Bioacoustics of Pterinopelma vitiosum

Redescription. Male MCN 7963. Carapace 10.55 long, 10.15 wide, chelicerae 4.46. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 10.72, 5.31, 8.13, 7.42, 4.85, 36.43. II: 9.82, 4.94, 7.38, 6.90, 4.49, 33.53. III: 8.17, 4.03, 5.98, 7.32, 4.93, 30.13. IV: 10.08, 4.42, 8.64, 10.69, 5.25, 39.08. Palp: 6.54, 3.61, 5.53, –, 2.29, 17.97. Midwidths: femora I–IV=2.11, 2.09, 2.30, 1.85, palp=1.3; patellae I–IV=2.09,1.80, 1.87, 1.72, palp=1.91; tibiae I– IV=1.7, 1.68, 1.50, 1.57, palp=2.03; metatarsi I–IV=1.26, 1.10, 1.30, 1.20 tarsi I–IV=1.14, 0.90, 1.05, 1.24, palp=1.28. Abdomen 12.60 long, 7.42 wide. Spinnerets: PMS, 1.53 long, 0.41 wide, 0.60 apart; PLS, 2.13 basal, 1.54 middle, 1.88 distal; midwidths 0.93, 0.70, 0.51, respectively. Carapace: length to width 1.04; cephalic area moderately raised, thoracic striae shallow. Fovea: shallow, straight, 1.52 wide. Carapace covered with short, slender, dense setae and bordered with stiff setae pointing out. Eyes and eye tubercle: tubercle 0.38 high, length 1.20, width 1.59. Clypeus 0.05 wide. Anterior row procurved, posterior slightly recurved. Sizes and inter-distances: AME 0.29, ALE 0.36, PME 0.16, PLE 0.31, AME–AME 0.27, AME–ALE 0.14, AME–PME 0.15, ALE–ALE 1.00, ALE–PME 0.21, PME–PME 0.78, PME–PLE 0.03, PLE–PLE 1,0 7, ALE–PLE 0.08, AME–PLE 0.30. Ratio of eye group width to length 1.97. Maxillae: length to width: 1.59. Cuspules: 100─150 spread over ventral inner heel. Lyra absent. Labium: length 2.02, width 2.11, with ca. 100 cuspules spaced by less than one diameter from each other on anterior third center. Labio-sternal groove shallow, flat, without visible sigilla. Chelicerae: rastellum absent, basal segments with 10 and 9 teeth on right and left side, respectively, both with series of basal denticles. Sternum (Fig. 5): length 5.00, width 5.11. Porterior angle rounded, not separating coxae IV. Sigilla: not visible. Legs: legs formulla: IV I II III. Clavate trichobothria: on distal 2/3 of tarsi I–IV. Leg coxae: with sparse soft setae; stridulatory or modified setae lacking. Scopula: Tarsi I–III fully scopulate. Tarsus IV divided by row of setae. Metatarsi I─ II 2 /3 scopulate; III 1 /2, IV ascopulate. Spines: palp: femur 0, patella 0, tibia p0-1-5(3ap); leg I: femur 0, patella 0, tibia p1-0-0; leg II: femur 0, patella 0, tibia v1-1 -3ap, p0-1-0; metatarsus v1-1 -3ap, p0-1-0 leg III: femur 0, patella 0, tibia p1-1-1, r1-1- 0, metatarsus p0-1-0, r0-0-1, leg IV: femur 0, patella 0, tibia v1-2 -3(2ap), p0-1-0, r1-1-0, metatarsus d0-0-1a, v2-3 - 4(3ap), p1-2-1, r1-2-2ap. Claws: ITC entirely absent; STC with small teeth. Urticating hairs: Type I with region "A" longer than region "B" on abdomen dorsum. Palp ( Figs 1 –3): palpal bulb pyriform, embolus long, slightly flattened laterally at distal region. Prolateral keels present. PS forming embolus edge distally. PI long, with series of unequal denticles on its basal and central areas. A present, short. R present, rounded. SA present, but inconspicuous. Tibial apophysis (Fig. 4) with two branches originating from common base, retrolateral longest, and with slight distal curvature; prolateral straight. Metatarsus I slightly curved, when folded touches retrolateral tibial apophysis branch laterally. Color pattern: Carapace dark brown with light brown hairs on its border. Coxae, labium, sternum and maxila dark brown. Legs dark brown with light brown long setae. Leg rings and stripes inconspicuous. Abdomen dorsally black with light brown long setae, ventrally black. Individual MCN 17732 MCN 7963 MCN 22145 Sex Female Male Male Sternum length Sternum width 5.53 5.72 5.00 5.11 6.85 6.62 Sternum length / width 0.97 0.98 1.03 MCN 22102 MCN 17731 Female Female 6.73 7.20 6.09 5.96 0.93 1.02 MCN 7943 MCP 1520 Male Male 5.35 5.50 6.38 6.58 Median 0.97 0.97 0.98 SD 0.033 Description. Female. MCN 17732. Carapace 11.01 long, 10.16 wide, chelicerae 4.32. