedspecimens of S. morrisoni (see below). The ratio of abundance ofthe latter to the former was 14:3. Stygonectes morrisoni, new species Figure 4 Material examined VIRGINIA.—Bath Co.: Witheros Cave, female holotype, male allotype, and 13paratypes, J. P. E. Morrison, Mar. 22 and 23, 1941 (USNM). Diagnosis.—Generally distinguished from other species of theemarginatus group by relatively small size, small to rudimentary inner SUBTERRANEAN AMPHIPOD STYGONECTES 29
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Figure 4.—Stygonedes morrisoni, new species. Female (6.75 mm); Witheros Cave, Va.:a-c, uropods 1,2,3; d, telson; e, lower lip;/, coxal plate of pereopod 3; g-j, pereopods4,5,6,7; k,l, antennae 1,2; m, abdominal side plates. Male (6.00 mm), same locality:n,o, gnathopods 1,2; p, uropod 3; q, telson. 30 U.S. NATIONAL MUSEUM BULLETIN 259 lobes of lower lip, and by the defined distoposterior lobes of bases ofpereopods 5-7. Further distinguished from S. mundus, with which itoccurs sympatrically, by the shallow excavation in apical margin ofthe telson. Largest male, 6.00 mm; largest female, 6.75 mm. Antenna 1 about 50 percent as long as body and about twice thelength of antenna 2; primary flagellum of 15 to 17 segments. An-tenna 2, flagellum with up to 7 segments. Mandibular palp segment 3comparatively broad, with about 7 long setae; segment 2 with 7 setae.Maxilla 1, mner plate with 7 apical, plumose setae. Maxilla 2, innerplate with 9 long, obliquely placed, plumose setae, Maxilliped,oute

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