Bioacoustics of Diguetia dialectica

Description. Male (CARCIB-Ar 04633). Coloration : carapace dark yellow with sparse black setae, and with two bands of white setae, which run from the ocular area and converge at the inconspicuous fovea, eyes with black rings. Carapace margins, clypeus, and sides next to coxae with white setae (scales) ( Fig. 30 ). Endites yellow with sparse white setae and margins darker. Labium dark yellow and sternum dark brown, both with sparse white setae, and sternum with margins dark ( Fig. 32 ). Legs I–II dark yellow without rings, Fm II darker distally, and Pt II darker. Legs III–IV light yellow, Fm III–IV, Ti III–IV and Mt III–IV with a distal ring, Pt III–IV darker, Ti III–IV with a submedian diffuse ring (arrow in Fig. 54 ). Dorsum and sides of opisthosoma grey, covered with white setae, and sparse dark setae, dorsum with a longitudinal dark band, broadened posteriorly with a wavy margin and bordered with thin bands of white setae ( Fig. 31 ). Venter of opisthosoma dark grey with sparse white setae, epigastric area, and spinnerets darker ( Fig. 33 ). Habitus : carapace suboval, cephalic region narrower than thoracic. The stridulatory file of chelicerae occupies almost all lateral face. Promargin of chelicerae with a transparent lamina and one tooth; retromargin with two teeth. Labium, endites and sternum longer than wide. Ta and Mt without scopula. Ta I with capsulate tarsal organ and slit sensilla ( Fig. 50 ), paired claws pectinate with 10 teeth. Opisthosoma with a small caudal extension (arrow in Figs 31, 33 ). Palp : Fm with three ventrolateral stridulating pins, Ta with two finger-like processes, the prolateral one shorter ( Fig. 40 ), the suboval bulb narrows apically (0.9 long, 0.4 wide; Figs 42–45 , arrow pointing small bulge of bulb), with spoon-shaped embolus (0.46 long) with the tip bent and flattened ( Figs 41 , 46 ), and a straight tubular prong slightly wider at the tip ( Figs 40, 42–43, 45 ), almost half-length of embolus (0.20 long), small bulge near Bp (blue arrow in Figs 42–43, 45 ). Measurements : total length 4.7; carapace 2.3 long, 1.3 wide; clypeus height 0.2; chelicerae length 0.7. Eye sizes and interdistances: AME 0.12, ALE 0.14, PME 0.14; AME–ALE 0.1, AME–PME 0.18. Length of legs segments: I 14.2 (4.5, 0.9, 0.4, 3.2, 1.6), II 12.6 (3.8, 0.9, 3.3, 3.3, l.3), III 8.8 (3.0, 0.5, 2.2, 2.4, 0.7), IV 13.4 (4.3, 0.8, 3.4, 3.8, 1.1). Leg formula 1423. Female (CARCIB-Ar 04634). Coloration as the male but prosoma slightly darker ( Figs 34–37 ) and the median ring on Ti III–IV indistinct ( Fig. 55 ); metatarsal lyriform organ with six slits ( Fig. 49 ). External genitalia : semicircle anterior sclerotization larger than posterior, which is a small strip ( Fig. 38 ). Internal genitalia: two anterior oval pore plates, a membranous median sac, which is as long as wide, lies dorsally to the wide uterus externus ( Figs 39 , 47–48 ). Measurements : total length 9.11; carapace 3.5 long, 2.4 wide; clypeus height 0.4; chelicerae length 0.8. Eye sizes and interdistances: AME 0.12, ALE 0.12, PME 0.14; AME–ALE 0.14, AME–PME 0.24. Length of legs segments: I 11.6 (3.7, 1.0, 3.0, 2.6, 1.3), II 10.0 (3.1, 0.9, 2.5, 2.5, l.0), III 7.6 (4.0, 0.8, 1.6, 1.9, 0.9), IV 11.1 (3.6, 0.9, 2.6, 3.1, 0.9). Variation. Some males with lighter legs, and some females with median ring on Ti III–IV indistinct. Males (n=4) total length: 4.4–6.0; carapace 1.8–2.8 long, 1.0–2.0 wide; clypeus height 0.2–0.3; chelicerae length 0.6–0.7. Length of legs segments: I 9.9−15.2 (3.2–4.9, 0.5–1.0, 2.8–4.1, 2.4–3.5, 1.0–1.7), II 8.9−13.4 (2.8–4.2, 0.5–0.8, 2.3–3.6, 2.3–3.5, 1.0–1.3), III 6.4−9.4 (2.0 –3.1, 0.5–0.7, 1.4–2.0, 1.8–2.6, 0.7–1.0), IV 9.4−14.7 (3.0–4.6, 0.5–0.8, 2.3–3.8, 2.7–4.3, 0.9–1.2). Eye sizes and interdistances: AME 0.16, PME 0.16, PLE 0.9–0.13, AME–PLE 0.9–0.13, AME–PME 0.16–0.19. Females (n=10) total length 6.5–9.3; carapace 2.5–3.4 long, 1.5–2.3 wide; clypeus height 0.3–0.5; chelicerae length 0.8–1.0. Length of legs segments: I 10.4−12.7 (3.4–4.0, 0.9–1.1, 2.7–3.3, 2.4–3.0, 1.0– 1.3), II 9.4−10.5 (3.0–3.1, 1.0, 2.2–2.6, 2.2–2.6, 1.0–1.2); III 7.0−8.0 (2.3–2.9, 0.6–0.9, 1.4–1.6, 2.0, 0.5–0.8), IV 9.8−11.4 (3.3–3.4, 0.8–1.0, 2.3–3.0, 2.5–3.0, 0.9–1.0). AME 0.16, PME 0.16, ALE 0.13–0.16, AME–ALE 0.16, AME–PME 0.16–0.23.