Bioacoustics of Diguetia signata

Description. Male (CARCIB-Ar 04263). Coloration: carapace dark yellow with scarce white setae, fovea inconspicuous but with a depressed area from where two dark bands emerge toward ocular area, carapace margins and clypeus with scarce white setae, eyes with black rings ( Fig. 67 ). Chelicerae darker than carapace and with scarce long setae. Labium, and endites dark yellow, sternum darker than endites, both with sparse white setae, and endites with dark margins ( Fig. 69 ). Fm I dusky yellow darker distally Pt I, Ti I and Mt I dark yellow, Ta yellow. Legs II–IV dusky yellow, Pt II–IV slightly darker, Fm II–IV and Ti II–IV with faint distal rings, Mt II–IV and Ta II–IV darker distally ( Fig. 83 ). Dorsum and sides of opisthosoma dark yellow covered with white setae, dorsum with a longitudinal gray patch followed by sinuous white setae bands ( Fig. 68 ). Venter of opisthosoma dusky brown with white scales, epigastric area dark yellow, but darker medially, and spinnerets dark brown ( Fig. 70 ). Habitus : carapace elliptical cephalic region slightly narrower than thoracic region ( Fig. 67 ). Front face of chelicerae rugged, the stridulatory file occupying almost all lateral face. Promargin of chelicerae with transparent lamina and two distal teeth; retromargin without teeth. Labium, sternum and endites longer than wide ( Fig. 69 ). Opisthosoma without caudal extension. Palp : Fm with four stridulating pins, Ta with two finger-like processes, the prolateral one shorter ( Fig. 77 ), the suboval bulb narrows apically as seen laterally ( Figs 77, 80–81 ), sub-square shaped bulb as seen dorsally (1.0 long, 0.40 wide; Figs 79, 82 ), with spoon-shaped embolus (0.50 long) and a tubular straight prong, tip slightly wide ( Figs 77–82 ), less half-length of embolus (0.18), small bulge near Bp (blue arrow in Figs 79–80, 82 ). Measurements : total length 5.0; carapace 2.25 long, 1.65 wide; clypeus height 0.26; chelicerae length 0.82. Eye sizes and interdistances: AME 0.14, ALE 0.12, PME 0.14; AME–ALE 0.1, AME–PME 0.22. Length of legs segments: I 12.99 (4.37, 0.75, 3.25, 3.0, 1.62), II 11.37 (3.75, 0.75, 2.75, 2.87, l.25) III 7.85 (2.87, 0.37, 1.62, 1.87, 1.12), IV 12.85 (4.12, 0.62, 3.37, 3.62, 1.12). Leg formula 1423. Female (CARCIB 4265). Coloration : carapace as the male ( Figs 71–74 ), endites, labium, endites and coxae darker than male ( Fig. 73 ). Legs as male but Pt I–IV distinctly darker, Fm I–IV and Ti I–IV with well-marked distal rings, Mt I–IV and Ta I–IV darker distally, segments and rings of leg IV profusely darker than other legs ( Fig. 84 ). Dorsum of opisthosoma with a longitudinal dark-brown maculation ( Fig. 72 ), venter lighter than males ( Fig. 74 ). External genitalia : triangular anterior sclerotization larger than posterior, which is a small strip ( Fig. 75 ). Internal genitalia : two anterior oval pore plates, wide uterus externus and membranous median sac, longer than wide, with apical portion subspherical and wider than basal ( Fig. 76 ). Measurements : total length 8.13; carapace 3.75 long, 2.25 wide; clypeus height 0.5; chelicerae length 1.05. Eye sizes and interdistances: AME 0.16, ALE 0.14, PME 0.16; AME–ALE 0.32, AME–PME 0.42. Length of legs segments: I 12.48 (3.87, 1.25, 3.12, 2.87, 1.37), II 12.77 (4.25, 1.12, 3.0, 3.0, l.37) III 8.75 (3.0, 0.75, 2.0, 2.25, 0.75), IV 13.37 (4.25, 1.12, 3.25, 3.75, 1.0). Leg formula 4213. Variation. Males (n=8) total length 4.37–6.3; carapace 1.6–2.8 long, 1.4–2.4 wide; clypeus height 0.23–0.33; chelicerae length 0.69–0.92. Length of legs segments: I 19.59–16.86 (4.12–5.8, 0.87–1.17, 1.01–3.33, 3.03–4.41, 1.56–2.15), II 10.52–11.11 (3.43–5.39, 0.78–1.17, 2.74–4.11, 2.5–4.31, 1.07–1.47), III 7.93–10.96 (2.62–3.62, 0.58– 0.88, 1.86–2.74, 2.12–2.35, 0.75–1.37), IV 12.67–17.81 (3.62–5.48, 0.62–1.07, 3.23–4.50, 3.5–5.29, 1.07–1.47). Eye sizes and interdistances: AME 0.12–0.16, PME 0.16–0.18, PLE 0.9–0.14, AME–PLE 0.9–0.16, AME–PME 0.13–0.16.