Bioacoustics of Anyphaena bifurcata

Description Female Total length 7.1. Carapace yellow, pattern with darker longitudinal bands over cephalic and thoracic areas, carapace margins and clypeus yellow ( Fig. 19A, D ). Sternum surface white, intercoxal triangles present on all legs. Labium brown, white at tip, longer than wide. Endites dark yellow, rectangular, slightly broader at tip ( Fig. 19C ). Chelicerae orange, paturon dorsum with darker and diffuse line pattern ( Fig. 19B, D ), promargin with four teeth, retromargin with eight to nine denticles. Leg coloration: light yellow with scattered dark patches, pattern slightly darker at metatarsi and tarsi. Abdomen yellow, hirsute, dorsal surface covered with scattered small brown patches, pattern lighter at center, forming longitudinal band, lateral surfaces with same pattern faded ventrally, ventral surface white, tracheal spiracle at middle ( Fig. 19A–C ). Copulatory openings inside small internal edges of atrium. Copulatory ducts sclerotized, short, slightly curved, entering spermathecae via lateral surfaces below seminal receptacles. Fertilization ducts short, straight, and emerging from anterior surface of spermathecae ( Figs 20E–F , 21G–H ). Cephalothorax length 2.68, thoracic width 2.2, cephalic width 1.19. Clypeus height 0.11. Eye diameters: AME 0.07, ALE 0.15, PME 0.12, PLE 0.13. Eye interdistances: AME– AME 0.07, AME–ALE 0.06, ALE–PLE 0.1, PME–PME 0.17, PME–PLE 0.1. Femur lengths: I 2.94, II 2.68, III 2.1, IV 2.77. Leg spination: femur I d1-1-1, p0-1-2, r0-1-1. Tibia I v2-2-0, p1-1-1, r1-1-1. Metatarsus I v2-2-0, p1-1-1, r1-1-1. Femur II d1-1-1, p0-1-1, r0-1-1. Tibia II v2-2-0, p1-1-1, r1-1-1. Metatarsus II v2-2-0, p1-1-1, r1-1-1. Femur III d1-1-1, p0-1-1, r0-1-1. Tibia III v2-2-2, p0-1-1, r0-1-1. Metatarsus III v2-2-2, p1-1-2, r1-1-2. Femur IV d1-1-1, p0-0-1, r0-0-1. Tibia IV v2-2-2, p1-1-1, r1-1-1. Metatarsus IV v2-2-2, p1-1-2, r1-1-2. Male Total length 5.8. Cephalothorax and abdomen coloration as in female except yellow chelicerae ( Fig. 19E ). Coxa II ventral surface with broad and shallow tubercle. Coxa III tubercle roughly rectangular with spine at middle. Coxa IV spur located at retrolateral basal corner ( Figs 19F , 21E–F ). Embolus long, translucent and filiform. RTA branches short, anterior branch curved with sclerotized margin, posterior branch small, triangular in dorsal and ventral views ( Figs 20A, C–D, F 21A, C–D ). Prolateral apophysis of palpal tibia small, conical ( Figs 20B–C , 21B–C ). Pedipalp tibia longer than wide, ventral surface with median stridulatory ridges. Median tibial apophysis absent ( Figs 20C , 21A, D ). Cephalothorax length 2.68, thoracic width 2.2, cephalic width 0.9. Clypeus height 0.11. Eye diameters: AME 0.07, ALE 0.11, PME 0.13, PLE 0.13. Eye interdistances: AME–AME 0.06, AME–ALE 0.05, ALE–PLE 0.09, PME– PME 0.15, PME–PLE 0.12. Femur lengths: I 3.1, II 2.94, III 2.26, IV 2.9. Leg spination as in female except: femur II r0-2-1. Femur IV p0-1-1, r0-1-1. Variation Females (N =10): total length 7.2 (± 0.67), cephalothorax length 2.84 (±0.12), thoracic width 2.19 (± 0.07), cephalic width 1.2 (± 0.04), femur I 2.88 (± 0.08). Males (N =10): total length 5.79 (± 0.17), cephalothorax length 2.79 (±0.09), thoracic width 2.21 (±0.06), cephalic width 1.0 (± 0.05), femur I 3.13 (± 0.19).