Bioacoustics of Lasiodora subcanens

Redescription. Male (IBSP 4758). Carapace 23.56 long, 22.55 wide, chelicera 11.20. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 23.96, 11.49, 19.63, 19.21, 10.50, 84.79. II: 22.41, 10.88, 18.03, 18.81, 9.88, 80.01. III: 20.19, 9.46, 16.62, 19.61, 9.02, 74.90. IV: 22.86, 10.19, 20.27, 26.84, 10.21, 90.37. Palp: 14.44, 8.24, 12.11, –, 5.04, 39.83. Midwidths: femora I–IV = 3.89, 4.34, 5.59, 4.15, palp = 3.05; patellae I–IV = 4.40, 4.33, 4.26, 4.24, palp = 3.50; tibiae I–IV = 3.58, 3.17, 3.31, 3.25, palp = 3.69; metatarsi I–IV = 2.21, 2.24, 2.33, 2.31; tarsi I–IV = 1.99, 1.84, 1.93, 1.85, palp = 3.39. Abdomen 23.52 long, 14.45 wide. Spinnerets: PMS, 2.76 long, 0.81 wide, 1.10 apart; PLS, 3.72 basal, 2.85 middle, 3.99 distal; midwidths 1.77, 1.45, 1.04, respectively. Carapace: 1.04 longer than wide; cephalic area moderately raised, thoracic striae conspicuous. Fovea: 2.89 wide. Eyes and eye tubercle: Tubercle 1.11 high, 2.28 long, 2.94 wide. Clypeus 0.52 wide. Anterior eye row procurved, posterior slightly recurved. Eye sizes and inter-distances: AME 0.58, ALE 0.80, PME 0.44, PLE 0.59, AME–AME 0.65, AME–ALE 0.36, AME–PME 0.21, ALE–ALE 1.89, ALE–PME 0.44, PME–PME 1.59, PME– PLE 0.14, PLE–PLE 2.16, ALE–PLE 0.37, AME–PLE 0.53. Eye group 2.83 wide, 1.50 long. Maxilla: Length 7.42, width 4.38. Cuspules: ca. 308 spread over ventral inner heel. Labium: 2.86 long, 3.81 wide, with ca. 103 cuspules spaced by ca. one diameter from each other on the anterior third center. Chelicera: basal segment with 11 teeth in row on promargin and denticles in basal area. Sternum: 10.39 long, 8.45 wide. Legs : leg formula: I = IV II III . Length leg IV to I: 1.06. Stridulatory apparatus: Retrolateral maxilla: small to large spiniform setae on distal upper, middle and lower areas, interspersed with some plumose setae ( Figs 171 ─172). Leg I prolateral coxa: confluence of sutures region with 6 brownish, elongated, somewhat spatulated stridulatory setae and several short ones (Figs 173─174). Region above sutures with plumose setae and some curved spiniform setae. Region below sutures covered with plumose setae having no incrassate base (Fig. 175). Coxa I retrolateral face covered with plumose setae and a group of small spiniform setae on upper region. Retrolateral face of coxae II─ III lacking spiniform setae. Coxa II prolateral face with same apparatus as in leg I; in legs III and IV , the stridulatory setae are very slender. Scopula : Tarsi I – IV fully scopulate. Metatarsi I ─II fully scopulated; III 1 /2, IV 1 /4 distal. Metatarsus IV divided by row of 3─4 setae. Spination: palp: femur p0-0-1, patella 0, tibia 0-1-0, p4-3-2; leg I: femur 0, patella 0, tibia v0-0-1ap, metatarsus v0-0-1ap; leg II: femur 0, patella 0, tibia v0-1-3ap, p0-1-0, metatarsus v0-0- 2ap; leg III : femur 0, patella 0, tibia v0-2-2ap, p1-2-1, r0-1-1, metatarsus v1-4-3ap, p0-1-1, r1-0-1; leg IV : femur 0, patella 0, tibia v1-5-3(1ap), p0-1-0, metatarsus v21(4ap), p0-1-1, r0-1-1. Urticating setae: Position, type and length range: MA, I, 0.31─0.36; LA, I, 0.37─0.42; MM , III , 0.69─0.74; LM, I, 0.40─0.43. MP and LP regions bald. Palp ( Figs 165 –167). Palpal bulb pyriform, embolus slightly shorter than tegulum length, slightly flattened laterally at distal region, apex short and thick. Prolateral keels present. PS forming embolus edge distally. A present, short. R present, sharp, with a series of denticles on its edge. SA present, well developed. Bifid tibial spur (Figs 168─169) with processes originating from common base, both straight, retrolateral longest and with a curvature at its distal portion. A single, flattened, rhomboidal spine contiguous to the internal upper face of retrolateral process, and three such spines at the internal face of prolateral process. Metatarsus I curved at its basal third, when folded touches apex of retrolateral process. Color pattern (in