Bioacoustics of Psalmopoeus irminia

Redescription. Male (MNRJ 7709) Total length, not including chelicerae or spinnerets 30.98. Carapace 14.60 long, 12.58 wide, 7.71 high. Chelicera: 6.85 long. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 17.91, 9.44, 16.77, 15.98, 7.28, 67.38; II: 17.15, 8.34, 15.13, 15.30, 7.15, 63.07; III: 12.70, 5.81, 11.09, 12.39, 5.77, 47.76; IV: 15.48, 6.14, 13.94, 14.63, 6.11, 56.30; Palp: 10.08, 5.47, 9.14, -, 3.37, 28.06. Midwidths: femora I–IV= 2.52, 2.10, 2.03, 1.54, 1.33, palp= 1.92; patellae I–IV= 2.10, 2.37, 2.13, 2.25, palp = 1.96; tibiae I–IV= 2.03, 2.10, 1.66, 1.70, palp = 1.95; metatarsi I–IV= 1.54, 1.55, 1.25, 1.29; tarsi I–IV= 1.33, 1.36, 1.33, 1.24, palp = 1.93. Abdomen: 16.01 long, 8.70 wide. Spinnerets: PMS, 1.47 long, 0.47 wide, 0.50 apart; PLS, 1.48 basal, 1.06 middle, 1.81 distal; midwidths 0.82, 0.69, 0.54, respectively. Carapace: 1.16 times longer than wide; cephalic region slightly raised, thoracic striae conspicuous. Fovea: deep, straight, 0.75 wide. Eyes: eye tubercle 0.78 high, 2.37 long, 4.11 wide. Clypeus: absent. Anterior eye row straight, posterior slightly recurved. Eye size and interdistances: AME 0.94, ALE 0.91, PME 0.57, PLE 0.77, AME–AME 0.63, AME–ALE 0.31, AME–PME 0.26, ALE– ALE 2.31, ALE–PME 0.27, PME–PME 2.25, PME–PLE 0.23, PLE–PLE 2.96, ALE–PLE 0.34. Maxilla: length to width 1.78. Cuspules: 143 spread over ventral inner heel. Labium: 1.47 long, 1.56 wide, with ca. 158 cuspules spaced ca. 1 diameter from each other on anterior third. Chelicera: basal segment with 9 teeth in row. Short and ordered coverage setae densely grouped on the retrolateral side of the chelicera. Strikers: line of 6 spaced, long filiform setae, disposed on ventralbasal portion of chelicerae before the teeth row ( Fig. 285 ). Sternum: 7.10 long, 5.69 wide. Legs: Formula: I = II = IV III. Length leg IV to leg I: 0.84. Scopula: Tarsi I–IV fully scopulate; IV with a few sparse setae. Metatarsi I–II fully scopulate; III 3/4 distal; IV 1/4 distal. IV divided by rows of setae. Spination: Palps and legs (ventral apical: tibia/metatarsi): Palp: 0; I: 1 behind tibial apophysis, II: 2/0; III: 2/3, IV: 2/2. Maxillary stridulatory organ composed of 11 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, 12–14 slender setae after thickest ones ( Fig. 284 ). 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 280–282 ): two processes, retrolateral longer than prolateral, one spine at side of prolateral, one on apical part of retrolateral process. A small rounded protuberance behind retrolateral process. Metatarsus I folds on retrolateral side of tibial apophysis. Palp ( Figs 276–279 ): tegulum length 1.23, width 1.78, embolus proximal width 0.77, embolus length 4.05. Embolus proximal portion straight. Embolus length to tegulum length: 3.29. Embolus distal third curving gently to ventral and retrolateral sides. Embolus tapers to its tip ending in a roughly straight tip. Color pattern (preserved in alcohol): Carapace brown, femur of palp and metatarsi with an orange line from the retrolateral side toward the center, tarsi with an orange dorsal spot. Redescription. Female (MNRJ 7709): Total length, not including chelicerae or spinnerets 43.21. Carapace: 16.97 long, 15.05 wide, 9.48 high. Chelicera: 8.88 long. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 15.57, 9.44, 13.25, 11.91, 6.03, 56.2; II: 14.10, 8.75, 12.37, 11.64, 6.16, 53.02; III: 12.37, 7.01, 9.85, 10.47, 5.82, 45.52; IV: 14.87, 7.22, 13.18, 13.24, 5.9, 54.41; Palp: 10.2, 5.97, 7.64, -, 7.31, 31.12. Midwidths: femora I–IV= 3.50, 3.08, 3.41, 3.01, palp = 2.45; patellae I–IV= 3.07, 3.11, 2.90, 2.86, palp= 2.58; tibiae I–IV= 3.03, 2.77, 2.34, 2.66, palp= 2.44; metatarsi I–IV= 2.61, 2.13, 1.91, 1.75; tarsi I–IV= 2.16, 2.20, 2.29, 2.02, palp= 2.40. Abdomen: 24.46 long, 14.54 wide. Spinnerets: PMS, 2.07 long, 1.00 wide, 0.86 apart; PLS, 2.94 basal, 1.43 middle, 2.61 distal; midwidths 1.30, 1.02, 0.64, respectively. Carapace: 1.13 times longer than wide; cephalic region slightly raised, thoracic striae conspicuous. Fovea: deep, straight, 0.59 wide. Eyes: eye tubercle 1.34 high, 2.57 long, 3.80 wide. Clypeus: absent. Anterior eye row straight, posterior slightly recurved. Eye size and interdistances: AME 0.70, ALE 0.83, PME 0.58, PLE 0.67, AME–AME 0.66, AME–ALE 0.43, AME–PME 0.27, ALE–ALE 2.78, ALE–PME 0.52, PME–PME 2.06, PME–PLE 0.16, PLE–PLE 2.89, ALE–PLE 0.35. Maxilla: length to width 1.53. Cuspules: ca. 191 spread over ventral inner heel. Labium: 2.65 long, 2.99 wide, with ca. 190 cuspules spaced ca. 1 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 5–9 spaced long filiform setae, disposed on ventralbasal portion of chelicerae before the teeth row ( Fig. 287 ). Sternum: 8.97 long, 7.35 wide. Legs: Formula: I = IV II III. Length leg IV to leg I: 0.97. Scopula: Tarsi I–IV fully scopulate; IV with a few sparse setae. Metatarsi I–II fully scopulate; III 3/4 distal; IV 1/4 distal. IV divided by rows of setae. Spination: Palp and legs (ventral apical: tibia/metatarsi): Palp: 0; I: 0/0; II: 2/0; III: 2/0; IV: 1/0. Maxillary stridulatory organ: composed of 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, 12–14 slender setae after thickest ones ( Fig. 286 ). 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 ( Fig. 283 ): Two elongate spermathecae completely separated, roughly straight, with 2–3 rounded, sclerotized lobes disposed on a central fold on middle area, decreasing in size from apex. Apical lobe of spermathecae rounded and well sclerotized. Color pattern (preserved in alcohol): Carapace brown and abdomen with dark longitudinal line connected with at least 4 transverse lines forming orange paired macules dorsally, metatarsi with an orange line from the retrolateral side towards the segment, tarsi with an orange dorsal spot.