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searchable PDF - Association for Mexican Cave Studies

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Description.-Total body length, 1.51-2.10.Scute length, 1.00-1.31. Leg II length, 2.92-4.03.Leg II/Scute length, 2.60-3.27. (N=23).Color orange to brownish orange. Body coarselyrugose; tubercles present on eye mound, dorsal andlateral surfaces of pars thoracica, tergite margins,and ventral and lateral faces of coxae. Carapacewith 9-12 pairs of anterior tubercles arranged indouble rows. Eye mound broadly conical, eyeswell developed. Palpal megaspines: trochanter, 1ventral; femur, 1 mesoapical; patella, 2 mesal; tibia,3 mesal. Tarsal count: 3-5-4-5.Male (holotype): Total body length, 1.72. Scutelength, 1.18; width, 1.26. Eye mound length, 0.31;width,0.26. Leg II length, 3.31. TrIV with threetubercles. POP absent.Penis (Figs. 12-15): VPP with apex stronglybent; 2 dorsal, 8 lateral, and 4 ventral setae; ASlong, evenly curved, with small, subapical tooth.Glans with BK absent; ML apparently present,small; PSL long, ribbon-like, apically bifurcate;PSL2 present, transversely directed. S long, compressed;lacking BF and SA.Female (allotype): Total body length, 1.67.Scute length, 1.15; width, 1.31. Eye mound length,0.30; width, 0.27. Leg II length, 3.13. TrochanterIV with ventral tubercle.Ovipositor (Figs. 18-21): cuticle intricately folded;dorsal surface sparsely set with small spines;ventral with microtubercles; 1 pair apical teeth present;setal pattern typical.Variation.-Slight differences were detected inthe male genitalia. The tip of the stylus varies inshape and the subapical prongs of the PSL varyslightly in size and curvature.The number of ventral tubercles on Tr IV varies,even within a single population. Typically, maleshave two tubercles, the apical being twice the lengthand diameter of the basal, and females have a singlesmall tubercle. Some males were found with one(five out of 26 specimens examined) or three (5/26)tubercles, as well as some females with zero (2/11)or two (3/11). Males from Round Mountain haveone or two tubercles, all small. In the Oregonpopulations, males have only the single, apical tubercle(which is of moderate size) and the femaleslack them altogether.The individuals from Oregon are also paler andsomewhat smaller than those from Cali<strong>for</strong>nia, having:SL = 1.00-1.10 (N = 5), compared to SL =1.13-1.31 <strong>for</strong> remaining epigean specimens measured(N = 18); SW = 1.08-1.15 (1.18-1.41 <strong>for</strong> theremaining specimens); LIIL = 2.92-3.10 (3.13-3.59<strong>for</strong> the remaining specimens). The single OregonFigs. 16-17.-Texella bifurcata (Briggs), female topotype: 16, anterior half of body, lateral view;17, trochanter IV, lateral view.177

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