alcohol): Carapace, chelicerae and legs black. Carapace and chelicerae covered with a dense layer of whitish setae. Longer setae on legs whitish. Coxae of legs ventrally and sternum reddish brown, covered with short dark brown setae and longer brown scattered setae. Labium and maxillae reddish brown. Abdomen dorsally black, and ventrally dark brown with abundant long light brown setae. Femora, patellae, tibiae and metatarsi of legs and palp with conspicuous whitish stripes. Apex of leg segments with whitish rings on apex. Redescription. Female (MZUSP 27621). Carapace 28.26 long, 26.42 wide, chelicera 17.31. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 20.19, 12.63, 16.45, 15.11, 8.60, 72.98. II: 18.47, 11.44, 14.56, 14.26, 8.04, 66.77. III: 16.75, 10.05, 12.89, 14.74, 7.90, 62.33. IV: 19.80, 10.40, 15.92, 20.20, 8.39, 74.71. Palp: 14.99, 9.36, 11.23, –, 9.44, 45.02. Midwidths: femora I–IV = 4.38, 4.45, 5.20, 4.62, palp = 3.48; patellae I–IV = 4.68, 4.69, 4.58, 4.66, palp = 4.00; tibiae I–IV = 3.96, 3.83, 3.78, 3.73, palp = 3.37; metatarsi I–IV = 2.97, 2.81, 2.71, 2.70; tarsi I–IV = 2.75, 2.77, 2.77, 2.67, palp = 2.93. Abdomen 29.91 long, 25.12 wide. Spinnerets: PMS, 3.64 long, 1.31 wide, 1.66 apart; PLS, 4.34 basal, 3.27 middle, 4.91 distal; midwidths 2.15, 1.81, 1.32, respectively. Carapace: 1.07 longer than wide; cephalic area noticeably raised, thoracic striae deep. Fovea: 4.85 wide. Eyes and eye tubercle: Tubercle 1.10 high, 2.57 long, 3.69 wide. Clypeus 0.87 wide. Anterior eye row procurved, posterior slightly recurved. Eye sizes and inter-distances: AME 0.68, ALE 0.78, PME 0.37, PLE 0.73, AME–AME 0.61, AME–ALE 0.59, AME–PME 0.34, ALE–ALE 2.50, ALE–PME 0.59, PME–PME 1.90, PME–PLE 0.26, PLE–PLE 2.94, ALE–PLE 0.65, AME–PLE 0.91. Eye group 3.70 wide, 1.79 long. Maxillae: Length 8.60, width 5.88. Cuspules: ca. 365 spread over ventral inner heel. Labium: 3.74 long, 4.95 wide, with 223 cuspules spaced by ca. one diameter from each other on anterior third center. Chelicera: basal segment with 14 teeth in row on promargin and denticles in basal area. Sternum: 12.04 long, 10.49 wide. Legs: leg formula: I = IV II III. Length leg IV to I: 1.02. Stridulatory apparatus: Retrolateral maxilla: small to large spiniform setae on the distal upper, middle and lower areas, interspersed with some plumose setae ( Figs 176 ─177). Leg I prolateral coxa: confluence of sutures region with 6 brownish, elongated, somewhat spatulated stridulatory setae and several short ones (Figs178─179). Region above sutures with plumose setae and some curved spiniform setae. Region below sutures covered with plumose setae having no incrassate base (Fig. 180). Coxa I retrolateral face covered with plumose setae and a group of small spiniform setae on the upper region. Retrolateral face of coxae II─III lacking spiniform setae. Coxa II prolateral face with same apparatus as in coxa Il; in coxae III and IV, the stridulatory setae are very slender. Scopula: Tarsi I–IV fully scopulate. Metatarsi I–II fully scopulated; III 1/2, IV 1/3 distal. Metatarsus IV divided by row of 2–3 setae. Spination: palp: femur p0-0-1ap, patella 0, tibia v1-3-3ap, p1-1-1, r0-1-0; leg I: femur p0-0-1, patella 0, tibia v0-0-2ap, metatarsus v0-0-1ap; leg II: femur 0, patella 0, tibia v0-0-2ap, p0-1-1, metatarsus v1-0-3ap; leg III: femur 0, patella 0, tibia v0-2-2ap, p1-1-1, r0-1-0, metatarsus v6-0-4(3ap), p1-1-1, r0-1-0; leg IV: femur 0, patella 0, tibia v0-1-5(2ap), p0-1-1, r1-1-1, metatarsus v23(4ap), p0-1- 1, r0-1-1. Urticating setae: Position, type and length range: MA, I, 0.27–0.30; LA, I, 0.27–0.30; MM, I, 0.52–0.55, several intermediates between I and III; LM, I, 0.29–0.31; MP, only intermediates between I and III, 0.51–0.58; LP, I, 0.31–0.35. Spermathecae (Fig. 170): Two short spermathecae separated by heavily sclerotized short area, spermathecal stalk considerably narrower than spermathecal bulb. Color pattern: As in male.