Pterinopelma vitiosum ( Keyserling 1891 ), Keyserling, 1891

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: 5-8

publication ID

http://doi.org/ 10.5281/zenodo.205607

persistent identifier

http://treatment.plazi.org/id/03A087F9-A456-FF8D-51B7-FC69FCDDFD28

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Plazi

scientific name

Pterinopelma vitiosum ( Keyserling 1891 )
status

 

Pterinopelma vitiosum ( Keyserling 1891)   comb. rev.

( Figs 1 View FIGURES 1 –6, 19; Table 2)

Eurypelma vitiosum Keyserling 1891: 21   , pl. 1, f. 5 (holotype male from Brazil, Taquara, in BMNH, examined); Simon 1903: 937; Petrunkevitch 1911: 65, 776; Roewer 1942: 242, 1954: 1508.

Eurypelma mollicomum: Simon 1892: 167   nec Ausserer, 1875.

Pterinopelma vitiosum: Pocock 1901: 551   , 1903: 108; Mello-Leitão 1923: 190, 1943: 153; Petrunkevitch 1928: 80, 1939: 261; Bonnet 1955: 1831; Capocasale 1980: 5.

Eupalaestrus vitiosum: Pérez-Miles 1992: 34   ; Platnick, 2010. First considered as nomen dubium   by Pérez-Miles 1992: 34.

Diagnosis. Males differ from those of P. sazimai   by the better developed palpal bulb keels ( Fig 1 View FIGURES 1 –3) and the metatarsus I touching the retrolateral side of the retrolateral tibial apophysis when folded. Females differ from those of P. sazimai   by the absence of type III urticating hairs, the sternum being as long as wide (Fig. 5, Table 1) and the absence of a blue iridescence on the setae covering the body.

Material examined. Holotype, 1 male from Brazil, Rio Grande do Sul, Taquara [S 29 ° 38 ' W 50 ° 47 '], Dr. v. Ihering leg., ( BMNH 1890.7.1.390).

Additional material examined. BRAZIL: Rio Grande do Sul: Canela [S 29 ° 21 ' W 50 ° 48 '], MCTP 1520, 1 male, J.W. Thomé, 1991; Caxias do Sul [S 29 ° 10 ' W 51 ° 10 '], 1 female, MCN 22102 View Materials , F. Becker, 18 December 1991; Encantado [S 29 ° 14 ' W 51 ° 52 '], 1 male, MCN 22145 View Materials , L. Dacroce, 17 April 1992; Itaúba, Arroio do Tigre [S 29 ° 19 ' W 53 °04'], 1 male, MCN 7963, H. Bischoff, 19 April 1978; MCN 7943, 1 male, M.H. Galileo, 18 April 1978; MCN 17732 View Materials , MCN 17731 View Materials , 2 females, A.A. Lise, 11 April 1978.

Redescription. Male MCN 7963. Carapace 10.55 long, 10.15 wide, chelicerae 4.46. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 10.72, 5.31, 8.13, 7.42, 4.85, 36.43. II: 9.82, 4.94, 7.38, 6.90, 4.49, 33.53. III: 8.17, 4.03, 5.98, 7.32, 4.93, 30.13. IV: 10.08, 4.42, 8.64, 10.69, 5.25, 39.08. Palp: 6.54, 3.61, 5.53, –, 2.29, 17.97. Midwidths: femora I –IV= 2.11, 2.09, 2.30, 1.85, palp= 1.3; patellae I –IV=2.09,1.80, 1.87, 1.72, palp= 1.91; tibiae I – IV= 1.7, 1.68, 1.50, 1.57, palp= 2.03; metatarsi I –IV= 1.26, 1.10, 1.30, 1.20 tarsi I –IV= 1.14, 0.90, 1.05, 1.24, palp= 1.28. Abdomen 12.60 long, 7.42 wide. Spinnerets: PMS, 1.53 long, 0.41 wide, 0.60 apart; PLS, 2.13 basal, 1.54 middle, 1.88 distal; midwidths 0.93, 0.70, 0.51, respectively.

Carapace: length to width 1.04; cephalic area moderately raised, thoracic striae shallow. Fovea: shallow, straight, 1.52 wide. Carapace covered with short, slender, dense setae and bordered with stiff setae pointing out.

