Psalmopoeus langenbucheri Schmidt, Bullmer & Thierer-Lutz, 2006

Cifuentes, Yeimy & Bertani, Rogerio, 2022, Taxonomic revision and cladistic analysis of the tarantula genera Tapinauchenius Ausserer, 1871, Psalmopoeus Pocock, 1985, and Amazonius n. gen. (Theraphosidae, Psalmopoeinae), Zootaxa 5101 (1), pp. 1-123 : 92-96

Psalmopoeus langenbucheri Schmidt, Bullmer & Thierer-Lutz, 2006

( Figs 19 , 145 , 293–306 )

Psalmopoeus langenbucheri Schmidt, Bullmer & Thierer-Lutz, 2006: 3 , figs 1–8; Samm & Schmidt, 2008: 14, figs 1–7; World Spider Catalog 2021.

Diagnosis. Females of P. langenbucheri resemble those of P. cambridgei , P. irminia and P. pulcher by the elongate spermathecae with distal straight apex having apical digitiform lobe and lobes in central area ( Fig. 300 ). They differ from those of these species by the triangular spermathecae shape with weakly sclerotized lobes and apical lobe very joined to lobes of the central area ( Fig. 300 ). Males resemble P. pulcher by the intermediate embolus length, more than 2.6 and less than 3 times tegulum length ( Fig. 293 ). They differ by the retrolateral process of tibial apophysis narrow at its base, tapering to its tip ( Figs 297–299 ). Additionally, abdomen dorsum of adult males and females lacks a color pattern or spots ( Figs 305–306 ).

Type material. Holotype female and paratype male from Venezuela, Monagas, surroundings of Caripe [10°10’N, 63°30’W], Langenbucher col., August 1994 (SMF-58086, SMF-58087), examined ( Figs 293–300 ).

Other material examined. VENEZUELA: Aragua: Rancho Grande Station [10°20’57”N, 67°41’04”W], Rancho Grande roof, 1 male, 10 May 1946 ( AMNH unnumbered) .

Redescription. Holotype female (SMF-58086). Total length, not including chelicerae or spinnerets 36.32. Carapace: 15.71 long, 13.86 wide, 8.63 high. Chelicera: 9.48 long. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 11.96, 7.39, 9.91, 9.85, 5.77, 44.88; II: 10.63, 6.74, 8.22, 8.96, 5.13, 39.68; III: 9.65, 6.16, 7.78, 8.62, 4.67, 36.88; IV: 11.85, 6.45, 10.11, 10.90, 5.15, 44.46; Palp: 9.01, 5.82, 6.04, -, 5.92, 26.79. Midwidths: femora I–IV= 2.69, 2.78, 2.74, 2.45, palp= 2.26. Patellae I–IV= 2.87, 2.65, 2.67, 2.92, palp= 2.45; tibiae I–IV= 2.69, 2.32, 2.98, 2.46, palp= 2.17; metatarsi I–IV= 2.03, 1.94, 1.74, 1.55; tarsi I–IV= 1.98, 2.00, 2.03, 1.83, palp= 2.05. Abdomen: 19.90 long, 11.25 wide. Spinnerets: PMS, 1.67 long, 0.69 wide, 0.48 apart; PLS, 1.65 basal, 1.48 middle, 2.49 distal; midwidths 1.63, 1.58, 1.24, respectively. Carapace: 1.13 times longer than wide; cephalic region slightly raised, thoracic striae conspicuous. Fovea: deep, straight, 3.22 wide. Eyes: eye tubercle 1.34 high, 1.98 long, 3.55 wide. Clypeus: absent. Anterior eye row straight, posterior slightly recurved. Eye size and interdistances: AME 0.72, ALE 0.70, PME 0.54, PLE 0.65, AME–AME 0.53, AME–ALE 0.39, AME–PME 0.25, ALE–ALE 2.51, ALE–PME 0.49, PME–PME 1.89, PME–PLE 0.21, PLE–PLE 2.50, ALE–PLE 0.25. Maxilla: length to width 1.51. Cuspules: ca. 147 spread over inner heel. Labium: 2.56 long, 2.86 wide, with 134 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 chelicerae. Strikers: line of 5 spaced long filiform setae, disposed on a ventral-basal portion of chelicera before the teeth row ( Fig. 304 ). Sternum: 7.69 long, 6.27 wide.

Legs: Formula: I = IV II III. Length leg IV to leg I: 0.99. 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: 2/0; II 2/0; III 1/2; IV 1/1. Maxillary stridulatory organ composed of 13–14 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, 6–8 slender setae after thickest ones ( Fig. 303 ). 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 triangular spermathecae completely separated, roughly straight, with 1–2 rounded lobes disposed on a central fold on middle area. Apical lobe of spermathecae short, rounded, fused with lobe from central area ( Fig. 300 ).

