Bertani, Rogério, Nagahama, Roberto Hiroaki & Fukushima, Caroline Sayuri, 2011, Revalidation of Pterinopelma Pocock 1901 with description of a new species and the female of Pterinopelma vitiosum (Keyserling 1891) (Araneae: Theraphosidae: Theraphosinae), Zootaxa 2814, pp. 1-18: 5--1

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Pterinopelma  Pocock 1901 revalidated

Pterinopelma  Pocock 1901: 551 (type species by monotypy Eurypelma vitiosa Keyserling  1891, holotype male, Brazil, Taquara, in BMNH, examined); Mello-Leitäo 1923: 183, 1943: 153; Petrunkevitch 1928: 80; 1939a: 261; 1939b: 567; Bonnet 1958: 3827; Gerschman & Schiapelli 1978: 86; Valerio 1980: 276.

Diagnosis. Pterinopelma  resembles Lasiodora  C. L. Koch 1850, Vitalius  and Nhandu  Lucas 1983 by the combined absence of accessory prolateral keels and presence of prolateral superior, prolateral inferior, retrolatral and apical palpal keels in males (Figs 1-3, 7-9); and by the spermathecae short, separated by a heavily sclerotized short area in females (Figs 6, 13). Both sexes are distinguished from those of Lasiodora  by the absence of stridulatory hairs on the prolateral coxae. From Nhandu  and Vitalius  the males are distinguished by the presence of denticles in the prolateral inferior keel (Figs 3, 9) and the weakly developed or absent subapical keel (Figs 1-3). Females can be distinguished from Nhandu  by the absence of long setae on the carapace and from Vitalius  either by the presence of uticating hair type III on the abdomen ( P sazimai  sp. nov.), or by having a sternum wider than long ( P vitiosum  ) (Fig. 5).

Redescription. Carapace slightly longer than wide, cephalic region slightly raised to clearly raised, convex. Cephalic and thoracic striae shallow or deep. Fovea straight, shallow ( P. vitiosum  ) or deep ( P. sazimai  sp. nov.). Chelicerae without rastellum, basal segments with 9 to 11 teeth. Eye tubercle distinct, wider than long. Clypeus absent (female P. vitiosum  ) or narrow. Anterior eye row procurved, posterior slightly recurved. AME rounded, ALE, PLE and PME oval. Labium subquadrate, slightly wider than long, with numerous (90-155) cuspules on its anterior third. Maxila subretangular, anterior lobe distinctly produced into a conical process, inner angle bearing numerous cuspules (100-200). Sternum longer than wide ( P. sazimai  sp. nov.) or as long as wide ( P. vitiosum  ), anterior sigilla on sternum/labium edge not visible. Sternal sigilla less than one diameter from margin ( P. sazimai  sp. nov.) or sigilla not visible ( P. vitiosum  ). PMS one-segmented, short; PLS three-segmented, basal segment longer than apical, both longer than median. Apical segment digitiform. STC with a median row of few small teeth. Tarsi I-III fully scopulated, IV divided by row of setae. Metatarsi I-II 2/3 to 4/5 scopulated, metatarsus III scopulated 1/3 to 1/2 its length, metatarsus IV apically scopulated, not divided by a row of setae. Femur IV with retrolateral scopula. Prolateral leg coxae and retrolateral palpal trochanter without stridulatory hairs. Male tibial apophysis with straight branches ( P. sazimai  sp. nov.) or retrolateral branch slightly curved ( P. vitiosum  ) originating from common base, prolateral branch not thickened. Metatarsus I strongly ( P. sazimai  sp. nov.) or slightly ( P. vitiosum  ) curved, when flexed touches retrolateral branch laterally ( P. vitiosum  ) or apex of retrolateral branch ( P. sazimai  sp. nov.). Male palpal bulb pyriform, embolus long, slightly flattened distally. Prolateral keels present, extremely reduced in P. sazimai  sp. nov. PS forms embolus edge distally. PI with series of unequal denticles. AC absent. R not pronounced. A short. SA poorly developed ( P. vitiosum  ) or absent ( P. sazimai  sp. nov.). Spermathecae short, separated by heavily sclerotized short area. SS narrower than SB. Type I urticating hair in males and females with region "A" longer or equal to region "B". Type III ( P. sazimai  sp. nov.) or absent ( P. vitiosum  ) in males and females. Carapace covered by short slender hairs; bordered by hairs pointing out from carapace center. Tibiae IV non-incrassated. Coxae and sternum covered by long hairs ( P. vitiosum  ) or short hairs ( P. sazimai  sp. nov.). General color pattern brown ( P. vitiosum  ), black (male P. sazimai  sp. nov.) or with iridescent blue setae ( P. sazimai  sp. nov. female).


United Kingdom, London, The Natural History Museum [formerly British Museum (Natural History)]


USA, Florida, Gainesville, University of Florida, Florida Museum of Natural History, Allyn Museum