Bioacoustics of Pseudotyphistes deinceps

Description. Male holotype (FCE-Ar 10399). Total length: 1.50. Carapace length: 0.62, width: 0.42. Clypeus height: 0.06. Sternum length: 0.34, width: 0.28. Chelicerae length: 0.22. Abdomen length: 0.82, width: 0.42, height: 0.46. Leg formula: IV/I/II/III. Leg lengths (I/II/III/IV): femora: 0.52/0.46/0.40/0.58; patellae: 0.12/0.12/0.12/0.14; tibiae: 0.54/0.44/0.34/0.54; metatarsi: 0.44/0.38/0.36/0.46; tarsi: 0.34/0.32/0.28/0.30; total: 1.96/1.72/1.50/2.02. Palp (femur, patella, tibia, cymbium): 0.16/0.08/0.08/0.20. Metatarsal trichobothria I–III present, IV absent. TmI: 0.32. Eye diameters and interdistances: AME: 0.03, ALE: 0.04, PME: 0.04 and PLE: 0.04; AME-ALE: 0.01, PME-PLE: 0.02, AME-AME: 0.02, PME-PME: 0.04. Eyes with black margins. Setae present at ocular area. Clypeus glabrous. Carapace light brownish, narrowed anteriorly, larger than wide, borders dark brown ( Fig. 1F ). Chelicerae light brown; chelicerae stridulatory striae ~11 striae, imbricated, well-spaced ( Fig. 2A ); paturon with scattered small setae. Chelicerae promargin with five teeth, retromargin with three tiny teeth and difficult to see due to darker coloration in the paturon. Endites yellowish brown, lighter in serrula area, with setae. Labium yellowish brown. Sternum light brown, with dispersed setae. Palps light brown. Legs long and slender, yellow; coxae pale yellow. Distal end of metatarsi I with dorsal lyriform organ ( Figs 2B–C ). Trochanter I with black retrolateral spot. Femur I with basal black retrolateral spot. Abdomen elliptical, longer than wide, dorsally pale yellowish brown, laterally with interrupted pale brown vertical stripes ( Fig. 1F ), ventrally with same coloration as in dorsum. Spinnerets pale yellowish brown. Colulus present. Palpal patella with one dorsal macroseta ( Figs 1A , 2D ). Palpal tibia with one retrolateral, one dorsal and one ventral trichobothrium, a short truncated retrolateral tibial apophysis ( Fig. 1A ) and a retrolateral large macroseta reaching the dorsal cymbial macroseta ( Figs 1A , 2D ). Paracymbium well developed, t-shaped, arising from the mesal side ( Figs 1A , 2D ). Dorsal cymbial macroseta smooth, round in crosssection, with the apex pointing towards the apical and ventral part of the bulb ( Figs 1A , 2D ). Subtegulum ectal to tegulum; suprategular apophysis present, blunt-ended ( Figs 1A–B , 2D ). Radix and tailpiece well developed ( Fig. 1B ). Embolus short and sharp ( Fig. 1B ). Female paratype (FCE-Ar 10915). Total length: 1.72. Carapace length: 0.60, width: 0.38. Clypeus height: 0.10. Sternum length: 0.38, width: 0.32. Chelicerae length: 0.24. Abdomen length: 1.10, width: 0.64, height: 0.60. Leg formula: IV/I/III/II. Leg lengths (I/II/III/IV): femora: 0.48/0.42/0.40/0.54; patellae: 0.16/0.14/0.14/0.14; tibiae: 0.46/0.34/0.32/0.52; metatarsi: 0.40/0.28/0.34/0.40; tarsi: 0.34/0.26/0.28/0.28; total: 1.84/1.44/1.48/1.88.Palp (femur, patella, tibia, tarsus): 0.16/0.06/0.10/0.16. Metatarsal trichobothria I–III present, IV absent. TmI: 0.30. Eye diameters and interdistances: AME: 0.02, ALE: 0.04, PME: 0.04 and PLE: 0.04; AME-ALE: 0.02, PME-PLE: 0.02, AME-AME: 0.01, PME-PME: 0.04. Eyes with black margins. Setae present at ocular area. Clypeus glabrous. Carapace light brownish, narrowed anteriorly, larger than wide, borders dark brown ( Fig. 1G ). Chelicerae dark brown, white next to fangs. Chelicerae promargin with five teeth, retromargin without teeth. Endites dark brown, lighter in serrula area, with setae. Labium yellowish brown. Sternum dark brown, with dispersed setae. Palps dark brown. Legs long and slender, yellow; coxae II–IV pale yellow. Coxa I dark brown. Trochanter I with brown retrolateral spot. Femur I with basal brown retrolateral spot. Abdomen elliptical, longer than wide, dorsally and laterally pale yellowish brown with even yellow small dots ( Fig. 1G ), ventrally with same coloration but without dots. Spinnerets pale brown. Colulus present. Ventral and dorsal plates extend ventrally out of the abdomen forming a conspicuous scape ( Figs 1C–E , 2E ). Spermathecae reniform ( Fig. 1D ). Copulatory ducts extend along margins of scape ( Fig. 1D ). Fertilization ducts arise from the anterior part of spermathecae ( Fig. 1D ). Scape with an apical depression ( Fig. 1C ). Copulatory openings line shaped, at each side of the distal end of the scape ( Figs 1C–D , 2E–F ). Variation: Males (n=3). Total length 1.50–1.60; carapace length 0.62–0.72, carapace width 0.33–0.51; femur I 0.52–0.66. Females (n=3). Total length 1.62–1.89; carapace length 0.60–0.72, carapace width 0.38–0.48; femur I 0.48–0.60.