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 9.04, 5.41, 6.56, 4.86, 3.90, 29.77. II: 7.75, 4.73, 5.53, 4.90, 3.78, 26.69. III: 6.92, 4.04, 4.77, 4.59, 3.47, 23.79. IV: 8.85, 4.46, 6.89, 7.60, 3.84, 31.64. Palp: 6.95, 3.90, 4.81, –, 4.25, 19.91. Midwidths: femora I–IV=1.67, 1.47, 1.56, 1.05, palp=1.32; patellae I–IV=2.0, 1.92, 1.75, 1.64, palp=1.81; tibiae I– IV=1.76, 1.64, 1.48, 1.44, palp=1.60; metatarsi I–IV=1.65, 1.48, 1.25, 1.08; tarsi I–IV=1.60, 1.41, 1.17,1.28, palp=1.55. Abdomen 12.62 long, 9.98 wide. Spinnerets: PMS, 2.21 long, 0.80 wide, 0.8 apart; PLS, 2.44 basal, 1.45 middle, 1.89 distal; midwidths 1.07, 0.82, 0.58, respectively. As in male, except: Carapace: length to width 1.08; cephalic area raised, thoracic striae deep. Fovea: shallow, straight, 1.85 wide. Carapace with soft long setae pointing out. Eyes and eye tubercle: tubercle 0.38 high, length 1.35, width 2.01. Clypeus absent. Sizes and inter-distances: AME 0.25, ALE 0.52, PME 0.18, PLE 0.29, AME–AME 0.28, AME–ALE 0.26, AME–PME 0.19, ALE–ALE 0.98, ALE–PME 0.65, PME–PME 0.93, PME–PLE 0.40, PLE–PLE 1.23, ALE–PLE 0.17, AME–PLE 0.46. Ratio of eye group width to length 1.85. Maxillae: length to width: 1.39. Cuspules: 100─200 spread over ventral inner heel. Labium: length 1.83, width 2.62. Sternum: length 5.53 width 5.72. Legs: Scopula: Tarsi I–III fully scopulate, IV divided by a row of 4-5 setae. Metatarsi I–II 4 /5 scopulate; III 1 / 2, IV 1 /4 distal scopulate. IV not divided by row of setae. Spines: palp: femur p0-0-1, patella 0, tibia v1-2 -2ap, p1- 2-2; leg I: femur p0-0-1, patella 0, tibia v0-0-1ap, metatarsus v0-0-1ap; leg II: femur p0-0-1, patella 0, tibia v0-1-0, p-1-1-1; metatarsus v1 -0-3ap, p0-1-0; leg III: femur r0-0-1, patella 0, tibia v0-1-2ap, p1-1-1, r1-1-1, metatarsus v1- 2 -3ap, p1-1-1, r0-1-2; leg IV: femur 0, patella 0, tibia v0-1-2ap, r0-0-2, metatarsus v2-4 -6(3ap), p0-0-1, r0-3-3. Genitalia: Two short spermathecae separated by heavily sclerotized short area, spermathecal stalk narrower than spermathecal bulb (Fig. 6). Color: Abdomen ventrally brown.

Carapace: length to width 1.04; cephalic area moderately raised, thoracic striae shallow. Fovea: shallow, straight, 1.52 wide. Carapace covered with short, slender, dense setae and bordered with stiff setae pointing out. Eyes and eye tubercle: tubercle 0.38 high, length 1.20, width 1.59. Clypeus 0.05 wide. Anterior row procurved, posterior slightly recurved. Sizes and inter-distances: AME 0.29, ALE 0.36, PME 0.16, PLE 0.31, AME-AME 0.27, AME-ALE 0.14, AME-PME 0.15, ALE-ALE 1.00, ALE-PME 0.21, PME-PME 0.78, PME-PLE 0.03, PLE-PLE 1,07, ALE-PLE 0.08, AME-PLE 0.30. Ratio of eye group width to length 1.97. Maxillae: length to width: 1.59. Cuspules: 100-150 spread over ventral inner heel. Lyra absent. Labium: length 2.02, width 2.11, with ca. 100 cuspules spaced by less than one diameter from each other on anterior third center. Labio-sternal groove shallow, flat, without visible sigilla. Chelicerae: rastellum absent, basal segments with 10 and 9 teeth on right and left side, respectively, both with series of basal denticles. Sternum (Fig. 5): length 5.00, width 5.11. Porterior angle rounded, not separating coxae IV. Sigilla: not visible. Legs: legs formulla: IV I II III. Clavate trichobothria: on distal 2/3 of tarsi I-IV. Leg coxae: with sparse soft setae; stridulatory or modified setae lacking. Scopula: Tarsi I-III fully scopulate. Tarsus IV divided by row of setae. Metatarsi I- II 2 /3 scopulate; III 1 /2, IV ascopulate. Spines: palp: