Bioacoustics of Lasiodora franciscana

Description. Male (IBSP 8622). Carapace 21.29 long, 19.85 wide, chelicera 10.41. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 20.14, 9.98, 15.45, 15.94, 8.79, 70.30. II: 18.53, 9.49, 14.15, 14.11, 8.23, 64.51. III: 16.28, 8.63, 12.55, 15.65, 7.78, 60.89. IV: 19.78, 8.97, 15.63, 21.70, 8.72, 74.80. Palp: 12.86, 7.20, 10.59, –, 4.55, 35.20. Midwidths: femora I–IV = 3.89, 3.76, 5.04, 3.77, palp = 2.84; patellae I–IV = 4.03, 3.81, 4.01, 3.95, palp = 3.04; tibiae I–IV = 3.37, 2.84, 3.29, 2.95, palp = 3.40; metatarsi I–IV = 1.89, 1.87, 1.90, 1.81; tarsi I–IV = 1.75, 1.68, 1.59, 1.62, palp = 2.85. Abdomen 19.60 long, 14.62 wide. Spinnerets: PMS, 2.19 long, 0.93 wide, 0.56 apart; PLS, 3.06 basal, 2.63 middle, 4.15 distal; midwidths 1.36, 1.11, 0.83, respectively. Carapace: 1.07 longer than wide; cephalic area moderately raised, thoracic striae conspicuous. Fovea 3.57 wide. Eyes and eye tubercle: Tubercle 0.91 high, 2.06 long, 2.69 wide. Clypeus 0.54 wide. Anterior eye row procurved, posterior slightly recurved. Eye sizes and inter-distances: AME 0.61, ALE 0.70, PME 0.42, PLE 0.60, AME–AME 0.45, AME–ALE 0.40, AME–PME 0.17, ALE–ALE 1.89, ALE–PME 0.53, PME–PME 1.34, PME–PLE 0.17, PLE–PLE 2.00, ALE–PLE 0.32, AME– PLE 0.62. Eye group 2.70 wide, 1.44 long. Maxilla: Length 6.26, width 3.81. Cuspules: ca. 257 spread over ventral inner heel. Labium: 2.73 long, 3.76 wide, with ca. 104 cuspules spaced by ca. one diameter from each other on the anterior third center. Chelicerae: basal segment with 14 teeth in row on promargin and denticles in basal area. Sternum: 8.96 long, 8.14 wide. Legs: leg formula: I = IV II III. Length leg IV to I: 1.06. Stridulatory apparatus: Retrolateral maxilla: a few inconspicuous spiniform setae on upper basal area, interspersed with plumose setae, middle and lower areas lacking spiniform setae ( Figs 261 ─262). Leg I prolateral coxa: confluence of sutures region with several reddish, acicular stridulatory setae (Figs 263─264). Region above sutures with plumose setae and some curved spiniform setae. Region below sutures covered mostly by plumose setae having no incrassate base and a few setae with slightly incrassate base (Fig. 265). Retrolateral face of coxae I─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 1/3 distal. Metatarsus IV divided by row of 2–3 setae. Spination: palp: femur p0-0-1, patella 0, tibia v1-1-0, p3-2-1; leg I: femur p0-0-1, patella 0, tibia v2-0-1ap, p0-1-0, metatarsus 0; leg II: femur p0-0-1, patella 0, tibia v2-1-3ap, p0-1-1, metatarsus v0-1-1; leg III: femur p0-0-1, r0-0-1, patella 0, tibia v1-2-2ap, p1-1-1, r1-1-1, metatarsus v2-2-2ap, p1-1-1, r1-0-1; leg IV: femur r0-0-1, patella 0, tibia v0-2-7(3ap), p1- 1-2, r1-1-1, metatarsus v18(3ap), p0-1-1, r1-1-1. Urticating setae: Position, type and length range: MA, I, 0.34–0.41; LA, I, 0.41–0.48; MM, III, 0.65–0.70, some of type I, 0.55–0.59; LM, I, 0.50–0.56; MP, III, 0.78–0.83; LP, III, 0.72–0.84. Palp ( Figs 255 –257). 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 short. R sharp, pronounced posteriorly, with a series of conspicuous denticles on its edge. SA well developed. Bifid tibial spur (Figs 258─259) 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 four such spines at the internal face of prolateral process (Figs 258─259). Metatarsus I curved at its basal third, when folded touches apex of retrolateral process. Color pattern (in alcohol): Carapace and chelicerae black. Carapace bordered with scattered light brown long setae, chelicerae with some long light brown setae. Legs black with sparse light brown long setae. Coxae of legs ventrally and sternum reddish brown, covered with short dark brown setae. Labium and maxillae reddish brown. Abdomen black with abundant long reddish setae. Femora, patellae, tibiae and metatarsi of legs and palp with discrete light stripes. Apex of leg segments with discrete whitish rings on apex. Description. Female (IBSP 4865C). Carapace 27.15 long, 24.76 wide, chelicera 15.16. