Bioacoustics of Neodietrichia hesperia

Description. Male (AMNH_IZC 00328051, holotype ; Figs. 2A–E , 3A–E ). Smaller sized (1.38–1.70 total length) erigonines with carapace dusky dark orange to light brown, black around eyes, legs dark yellow in color, and abdomen dark gray to black, often with lighter mottling. Eyes, teeth, pits, anterior and posterior sulci, venter, and spinnerets typical of genus. Chelicerae with 10–13 stridulatory ridges. Clypeus with slight anterior bulge and hairs present. Leg lengths, macrosetae, and claw teeth typical of genus. Metatarsi I–III each with single trichobothrium; metatarsus IV lacking trichobothrium; tibia I–III each with single trichobothrium; tibia IV with 1–3 trichobothria. Pedipalp with large medial radical apophysis that, when viewed ventrally, angles prolaterally and then bends inward distally. Embolus long and extends anteriorly along the retrolateral side of the palp with the point converging near the apex of the radical apophysis. Protegulum extends anteriorly, adjacent to the radical apophysis, but exterior to the distal part of the embolus. Paracymbium small and rounded at the tip ( Figs. 2B, E , 3A ). Palpal tibial apophysis long, thin, straight, and relatively flat with one or two distal or semi-distal spines ( Figs. 2C–E , 3C, D ). Female (RB, Ohio : Vinton Co.; Figs. 2F–H , 3F, G ). Smaller sized (1.48–1.80) erigonines with coloration of carapace and legs as in male. Abdomen gray as in some of the lighter-colored males. Females lack sulci and pits. Clypeus not bulged and lacking large numbers of clypeal hairs as in male. Eyes, teeth, venter, spinnerets, chelicerae, leg lengths, macrosetae, trichobothria, and claw teeth as in male. Epigynum with single concave anterior hood and dual, ventrally-visible spermathecae. Median plate wide posteriorly and narrows anteriorly. Spermathecae directed centrally, underneath thinner part of median plate. Dual copulatory openings exist medially near narrowing of median plate. Fertilization and copulatory ducts coiled laterally to spermathecae ( Figs. 2H , 3G ). Measurements. Male: (n=3): Total length, 1.38–1.70 (mean=1.53); carapace length, 0.66–0.76 (mean=0.71); carapace width, 0.51–0.53 (mean=0.52); femur I length, 0.44–0.52 (mean=0.47); TmI (n=2), 0.59–0.63 (mean = 0.61). Female : (n=3): Total length, 1.48–1.8 (mean=1.66); carapace length (n=4), 0.62–0.72 (mean=0.67); carapace width, 0.49–0.53, (mean=0.51); femur I length, 0.42–0.45 (mean=0.44); TmI (n=3), 0.62–0.65 (mean = 0.63). Variation. The three male specimens that are known all slightly differ in the shape (width and orientation) and number and/or location of spines on the tibial apophysis ( Fig. 6 ). There was no morphological variation seen in the four females examined.