Bioacoustics of Canariphantes acoreensis

Description. Male (from Terceira). Total length 2.4. Prosoma 1.0 long, 0.8 wide. All eyes except AME equal in size, large, AME small, posterior row slightly recurved, anterior row recurved. PME separated by half their diameter, separated from PLE by less than half their diameter. PLE touching ALE. ALE separated from AME by half the diameter of the former. AME separated by less than half their diameter. AME separated from PME by the diameter of the latter. Clypeus height ca. two AME diameters. Chelicerae with roughly 20 stridulatory striae, 3 promarginal teeth and 4 retromarginal denticles. Prosoma yellow. Sternum anteriorly truncated, roughly triangular, black. Opisthosoma whitish with a dorsal pattern of black chevrons ( Fig. 23 ). Legs with a prolateral spine in femur I; all patellae with 1 dorsal spine; tibiae I and IV with 2 dorsal, 1 prolateral and 1 retrolateral spine, tibiae II and III with 2 dorsal and 1 prolateral spine. Metatarsi with 1 dorsal spine. TmI 0.16. TmIV absent. L Sp Ti I 5 , L Sp Ti IV 5.8. Legs uniformly dark yellow. Palp ( Figs. 1–4 ). Patella with 1 dorsal spine, 3 times longer than diameter of patella. Tibia slightly longer than wide, with 1 dorsal spine, as long as diameter of tibia. Tibial spine roughly half the length of patellar spine. Three tibial trichobotria present, 2 retrolateral, 1 dorsal. Cymbium with a retrolateral keel. Paracymbium simple, with an incised tip, the inner tooth larger than the outer, with 6 to 7 hairs scattered from the basal to the median section. Suprategular apophysis hookshaped in ventral view, directed anteriorly in retrolateral view, with a small sclerotized dorsal arch close to the column opening. Lamella characteristica simple, with an incised distal part. Embolic division with a terminal apophysis with several apical, small, digitiform processes. Lamella characteristica and terminal apophysis separated by a membranous area bearing two small teeth, which can be variable in size. Radix unsclerotized, with a short, pointed tailpiece. Median membrane laminar. Embolus with a lobed thumb extending retrolaterally and dorsally. Fickert’s gland absent ( contra Wunderlich 1992 ). Female (from Terceira). Total length 2.8. Prosoma 1.3 long, 1.0 wide. Eyes same as in male. Clypeus height ca. three AME diameters. Chelicerae with roughly 20 stridulatory striae, 3 promarginal teeth and 5 retromarginal denticles. Prosoma same color as in male. Sternum as in male. Opisthosoma with a dorsal pattern of black chevrons, these are more diffuse than those of males and sometimes only interspersed white patches appear in a black opisthosoma ( Fig. 24 ). Leg spination and coloration as in male. L Sp Ti I 3.6, L Sp Ti IV 4.7. Epigynum ( Figs. 5–7 ). Proximal part of scape short, wide and rounded, directly passing into distal part, with a total reduction or merging of the median part of scape; distal part of scape reduced, lateral lobes and stretcher very short ( Figs. 5–7 ). Posterior median plate not visible in ventral view, heart-shaped in dorsal view. Entrance grooves not coiled, proceeding from the distal part of scape into the proximal part of scape and almost directly into the oval receptacula. Femur Patella Tibia Metatarsus Tarsus Total I 1.7 (1.5–1.8) 0.4 (0.3–0.4) 1.8 (1.8–1.9) 2.0 (1.9–2.1) 1.1 (1.1–1.2) 7.0 (6.8–7.3) II 1.6 (1.5–1.8) 0.3 (0.3–0.4) 1.6 (1.4–1.7) 1.7 (1.6–1.8) 1.0 (0.9–1.0) 6.1 (5.6–6.3) III 1.3 (1.2–1.5) 0.3 (0.3–0.3) 1.2 (1.2–1.4) 1.4 (1.3–1.4) 0.8 (0.8–0.8) 5.0 (4.8–5.3) IV 1.6 (1.5–1.8) 0.3 (0.3–0.3) 1.7 (1.6–1.9) 1.7 (1.6–1.9) 0.9 (0.7–1.0) 6.0 (5.6–6.6) Femur Patella Tibia Metatarsus Tarsus Total I 2.0 (1.9–2.1) 0.4 (0.4–0.5) 2.0 (1.9–2.2) 2.1 (1.9–2.3) 1.2 (1.1–1.3) 7.7 (7.2–8.3) II 1.9 (1.8–2.0) 0.4 (0.4–0.4) 1.9 (1.8–2.0) 1.9 (1.9–2.0) 1.1 (1.1–1.2) 7.4 (7.1–7.6) III 1.6 (1.5–1.8) 0.4 (0.4–0.4) 1.4 (1.3–1.4) 1.5 (1.3–1.6) 0.8 (0.8–0.8) 5.6 (5.2–5.8) IV 2.0 (1.8–2.1) 0.4 (0.4–0.4) 1.8 (1.7–1.8) 1.4 (1.3–1.5) 1.1 (1.0–1.1) 7.2 (6.6–7.2) Variation. Total body size in male varies from 1.9 to 2.5, in female from 2.8 to 3.1. Prosoma length from 0.9 to 1.1 in male, from 1.2 to 1.4 in female. Prosoma width in female varies from 0.9 to 1.1. Some female specimens present 2 prolateral spines in Femur I.