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 20.05, 11.75, 14.58, 13.34, 8.01, 67.73. II: 17.99, 10.72, 12.20, 12.71, 6.90, 60.52. III: 16.16, 10.18, 11.07, 13.78, 7.24, 58.43. IV: 19.78, 10.13, 14.52, 18.73, 7.58, 70.74. Palp: 14.31, 8.74, 10.16, –, 8.67, 41.88. Midwidths: femora I–IV = 4.56, 4.56, 5.45, 4.34, palp = 3.52; patellae I–IV = 4.76, 4.83, 4.68, 4.60, palp = 4.08; tibiae I–IV = 4.14, 3.78, 3.95, 3.58, palp = 3.36; metatarsi I–IV = 2.94, 2.62, 2.60, 2.37; tarsi I–IV = 2.71, 3.05, 2.75, 2.90, palp = 2.85. Abdomen 31.81 long, 21.14 wide. Spinnerets: PMS 2.95 long, 1.46 wide, 1.26 apart; PLS, 5.08 basal, 3.67 middle, 5.24 distal; midwidths 2.13, 1.95, 1.33, respectively. Carapace: 1.10 longer than wide; cephalic area noticeably raised, thoracic striae conspicuous. Fovea: 4.49 wide. Eyes and eye tubercle: Tubercle 1.09 high, 2.61 long, 3.37 wide. Clypeus 0.64 wide. Anterior eye row procurved, posterior slightly recurved. Sizes and inter-distances: AME 0.68, ALE 0.73, PME 0.54, PLE 0.64, AME–AME 0.68, AME–ALE 0.54, AME–PME 0.30, ALE–ALE 2.51, ALE–PME 0.60, PME–PME 1.71, PME–PLE 0.12, PLE–PLE 2.43, ALE–PLE 0.52, AME–PLE 0.79. Eye group 3.32 wide, 1.73 long. Maxilla: Length 8.37, width 5.87. Cuspules: ca. 278 spread over ventral inner heel. Labium 3.75 long, 5.29 wide, with 139 cuspules spaced by ca. one diameter from each other on the anterior third center. Chelicera: basal segment with 12 teeth in row on promargin and denticles on basal area. Sternum: 11.87 long, 10.75 wide. Legs: leg formula: I = IV II III. Length leg IV to I: 1.04. Stridulatory apparatus: Retrolateral maxilla: a few inconspicuous spiniform setae on distal upper area, interspersed with plumose setae, middle and lower areas lacking spiniform setae ( Figs 266 ─267). Leg I prolateral coxa: confluence of sutures region with several reddish, acicular stridulatory setae (Figs 268─269). Region above sutures with plumose setae and some curved spiniform setae. Region below sutures covered with plumose setae having slightly incrassate base (Fig. 270). 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 1/3 distal. Metatarsus IV divided by row of 3–4 setae. Spination: palp: femur p0-0-1ap, patella 0, tibia v1-1-3ap, p0-1-0; leg I: femur 0, patella 0, tibia v0-1-2ap, metatarsus v0-0-1ap; leg II: femur p0-0-1, patella 0, tibia v0-1-1ap, p0-1-0; metatarsus v1-0-2ap; leg III: femur r0-0-1, patella 0, tibia v1-2-2ap, p1-1-1, r1-1-1, metatarsus v4-1-4ap, p1-0-1, r0- 1-1; leg IV: femur r0-0-1, patella 0, tibia v0-1-4ap, p0-1-0, r0-1-1, metatarsus v21(4ap), p0-1-0, r0-1-1. Urticating setae: Position, type and length range: MA, I, 0.28–0.31; LA, I, 0.31–0.32; MM, III, 0.67–0.70; LM, I, 0.40–0.46, III 0.58–0.65, several intermediates between I and III; MP, III, 0.66–0.75; LP, I, 0.41–0.50, III, 0.57–0.68. Spermathecae (Fig. 260): Two very short spermathecae separated by heavily sclerotized short area, spermathecal stalk slightly narrower than somewhat square spermathecal bulb. Color pattern (in alcohol): As in male.