femur 0, patella 0, tibia p0-1-5(3ap); leg I: femur 0, patella 0, tibia p1-0-0; leg II: femur 0, patella 0, tibia v1-1 -3ap, p0-1-0; metatarsus v1-1 -3ap, p0-1-0 leg III: femur 0, patella 0, tibia p1-1-1, r1-1- 0, metatarsus p0-1-0, r0-0-1, leg IV: femur 0, patella 0, tibia v1-2 -3(2ap), p0-1-0, r1-1-0, metatarsus d0-0-1a, v2-3 - 4(3ap), p1-2-1, r1-2-2ap. Claws: ITC entirely absent; STC with small teeth. Urticating hairs: Type I with region "A" longer than region "B" on abdomen dorsum. Palp (Figs 1-3): palpal bulb pyriform, embolus long, slightly flattened laterally at distal region. Prolateral keels present. PS forming embolus edge distally. PI long, with series of unequal denticles on its basal and central areas. A present, short. R present, rounded. SA present, but inconspicuous. Tibial apophysis (Fig. 4) with two branches originating from common base, retrolateral longest, and with slight distal curvature; prolateral straight. Metatarsus I slightly curved, when folded touches retrolateral tibial apophysis branch laterally. Color pattern: Carapace dark brown with light brown hairs on its border. Coxae, labium, sternum and maxila dark brown. Legs dark brown with light brown long setae. Leg rings and stripes inconspicuous. Abdomen dorsally black with light brown long setae, ventrally black. - - - - - - MCN 17732 Female 5.53 5.72 0.97 MCN 7963 Male 5.00 5.11 0.98 MCN 22145 Male 6.85 6.62 1.03 MCN 22102 Female 6.73 7.20 0.93 MCN 17731 Female 6.09 5.96 1.02 MCN 7943 Male 5.35 5.50 0.97 MCP 1520 Male 6.38 6.58 0.97 - - - Median 0.98 - - - SD 0.033 Description. Female. MCN 17732. Carapace 11.01 long, 10.16 wide, chelicerae 4.32. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 9.04, 5.41, 6.56, 4.86, 3.90, 29.77. II: 7.75, 4.73, 5.53, 4.90, 3.78, 26.69. III: 6.92, 4.04, 4.77, 4.59, 3.47, 23.79. IV: 8.85, 4.46, 6.89, 7.60, 3.84, 31.64. Palp: 6.95, 3.90, 4.81, -, 4.25, 19.91. Midwidths: femora I-IV=1.67, 1.47, 1.56, 1.05, palp=1.32; patellae I-IV=2.0, 1.92, 1.75, 1.64, palp=1.81; tibiae I-IV =1.76, 1.64, 1.48, 1.44, palp=1.60; metatarsi I-IV=1.65, 1.48, 1.25, 1.08; tarsi I-IV=1.60, 1.41, 1.17,1.28, palp=1.55. Abdomen 12.62 long, 9.98 wide. Spinnerets: PMS, 2.21 long, 0.80 wide, 0.8 apart; PLS, 2.44 basal, 1.45 middle, 1.89 distal; midwidths 1.07, 0.82, 0.58, respectively. As in male, except: Carapace: length to width 1.08; cephalic area raised, thoracic striae deep. Fovea: shallow, straight, 1.85 wide. Carapace with soft long setae pointing out. Eyes and eye tubercle: tubercle 0.38 high, length 1.35, width 2.01. Clypeus absent. Sizes and inter-distances: AME 0.25, ALE 0.52, PME 0.18, PLE 0.29, AME-AME 0.28, AME-ALE 0.26, AME-PME 0.19, ALE-ALE 0.98, ALE-PME 0.65, PME-PME 0.93, PME-PLE 0.40, PLE-PLE 1.23, ALE-PLE 0.17, AME-PLE 0.46. Ratio of eye group width to length 1.85. Maxillae: length to width: 1.39. Cuspules: 10^-200 spread over ventral inner heel. Labium: length 1.83, width 2.62. Sternum: length 5.53 width 5.72. Legs: Scopula: Tarsi I-III fully scopulate, IV divided by a row of 4-5 setae. Metatarsi I-II 4/5 scopulate; III 1 / 2, IV 1 /4 distal scopulate. IV not divided by row of setae. Spines: palp: femur p0-0-1, patella 0, tibia v1-2 -2ap, p1- 2-2; leg I: femur p0-0-1, patella 0, tibia v0-0-1ap, metatarsus v0-0-1ap; leg II: femur p0-0-1, patella 0, tibia v0-1-0, p-1-1-1; metatarsus v1 -0-3ap, p0-1-0; leg III: femur r0-0-1, patella 0, tibia v0-1-2ap, p1-1-1, r1-1-1, metatarsus v1- 2 -3ap, p1-1-1, r0-1-2; leg IV: femur 0, patella 0, tibia v0-1-2ap, r0-0-2, metatarsus v2-4 -6(3ap), p0-0-1, r0-3-3. Genitalia: Two short spermathecae separated by heavily sclerotized short area, spermathecal stalk narrower than spermathecal bulb (Fig. 6). Color: Abdomen ventrally brown.