Bioacoustics of Psalmopoeus pulcher

Redescription. Male (ICN-Ar-8280). Total length, not including chelicerae or spinnerets 31.95. Carapace 14.95 long, 13.69 wide, 8.64 high. Chelicera: 7.42 long. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 15.98, 7.96, 13.53, 11.31, 6.38, 55.16; II: 13.45, 6.38, 11.14, 9.77, 5.69, 46.43; III: 11.71, 5.65, 9.55, 10.90, 5.55, 43.36; IV: 14.65, 6.38, 13.00, 14.10, 6.02, 54.15; Palp: 8.27, 5.27, 8.17, -, 3.09, 24.80. Midwidths: femora I–IV= 2.49, 2.08, 2.85, 2.81, palp= 2.12; patellae I–IV= 2.63, 2.36, 2.73, 2.71, palp= 2.15; tibiae I–IV= 2.13, 1.90, 1.91, 2.13, palp= 1.95; metatarsi I–IV= 1.77, 1.38, 1.54, 1.54; tarsi I–IV= 1.61, 1.35, 1.57, 1.49, palp= 1.98. Abdomen: 15.02 long, 8.36 wide. Spinnerets: PMS, 1.67 long, 0.73 wide, 0.54 apart; PLS, 2.42 basal, 2.71 middle, 3.01 distal; midwidths 1.35, 1.52, 1.15, respectively. Carapace: 1.09 times longer than wide; cephalic region slightly raised, thoracic striae conspicuous. Fovea: deep, straight, 1.71 wide. Eyes: eye tubercle 1.69 high, 2.06 long, 3.47 wide. Clypeus: absent. Anterior eye row straight, posterior slightly recurved. Eye size and interdistances: AME 0.72, ALE 0.87, PME 0.47, PLE 0.66, AME–AME 0.59, AME–ALE 0.27, AME–PME 0.21, ALE–ALE 2.32, ALE–PME 0.46, PME–PME 1.95, PME–PLE 0.20, PLE–PLE 2.63, ALE–PLE 0.27. Maxilla: length to width 1.92. Cuspules: ca. 162 spread over inner heel. Labium: 3.00 long, 3.20 wide, with ca. 174 cuspules spaced by one diameter from each other on anterior third. Chelicera: basal segment with 10 teeth in row. Short and ordered coverage setae densely grouped on the retrolateral side of the chelicera. Strikers: line of 5–6 spaced long filiform setae, disposed on a ventral-basal portion of chelicera before the teeth row ( Fig 247 ). Sternum: 9.10 long, 7.53 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 rows of setae. Spination: Palps and legs (ventral apical: tibia/metatarsi): Palp 0; I: 1 behind retrolateral process; II: 2/0; III 0/2; IV 0/2. Maxillary stridulatory organ: composed of 9–10 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, 10 slender setae after thickest ones ( Fig. 246 ). 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 242–244 ): two processes, retrolateral longer than prolateral, broad at base, one spine at side of prolateral, one at the apical part of retrolateral process. A conspicuous rounded protuberance behind retrolateral process. Metatarsus I folds on retrolateral side of tibial apophysis. Palp ( Figs 238–241 ): tegulum length 1.30, width 2.26, embolus proximal width 1.05, embolus length 3.80. Embolus proximal portion straight. Embolus length to tegulum length: 2.92. Embolus distal third curving gently to ventral and retrolateral sides. Embolus tapers to tip ending in roughly straight tip. Color pattern (preserved in alcohol): Carapace, legs, palpal femora, and tibiae light brown, abdomen brown. Redescription. Female (ICN-Ar-8278). Total length, not including chelicerae or spinnerets 47.37. Carapace 18.56 long, 16.55 wide, 11.20 high. Chelicera: 10.34 long. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 14.5, 8.76, 12.06, 10.84, 6.59, 52.75; II: 13.4, 8.03, 10.75, 10.05, 5.74, 47.97; III: 12.08, 7.58, 9.84, 10.5, 6.09, 46.09; IV: 15.15, 8.15, 13.58, 13.82, 6.54, 57.24; Palp: 10.05, 5.78, 7.07, -, 7.24, 30.14. Midwidths: femora I–IV= 3.53, 3.44, 3.22, 2.95, palp= 3.07. Patellae I–IV= 3.16, 3.18, 3.12, 3.39, palp= 3.01; tibiae I–IV= 3.07, 2.79, 2.90, 3.03, palp= 2.67; metatarsi I–IV= 2.65, 2.44, 1.97, 1.91; tarsi I–IV= 2.45, 2.61, 2.39, 2.45, palp= 2.67. Abdomen: 26.71 long, 18.73 wide. Spinnerets: PMS, 2.32 long, 1.26 wide, 1.17 apart; PLS, 3.71 basal, 3.26 middle, 4.26 distal; midwidths 1.64, 1.72, 1.43, respectively. Carapace: 1.12 times longer than wide; cephalic region slightly raised, thoracic striae conspicuous. Eyes: eye tubercle 1.48 high, 2.08 long, 3.96 wide. Clypeus: absent. Anterior eye row straight, posterior slightly recurved. Eye size and interdistances: AME 0.76, ALE 0.91, PME 0.49, PLE 0.61, AME–AME 0.77, AME–ALE 0.35, AME–PME 0.32, ALE– ALE 2.66, ALE–PME 0.57, PME–PME 2.07, PME–PLE 0.15, PLE–PLE 2.89, ALE–PLE 0.35. Maxilla: length to width 1.53. Cuspules: ca. 187 spread over inner heel. Labium: 2.95 long, 2.96 wide, with ca. 173 cuspules spaced by one diameter from each other on anterior third. Chelicera: basal segment with 10 teeth in row. Short and ordered coverage setae densely grouped on the retrolateral side of the chelicera. Strikers: line of 5–6 spaced long filiform setae, disposed on a ventral-basal portion of chelicerae before the teeth row ( Fig. 249 ). Sternum: 9.46 long, 7.92 wide. Legs: Formula: I = IV II III. Length leg IV to leg I: 1.08. 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 rows of setae. Spination: Palp and legs (ventral apical: tibia/metatarsi): Palp 0; I: 2/0; II 2/0; III 0/2; IV 0/2. Maxillary 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, 8–10 slender setae after thickest ones ( Fig. 248 ). Short and ordered coverage setae densely grouped on retrolateral side of maxillae/coxae, trochanter, proximal part of palp femur and prolateral side of same articles of leg I. Spermathecae ( Fig. 245 ): Two spermathecae completely separated, roughly straight, with 1–2 round, slightly sclerotized lobes disposed on middle area, decreasing in size from apex, spermatheca wide before apical lobe, almost as wide as the base. Apical lobe of spermathecae digitiform and sclerotized. Color pattern (in vivo): Carapace and abdomen light brown with some golden setae, legs and palpal femora and tibia light brown, metatarsi and tarsi pinkish, metatarsi with a pink-beige line from retrolateral side to it, reddish spot on tarsi. Abdomen with clear brown proximal portion, rest pink-beige, with a longitudinal line that connects with an apical triangular stain of posterior portion of abdomen ( Fig. 272 ).