Bioacoustics of Psalmopoeus reduncus

Redescription. Male ( CASENT 9071244). Total length, not including chelicerae or spinnerets 25.69. Carapace 13.44 long, 11.17 wide, 6.75 high. Chelicera: 6.94 long. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 15.58, 7.38, 13.04, 10.94, 6.36, 53.30; II: 13.55, 6.90, 11.13, 10.15, 5.85, 47.58; III: 11.49, 5.87, 9.42, 10.56, 5.48, 42.82; IV: 14.11, 6.16, 12.48, 13.73, 5.20, 52.04; Palp: 9.13, 4.95, 7.77, -, 2.84, 24.69. Midwidths: femora I–IV= 2.58, 1.92, 1.74, 2.03, palp= 1.99; patellae I–IV= 2.50, 2.26, 2.16, 2.21; palp= 1.73; tibiae I–IV= 1.90, 1.81, 1.64, 1.69, palp= 1.74; metatarsi I–IV= 1.46, 1.37, 1.20, 1.08; tarsi I–IV= 1.48, 1.35, 1.27, 1.09, palp= 1.80. Abdomen: 11.69 long, 7.81 wide. Spinnerets: PMS, 1.41 long, 0.60 wide, 0.58 apart; PLS, 2.63 basal, 1.35 middle, 2.55 distal; midwidths 1.04, 0.84, 0.71, respectively. Carapace: 1.20 times longer than wide; cephalic region slightly raised, thoracic striae conspicuous. Fovea: deep, straight, 1.68 wide. Eyes: eye tubercle 1.14 high, 1.85 long, 3.00 wide. Clypeus: absent. Anterior eye row straight, posterior slightly recurved. Eye size and interdistances: AME 0.68, ALE 0.67, PME 0.47, PLE 0.69, AME–AME 0.43, AME–ALE 0.23, AME–PME 0.23, ALE–ALE 2.07, ALE–PME 0.45, PME–PME 1.60, PME–PLE 0.20, PLE–PLE 2.08, ALE–PLE 0.28. Maxilla: length to width 1.69. Cuspules: ca. 154 spread over inner heel. Labium: 2.19 long, 1.89 wide, with ca. 124 cuspules spaced by one diameter from each other on anterior third. Chelicera: basal segment with 11 teeth in row. Short and ordered coverage setae densely grouped on the retrolateral side of the chelicera. Strikers: lines of 6–7 spaced filiform setae, disposed on a ventral-basal portion of chelicerae before the teeth row ( Fig. 193 ). Sternum: 6.80 long, 5.42 wide. Legs: Formula: I = IV II III. Length leg IV to leg I: 0.98. Scopula: Tarsi I–IV fully scopulate; IV with a few sparse setae. Metatarsi I–II fully scopulate; III 2/3 distal; IV 1/3 distal. IV divided by setae. Spination: Palp and legs (ventral apical: tibia/metatarsi): Palp 0; I: 1 behind retrolateral process; II: 2/0; III 0/2; IV 1/2. Maxilla stridulatory organ: composed of 10–12 thick setae forming a straight crescent line, setae increase in size from the internal to external side of maxillae; longest ones flattened laterally, tips of setae with rugous texture, 7 slender setae after thickest ones ( Fig. 192 ). Short and ordered coverage setae densely grouped on the retrolateral side of the maxillae/coxae, trochanter, proximal part of palp femur and prolateral side of the same articles of leg I. Tibial apophysis ( Figs 187–189 ): two processes, retrolateral longer than prolateral, one spine at side of prolateral, one at apical part of retrolateral process. A small rounded protuberance behind retrolateral process. Metatarsus I folds on retrolateral side of tibial apophysis. Palp ( Figs 183–186 ): tegulum length 1.50, width 1.99, embolus proximal width 0.71, embolus length 3.40. Embolus proximal portion straight. Embolus distal third curves gently to retrolateral side. Embolus tapers to its tip ending in a curved tip. Embolus length to tegulum width: 2.27. Color pattern (preserved in alcohol): Carapace, legs, palpal femora, and tibiae light brown, abdomen brown. Redescription. Female (CASENT 971243). Total length, not including chelicerae or spinnerets 37.26. Carapace 17.21 long, 15.19 wide, 9.71 high. Chelicera: 8.51 long. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 12.91, 8.57, 10.53, 9.73, 5.93, 47.67; II: 11.73, 7.98, 9.92, 9.53, 5.57, 44.73; III: 10.34, 6.64, 8.41, 9.10, 5.19, 39.68; IV: 13.17, 7.48, 11.36, 11.86, 5.23, 49.1; Palp: 9.19, 5.79, 6.78, -, 7.60, 29.36. Midwidths: femora I–IV= 3.42, 3.18, 3.26, 2.70, palp= 2.63; patellae I–IV= 3.58, 3.12, 3.17, 2.94, palp= 2.63; tibiae I–IV= 3.10, 2.75, 2.63, 2.58, palp= 2.65; metatarsi I–IV= 2.63, 2.29, 1.77, 1.84; tarsi I–IV= 2.15, 2.05, 1.97, 1.96, palp= 2.40. Abdomen: 19.18 long, 11.61 wide. Spinnerets: PMS, 1.99 long, 0.80 wide, 1.11 apart; PLS, 2.67 basal, 1.92 middle, 3.37 distal; midwidths 1.41, 1.43, 1.02, respectively. Carapace: 1.13 times longer than wide; cephalic region slightly raised, thoracic striae conspicuous. Fovea: deep, straight, 2.97 wide. Eyes: eye tubercle 0.81 high, 2.44 long, 3.74 wide. Clypeus: absent. Anterior eye row straight, posterior slightly recurved. Eye size and interdistances: AME 0.85, ALE 0.94, PME 0.64, PLE 0.65, AME–AME 0.60, AME–ALE 0.30, AME–PME 0.19, ALE–ALE 2.57, ALE–PME 0.52, PME–PME 2.11, PME–PLE 0.24, PLE–PLE 2.90, ALE–PLE 0.36. Maxilla: length to width 1.45. Cuspules: ca. 159 spread over ventral inner heel. Labium: 2.39 long, 3.11 wide, with ca. 137 cuspules spaced by one diameter from each other on anterior third. Chelicera: basal segment with 8 teeth in row. Short and ordered coverage setae densely grouped on retrolateral side of chelicera. Strikers: line of 5–6 spaced long filiform setae, disposed on a ventral-basal portion of chelicera before the teeth row ( Fig. 195 ). Sternum: 8.80 long, 7.52 wide. Legs: Formula: I = IV II III. Length leg IV to leg I: 1.03. Scopula: Tarsi I–IV fully scopulate; IV with a few sparse setae. Metatarsi I–II fully scopulate; III 1/2 distal; IV 1/3 distal. IV divided by rows of setae. Spination: Palps and legs (ventral apical: tibia/metatarsi): Palp 0; I: 0/0; II 0/0; III 1/2; IV 0/1. Maxilla stridulatory organ: composed of 15 thick setae forming a straight crescent line, setae increase in size from the internal to external side of maxillae; longest ones flattened laterally, tips of setae with rugous texture, 13 slender setae after thickest ones ( Fig. 194 ). Short and ordered coverage setae densely grouped on the retrolateral side of the maxillae/coxae, trochanter, proximal part of palp femur and prolateral side of the same articles of leg I. Spermathecae: Two spermathecae completely separated, roughly straight, ending in a single terminal lobe ( Fig. 191 ). Color pattern (preserved in alcohol): Carapace and abdomen light brown with some golden setae, leg and palpal femora and tibiae brown.