Bioacoustics of Erigone denticulata

Description (Briscoe County, specimens illustrated). — Male ( Fig. 9 ): Total length: 2.18 mm ; carapace length: 1.05 mm ; carapace width (excluding denticles): 0.77 mm ; carapace with lateral row of denticles with a small ridge above row ( Fig. 7 ; similar to Hormiga 2000 , fig. 86a). Sternum darker brown. Chelicera depressed basally on retrolateral marginal face, with 8 large, distally curved denticles on anteriolateral margins and 10– 12 denticles scattered over promargin basally, also few short thick macrosetae basal to stridulatory file, promargin with 1 mega denticle and 1 large denticle, retromargin with 3 denticles plus 1 smaller distal denticle; cheliceral stridulatory file as large striae on posteriolateral surface (visible with dissection microscope). Cheliceral fang thickened on basal half and with a brush of very fine denticles centrally. Abdomen 1.13 mm long, uniformly colored, no patterns. Legs, tibia I–IV with one dorsal macroseta; metatarsus I with dorsal trichobothrium, TmI 0.43, TmIV 0.52. Pedipalpal femur curved mesally, then dorsally, recurved at distal end ( Figs 9 , 18 ), mesal side with longitudinal row of denticles; patella with a thick, stout, apophysis ( Figs 7 , 18 ); tibia straight across distodorsal end, not notched or otherwise modified in center, mesal side (about 2/3 from basal end) with raised area tipped with small spur-like point ( Fig. 18, 19 ); embolus thick, straight, pointed at tip ( Figs 18, 19 ); other details of pedipalp as in Fig. 19 . Female : Total length: 2.65 mm , carapace length: 1.05 mm , carapace width: 0.75 mm ; carapace coloration as in male, pattern 3 erect setae along midline. Carapace and chelicerae dark amber to yellowish-brown, sternum darker brown; carapace elevated in anterior third; posteriolateral margins of carapace with noticeable small granules to minute denticles; without ridge laterally as in male. Chelicera slightly enlarged basally, with 6–8 denticles in a row on anteriolateral margin; promargin of cheliceral fang furrow with 2 larger and 3 smaller denticles (distal most minute), retromargin with 3 denticles (one distal smaller denticle on each chelicera); stridulatory file not visible with dissection microscope (present as striae on posteriolateral margin at 200X). Abdomen unpatterned, darker brown to gray brown, darker than carapace; length 1.60 mm , densely covered with semi-erect setae. Legs light yellow to amber, tibia I–IV each with one dorsal macroseta; metatarsus I with dorsal trichobothrium, TmI 0.57, TmIV absent. Posterior portion of the epigynal plate sclerotized ( Fig. 21 ). Spermathecae only slightly visible through the cuticle and not extending much beyond the epigynal plate ( Figs 22, 23 ). Spermathecae oval and oriented obliquely, fertilization ducts only slightly curved, copulatory ducts long and curved ( Fig. 23 ).