Cave millipedes of the United States. XV. Coloradesmus gen. nov. (Diplopoda, Polydesmida, Macrosternodesmidae), and four new species from caves in Colorado, USA Author Shear, William A. Author Steinmann, David B. text Subterranean Biology 2019 32 15 32 http://dx.doi.org/10.3897/subtbiol.32.38161 journal article http://dx.doi.org/10.3897/subtbiol.32.38161 1314-2615-32-15 731EF530E43D4FB8AAA39B4A0AD1AE09 Coloradesmus hopkinsae Shear & Steinmann sp. nov. Figs 9-10 , 11-14 , 15 Types . Male holotype and male paratypes from Colorado, Garfield Co.: Bair Cave, 9800' asl, 39°38'N , 107°14'W , 200 ft from entrance, collected September 1998 and 19 June 1999 by D. Steinmann. Diagnosis. Similar in somatic characters to both C. aquiliensis and C. manitou , but differing from both in the broader, more irregularly shaped prefemoral process of the gonopods, and in having a short endomerite tightly appressed to the prefemoral process. Etymology. The species is named in honor of Kay Hopkins of the United States Forest Service for her contributions to cave conservation, cave research and cave preservation. Description. Male holotype. Length about 7.0 mm, greatest width 0.66 mm. With the characters of the genus. Head sparsely setose. Basal joint of mandibles not greatly exceeding width of collum; front margin of collum evenly arcuate, posterior margin shallowly embayed ( Fig. 9 ). Setae of collum and metazonites acute throughout ( Figs 9 - 11 ), setal rows of metazonites sometimes interrupted, supplemental setae sometimes present ( Fig. 10 ). Setal tubercles become more prominent posteriorly ( cf. Figs 10 , 11 ). Telson rounded, with two distinct rows of setae; epiproct blunt ( Fig. 11 ). Gonopod socket occupies entire width of prozonite, subcordate, indenting ninth sternite ( Fig. 12 ). Gonopods with robust acropodite (a, Fig. 13 ), ending in long, acute distal zone (dz, Figs 13 , 14 ); seminal pore long, with many tiny finger-like cuticular projections ( Fig. 15 ); endomerite (e, Fig. 13 ) short, tightly appressed to prefemoral process. Prefemoral process (pfp, Figs 13 , 14 ), large, broad, scoop-shaped, with subapical lateral tooth, tip acute, slightly lobed. Figures 11-14. Coloradesmus hopkinae male. 11 Telson, dorsal view 12 gonopods, ventral view 13 right gonopod, mesal view 14 right gonopod, medioposterior view. See text for explanation of labels. Figures 15-20. Coloradesmus species males. 15 C. hopkinae , gonopod seminal pore 16-20 C. manitou 16 collum, dorsal view 17 midbody ring, dorsal view 18 telson, dorsal view 19 gonopods, ventral view 20 Gonopods, posterior view. See text for explanation of labels. Distribution. COLORADO: Garfield Co.: Groaning Cave, 39°42'N , 107°10'W , 9800' (2804 m) asl, 9 October 2008, D. Steinmann, male, females, juveniles.