Eyes and eye tubercle: tubercle 0.38 high, length 1.20, width 1.59. Clypeus 0.05 wide. Anterior row procurved, posterior slightly recurved. Sizes and inter-distances: AME 0.29, ALE 0.36, PME 0.16, PLE 0.31, AME –AME 0.27, AME –ALE 0.14, AME –PME 0.15, ALE –ALE 1.00, ALE –PME 0.21, PME –PME 0.78, PME –PLE 0.03, PLE –PLE 1 ,0 7, ALE –PLE 0.08, AME –PLE 0.30. Ratio of eye group width to length 1.97.

Maxillae: length to width: 1.59. Cuspules: 100 ─ 150 spread over ventral inner heel. Lyra absent. Labium: length 2.02, width 2.11, with ca. 100 cuspules spaced by less than one diameter from each other on anterior third center. Labio-sternal groove shallow, flat, without visible sigilla.

Chelicerae: rastellum absent, basal segments with 10 and 9 teeth on right and left side, respectively, both with series of basal denticles.

Sternum (Fig. 5): length 5.00, width 5.11. Porterior angle rounded, not separating coxae IV. Sigilla: not visible. Legs: legs formulla: IV I II III. Clavate trichobothria: on distal 2 / 3 of tarsi I –IV. Leg coxae: with sparse soft setae; stridulatory or modified setae lacking.

Scopula: Tarsi I –III fully scopulate. Tarsus IV divided by row of setae. Metatarsi I─ II 2 / 3 scopulate; III 1 / 2, IV ascopulate. Spines: palp: femur 0, patella 0, tibia p 0-1 - 5 (3 ap); leg I: femur 0, patella 0, tibia p 1 -0-0; leg II: femur 0, patella 0, tibia v 1 - 1 -3ap, p 0-1 -0; metatarsus v 1 - 1 -3ap, p 0-1 -0 leg III: femur 0, patella 0, tibia p 1 - 1 - 1, r 1 - 1 - 0, metatarsus p 0-1 -0, r0- 0-1, leg IV: femur 0, patella 0, tibia v 1-2 - 3 (2 ap), p 0-1 -0, r 1 - 1 -0, metatarsus d0- 0-1 a, v 2-3 - 4 (3 ap), p 1-2 - 1, r 1-2 - 2 ap. Claws: ITC entirely absent; STC with small teeth.

Urticating hairs: Type I with region "A" longer than region "B" on abdomen dorsum.

Palp ( Figs 1 View FIGURES 1 –3): palpal bulb pyriform, embolus long, slightly flattened laterally at distal region. Prolateral keels present. PS forming embolus edge distally. PI long, with series of unequal denticles on its basal and central areas. A present, short. R present, rounded. SA present, but inconspicuous.

Tibial apophysis (Fig. 4) with two branches originating from common base, retrolateral longest, and with slight distal curvature; prolateral straight.

Metatarsus I slightly curved, when folded touches retrolateral tibial apophysis branch laterally.

Color pattern: Carapace dark brown with light brown hairs on its border. Coxae, labium, sternum and maxila dark brown. Legs dark brown with light brown long setae. Leg rings and stripes inconspicuous. Abdomen dorsally black with light brown long setae, ventrally black.

SD 0.033

Description. Female. MCN 17732 View Materials . Carapace 11.01 long, 10.16 wide, chelicerae 4.32. Legs (femur, patella, tibia, metatarsus, tarsus, total): I: 9.04, 5.41, 6.56, 4.86, 3.90, 29.77. II: 7.75, 4.73, 5.53, 4.90, 3.78, 26.69. III: 6.92, 4.04, 4.77, 4.59, 3.47, 23.79. IV: 8.85, 4.46, 6.89, 7.60, 3.84, 31.64. Palp: 6.95, 3.90, 4.81, –, 4.25, 19.91. Midwidths: femora I –IV= 1.67, 1.47, 1.56, 1.05, palp= 1.32; patellae I –IV=2.0, 1.92, 1.75, 1.64, palp= 1.81; tibiae I – IV= 1.76, 1.64, 1.48, 1.44, palp= 1.60; metatarsi I –IV= 1.65, 1.48, 1.25, 1.08; tarsi I –IV= 1.60, 1.41, 1.17, 1.28, palp= 1.55. Abdomen 12.62 long, 9.98 wide. Spinnerets: PMS, 2.21 long, 0.80 wide, 0.8 apart; PLS, 2.44 basal, 1.45 middle, 1.89 distal; midwidths 1.07, 0.82, 0.58, respectively.