Color pattern (preserved in alcohol): Carapace and abdomen light brown with some golden setae; leg, palpal femora, and tibiae brown. Metatarsi with a pinkish line from the retrolateral side towards the segment, tarsi with a reddish dorsal spot.

Redescription. Paratype Male (SMF-58087). Total length, not including chelicerae or spinnerets 21.1. Carapace 9.36 long, 8.52 wide, 4.82 high. Chelicera: 5.37 long. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 10.95, 5.78, 9.75, 9.62, 4.80, 40.90; II: 10.59, 5.27, 9.08, 8.58, 4.80, 38.32; III: 8.61, 4.36, 7.04, 8.27, 4.08, 32.36; IV: 10.52, 4.55, 10.03, 10.63, 4.71, 40.44; Palp: 6.61, 3.82, 6.06, -, 2.09, 18.58. Midwidths: femora I–IV= 1.81, 1.54, 1.72, 1.75, palp= 1.46; patellae I–IV= 2.02, 1.67, 1.65, 1.92, palp= 1.25; tibiae I–IV= 1.72, 1.37, 1.51, 1.51, palp= 1.37; metatarsi I–IV= 1.13, 1.01, 1.08, 0.99; tarsi I–IV= 1.23, 1.04, 1.07, 1.05, palp= 1.70. Abdomen: 10.93 long, 6.36 wide. Spinnerets: PMS 1.67 long, 0.69 wide, 0.54 apart; PLS, 1.64 basal, 1.00 middle, 1.68 distal; midwidths 0.86, 0.80, 0.67, respectively. Carapace: 1.10 times longer than wide; cephalic region slightly raised, thoracic striae conspicuous. Fovea: deep, straight, 1.41 wide. Eyes: eye tubercle 0.78 high, 1.65 long, 2.53 wide. Clypeus: absent. Anterior eye row straight, posterior slightly recurved. Eye size and interdistances: AME 0.60, ALE 0.54, PME 0.31, PLE 0.45, AME–AME 0.39, AME–ALE 0.18, AME–PME 0.12, ALE–ALE 1.74, ALE–PME 0.28, PME–PME 1.36, PME–PLE 0.13, PLE–PLE 1.70, ALE–PLE 0.26. Maxilla: length to width 1.61. Cuspules: ca. 105 spread over inner heel. Labium: 1.53 long, 1.85 wide, with ca. 87 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: line of 5–6 spaced long filiform setae, disposed on a ventral-basal portion of chelicera before the teeth row ( Fig. 302 ). Sternum: 4.83 long, 4.14 wide.

Legs: Formula: I = IV II III. Length leg IV to leg I: 0.99. 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 2/1. Maxillary stridulatory organ: composed of 8–10 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, 6 slender setae after thickest ones ( Fig. 301 ). 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 297–299 ): two processes, retrolateral one longer than prolateral, one spine at side of prolateral, another on apical part of retrolateral process. A conspicuous rounded protuberance behind retrolateral process. Metatarsus I folds on retrolateral side of tibial apophysis.

Palp ( Figs 293–296 ): tegulum length: 0.91, width 1.49, embolus proximal width 0.60, embolus length 2.61. Embolus proximal portion straight. Embolus length to tegulum length 2.87. 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, legs, palpal femora, and tibiae light brown; abdomen beige with a dark line in its middle. Metatarsi with a pinkish line from the retrolateral side towards the segment, tarsi with a pinkish dorsal spot

Distribution. Venezuela ( Fig. 145 ).

Figures

FIGURE 19. Single cladogram obtained with setk.run and concavity 10.239258 (continued), showing the resolution of Psalmopoeinae clade. Absolute and relative Bremer support are in each node.

FIGURE 145. Map showing geographic records (dots) of Psalmopoeus species. Psalmopoeus cambridgei (red), P. reduncus (orange), P. ecclesiasticus (purple), P. emeraldus (light blue), P. plantaris (brown), P. pulcher (green), P. irminia (yellow), P. langenbucheri (blue), P. victori (black).

FIGURES 293–300. Psalmopoeus langenbucheri. (293–299) paratype male (SMF 58087). (293–296) right bulb. 293, retrolateral. 294, prolateral. 295, frontal. 296, dorsal. (297–299) left leg I tibial apophysis. 297, ventral. 298, prolateral. 299, retrolateral. (300) holotype female (SMF 58086), spermathecae. Scale bars = 1 mm.

FIGURES 301–304. Psalmopoeus langenbucheri. (301–302) paratype male (SMF 58087). 301, left maxilla showing lyra (mirrored). 302, basal chelicerae showing strikers. (303–304) holotype female (SMF 58086). 303, left maxilla showing lyra (mirrored). 304, basal chelicerae showing strikers. Scale bars = 1 mm.

FIGURES 305–306. Psalmopoeus langenbucheri, living. 305, female from Venezuela,Aragua, Pittier National Park. 306, male from same locality. Photos: Rick C. West.