Chordeumatida Koch

Order Chordeumatida Koch

Suborder Striariidea Cook Superfamily Caseyoidea Verhoeff, 1909 Family Caseyidae Verhoeff,1909

Subfamily Ochrogrammatinae Shear and Marek , new subfamily

Type genus. Ochrogramma Gardner and Shelley, 1989 View in CoL

Diagnosis. Distinctive in the modification of the mandibular stipes of males, which is extended ventrally into a rounded, bordered flange (mf, Fig. 13, 14 View Figures 13–16 , 25 View Figures 25–28 ), and in the extraordinary length of the male gonapophyses (g, Fig. 2 View Figures 1–6 , 15 View Figures 13–16 ), which are as long as or longer than the second leg telopodites. The first legpair ( Fig. 1 View Figures 1–6 ) is short, and the postfemora and tibia mesally carry long, slightly twisted setae. The second legpair coxae are extended into long gonapophyses that are longer than the reduced telopodites of those legs; the openings of the vas deferens are at the bases of the gonapophyses (vd, Fig. 15 View Figures 13–16 ). The coxae of the third legpair (cx3, Fig. 2 View Figures 1–6 , 16 View Figures 13–16 ) have large, flattened lobes; the reduced telopodites (t3, Fig. 2 View Figures 1–6 ) are articulated laterally and distally on these lobes. The gonopods of the males bear on various surfaces complicated, small, much-branched tree-like (arborescent) processes (i.e., Fig. 4 View Figures 1–6 , 7, 8 View Figures 7–12 , 21 View Figures 21–24 ), and some have a reduced, single-articled telopodite (i.e., t, Fig. 5 View Figures 1–6 ). The color of freshly collected material is dark brownish or purplish gray, with a distinct yellow median dorsal stripe that may be less prominent anteriorly and posteriorly. This combination of characters is not found in caseyid genera other than Ochrogramma and Vasingtona .

Included genera. Ochrogramma Gardner and Shelley, 1989 and Vasingtona Chamberlin, 1941 .