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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oblique,straight, armed with a double row of about 9 spine teeth; posteriorangle with 1 large spine and 4 smaller spines on outside; 6 smallspines on inside; posterior margin convex, with 4 sets of setae; lateralsetae mostly singly inserted. Gnathopod 2: propod about equal insize to 1st but a little more slender; palmar margin generally straight,armed with a double row of 10 spine teeth; posterior angle with 1 largespine, 4 smaller spines and 2 long setae on outside, 5 small spines oninside; posterior margin with 3 or 4 sets of setae; superior lateralsetae mostly doubly inserted, inferior lateral setae singly inserted.Coxal plates of pereopods 2 and 3 about 20 percent longer than broad,marginally with 3 spinules and 5 setae each. Coxal plate of pereopod4 subquadrate, extending distally for about 1/2 the length of segment2; ventral margin with 10 setae. Pereopod 7 about 50 percent aslong as body, about equal in length to pereopod 6 and 25 percent 118 U.S. NATIONAL MUSEUM BULLETIN 2 59
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Figure 28.—Stygonedes pecki, new species. Female holotype (10.5 mm), Comal Springs,Tex.: a,b, antennae 1,2; c, telson; d-f, uropods 1,2,3; g, abdominal side plates; h, leftmandible; i, dentate part of right mandible; ;, lower lip; k, maxilla 2; /, maxilla 1;m, maxilliped; n,o, gnathopods 1,2; p, coxal plate of pereopod 3; g-t, pereopods 4,5,6,7. SUBTERRANEAN AlVIPHIPOD STYGONECTES 119 longer than pereopod 5. Bases of pereopods 5-7 narrowing distally;distoposterior lobes poorly developed, almost absent in pereopod 7.Dactyls of pereopods 5-7 approximately 1/4 as long as correspondingpropods. Abdominal side plates: posterior margins nearly straight in 1 and 2,slightly convex in 3; posterior corners distinct, blunt; ventral marginsof plates 2 and 3 with 2 or 3 spines each. Pleopod 1, inner ramus 40to 45 percent longer than peduncle. Uropod 1: outer ramus about 70percent as long as inner ramus, about 50 percent as long as peduncle,armed with 8 spines; inner ramus with 13 spines; peduncle

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