As in male, except:

Carapace: length to width 1.08; cephalic area raised, thoracic striae deep. Fovea: shallow, straight, 1.85 wide. Carapace with soft long setae pointing out.

Eyes and eye tubercle: tubercle 0.38 high, length 1.35, width 2.01. Clypeus absent. Sizes and inter-distances: AME 0.25, ALE 0.52, PME 0.18, PLE 0.29, AME –AME 0.28, AME –ALE 0.26, AME –PME 0.19, ALE –ALE 0.98, ALE –PME 0.65, PME –PME 0.93, PME –PLE 0.40, PLE –PLE 1.23, ALE –PLE 0.17, AME –PLE 0.46. Ratio of eye group width to length 1.85.

Maxillae: length to width: 1.39. Cuspules: 100 ─ 200 spread over ventral inner heel. Labium: length 1.83, width 2.62. Sternum: length 5.53 width 5.72.

Legs: Scopula: Tarsi I –III fully scopulate, IV divided by a row of 4-5 setae. Metatarsi I –II 4 / 5 scopulate; III 1 / 2, IV 1 / 4 distal scopulate. IV not divided by row of setae. Spines: palp: femur p0- 0-1, patella 0, tibia v 1-2 - 2 ap, p 1- 2 - 2; leg I: femur p0- 0-1, patella 0, tibia v0- 0-1 ap, metatarsus v0- 0-1 ap; leg II: femur p0- 0-1, patella 0, tibia v 0-1 -0, p- 1 - 1 - 1; metatarsus v 1 - 0-3 ap, p 0-1 -0; leg III: femur r0- 0-1, patella 0, tibia v 0-1 - 2 ap, p 1 - 1 - 1, r 1 - 1 - 1, metatarsus v 1- 2 - 3 ap, p 1 - 1 - 1, r 0-1 - 2; leg IV: femur 0, patella 0, tibia v 0-1 - 2 ap, r0- 0-2, metatarsus v 2-4 - 6 (3 ap), p0- 0-1, r 0-3 - 3.

Genitalia: Two short spermathecae separated by heavily sclerotized short area, spermathecal stalk narrower than spermathecal bulb (Fig. 6).

Color: Abdomen ventrally brown.

Distribution. Brazil, northern of the State of Rio Grande do Sul ( Fig. 19 View FIGURE 19 ). In this region, the altitude ranges from a few meters to more than 800 meters a.s.l. The vegetation comprises Subcaducifolious Atlantic Forest with Araucaria angustifolia   and patches of "campo" ( IBGE 1977).

TABLE 2. Lengths and widths (in mm), median and standard deviation (SD) of carapace and sternum in Pterinopelma vitiosum specimens.

  Sex Female Male Male Sternum length Sternum width 5.53 5.72 5.00 5.11 6.85 6.62  
  Female Female    
MCTP

Museu de Ciencias

PMS

Prirodonamen Muzej Skopje

ITC

International Transit Centre

STC

Sichuan Teacher's College

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Theraphosidae

Genus

Pterinopelma

Loc

Pterinopelma vitiosum ( Keyserling 1891 )

Bertani, Rogério, Nagahama, Roberto Hiroaki & Fukushima, Caroline Sayuri 2011
2011
Loc

Eupalaestrus vitiosum: Pérez-Miles 1992 : 34

Perez-Miles 1992: 34
Perez-Miles 1992: 34
1992
Loc

Pterinopelma vitiosum:

Capocasale 1980: 5
Bonnet 1955: 1831
Petrunkevitch 1928: 80
Mello-Leitao 1923: 190
Pocock 1901: 551
1901
Loc

Eurypelma mollicomum:

Simon 1892: 167
1892
Loc

Eurypelma vitiosum

Roewer 1942: 242
Petrunkevitch 1911: 65
Simon 1903: 937
Keyserling 1891: 21
1891