Cladistic analysis and taxonomic revision of the genus Karos Goodnight & Goodnight, 1944 (Opiliones, Laniatores, Stygnopsidae) Author Cruz-López, Jesús A. Author Francke, Oscar F. text Zoological Journal of the Linnean Society 2015 2015-11-18 175 4 827 891 http://dx.doi.org/10.1111/zoj.12299 journal article 10.1111/zoj.12299 0024-4082 5339971 POTOSA REDDELLI SP. NOV. ( FIGS 38–40 , 58 , 60B ) Type material: MEXICO : Hidalgo : ♂ holotype , and 1 ♂ and 5 ♀ paratypes [ CNAN-T0797 and CNAN- T0798 ( 18.iii.1981 ; J. Reddell , D. McKenzie , T . Archey , and F. Endres )], ( 21°5′55.96″N , 98°22′58.98″W ). Municipio Huejutla , Cueva de San José, San José Ahuantempa . Etymology: Patronym in honour of Mr James Reddell for his contributions to the knowledge of arachnids from Mexico , and as collector of the type specimens. Diagnosis: Troglobitic species. Ocularium without armature ( Fig. 38C ). Dorsum roguse, only with few and very small tubercles ( Fig. 39C ). Glandular opening basal in metatarsus I ( Figs 39B , 60B ). Pars distalis with three to four lateral setae on each side, basal-most separat- ed from the others. Four pairs of ventral microsetae ( Fig. 40 ). Description: Male holotype : Measurements: scutum length 3.1, maximum scutum width 2.5. Legs. I 1.35/ 0.50/0.95/1.27, II 2.05/0.72/1.75/1.80, III 1.65/0.45/1.45/ 1.62, IV 2.30/0.97/2.37/2.40. Dorsum . Rugose, ornamentation almost absent, only a few small tubercles present on central portion of areas II–IV. Sulcus between mesotergal areas not clearly visible ( Fig. 38B ). Free tergites with median row of rounded tubercles. Ocularium in the middle of prosoma, semitriangular in lateral view, rounded apically, unarmed, only covered by small tubercles ( Figs 38C , 39C ). Lateral clear areas projected in rounded, inconspicuous tubercles. Clear areas present on apices of area V and free tergites I and II, very low and inconspicuous. Venter. Covered uniformly by small, rounded tubercles. Stigmatic area long and constrained in the middle by median portion of coxa IV. Coxa IV with small dorsoectal dentiform tooth. Pedipalps. Patella with two mesal spiniform tubercles. Legs. Similar in ornamentation, densely covered by small rounded tubercles. Metatarsus I slightly swollen near base, glandular opening basal ( Figs 39B , 60B ). Legs IV wider than the rest, curved. Metatarsus II without clear annuli. Tarsal count 4(2):6(3):5/6:6. Male genitalia. Three or four lateral setae, basal pair noticeably separated from the rest. Four pairs of ventral microsetae, the two distal pairs separated from the rest ( Fig. 40 ). Female: Measurements: scutum length 3.1, maximum scutum width 2.5. Similar to male, with the following differences: metatarsus I without glandular opening ( Fig. 39B ) and tarsal count 4(2):6(3): 6:6.