Hippasella arapensis (Strand, 1908), comb. nov.

Figs 16–21

Tarentula arapensis Strand 1908: 245 (Syntypes, three females, from Arapa (15°08'21"S, 70°06'15"W), 4600m, Department Puno, Peru, 14.V.1907, K. Seyd, MWNH 443A and 443B, respectively, examined).

Lycosa arapensis: Petrunkevitch 1911: 555; Bonnet 1957: 2633.

Mimohogna arapensis: Roewer 1955: 279 .

Lycosa arapensis: Fuhn & Niculescu-Burlacu, 1971: 193 .

Other material examined. PERU: Department of Huancavelica: Huancavelica (13°46'S, 74°58'W), 3700m, 23, March 1958, F. Blancas (MHNSM, IBSP). Department of Junin: Acolla (11°43'S, 75°34'W), 3460m, 13, 21 January 1954, F. Blancas (MHNSM); Yauli, cerro Jerusalém (11o39'38.3"S, 76o04'35.6"W), 4106m, 1Ƥ, 23 August 2005, W. Paredes (MHNSM). Department of Puno: Arapa (15°08'21"S, 70°06'15"W), 6Ƥ with 2 eggsacs, February 1948, F. Blancas (MHNSM; IBSP); Juli (16°13'S, 69°27'W), 1Ƥ, 0 7 November 1952, F. Blancas (MHNSM); Puno (15°50'35"S, 70°01'19"W), 2Ƥ, 15 September 1952, F. Blancas (MHNSM).

Diagnosis. Hippasella arapensis can be distinguished from H. guaquiensis (see Álvares & Brescovit 2007, figs 4–9) by the large and elongated tegular lobe of the male palp and the median apophysis, which is not coiled at the tip (Figs 17–18), and by the transverse bar of median septum of the female epigynum narrower and with the lateral ends directed anteriorly (Fig. 19); and with a shorter stalk in the spermathecae (Fig. 21).

Description. Male (Puno, Arapa, MHNSM). Carapace brownish, with a median paler band and a pair of narrow submarginal paler bands (Fig. 16). Chelicerae reddish-brown. Sternum, labium and endites brownish. Coxae and legs brownish. Abdomen: dorsum yellowish, with a light brown cardiac mark, delineated by a brownish line and flanked by a pair of longitudinal pale bands (Fig. 16); venter of abdomen and spinnerets yellowish. Chelicerae: promargin with three teeth, equidistant, the median one larger than the laterals; retromargin with three large and equally sized teeth, the basal one distant from the others. Total length 6.50. Carapace: length 3.40, width 2.40. Eyes: anterior row slightly procurved; ALE and PLE located on small tubercles; diameters: AME 0.27; ALE 0.25; PME 0.52; PLE 0.46; interdistances: AME–AME 0.20; AME–ALE 0.12; PME–PME 0.42; PME–PLE 0.46; PLE– PLE 1,44. Leg measurements: femur 3.00/ patella 1.70/ tibia 2.35/ metatarsus 2.20/ tarsus 1.45/ total 10.70; II: 3.00/ 1.75/ 2.10/ 2.10/ 1.45/ 10.40; III: 2.90/ 1.55/ 1.90/ 2.30/ 1.40/ 10.05; IV: 3.60/ 1.85/ 2.90/ 3.70/ 1.85/ 13.90. Leg spination: femur I: p0-1-2, d1-1-1, r0-1-1, II–III: p0-1-1, d1-1-1, r0-1-1, IV: p0-1-1, d1-1-1, r0-0-1; patellae I– II: p1, r0; III–IV: p1, r1; tibia I: p1-1, d0, r1-0, v2-2 -2, II: p1-1, d0, r1-1, v2-2 -2; III–IV: p1-1, d1-1, r1-1, v2-2 -2; metatarsus I: p1-1-1, r0-1-1, v2-2 -3, II–III: p1-1-1, r1-1-1, v2-2 -3, IV: p1-1-1, r1-1-1, v3-2 -3. Palp: tibia cylindrical, about twice as long as wide; median apophysis elongated, hyaline (Fig. 17); tegular lobe long and twisted apically; conductor apparently lost (Figs 17–18).

Female (Puno, Arapa, MHNSM): Coloration and chelicerae as male. Total length 10.65. Carapace length 5.03, width 3.70. Eyes as male; diameters: AME 0.21; ALE 0.20; PME 0.39; PLE 0.34; interdistances: AME–AME 0.10; AME–ALE 0.13; PME–PME 0.27; PME–PLE 0.35; PLE–PLE 1,0 6. Leg measurements: femur 3.00/ patella 1.70/ tibia 2.25/ metatarsus 2.20/ tarsus 1.45/ total 10.70; II: 3.00/ 1.75/ 2.10/ 2.10/ 1.45/ 10.40; III: 2.90/ 1.55/ 1.90/ 2.30/ 1.40/ 10.05; IV: 3.60/ 1.85/ 2.90/ 3.70/ 1.85/ 13.90. Leg spination as in males, except: femur I: p0-0-2, r0; patella I: p0, r0; tibia I: p0, r0, II: r0, v1 r-1r-2, III: v1 p-1p-2, IV: v1 p-2-2; metatarsus I: p0, r0; II: p0, r1-1-0. Epigynum: epigynal plate about 1.6 times wider than long; longitudinal bar of median septum widened anteriorly; transverse bar straight, with lateral ends curved anteriorly; atrium small and located near junction of longitudinal and transverse bars of median septum (Fig. 19); hoods absent; spermathecae with base widened and longitudinally elongated, with a small and rounded lobe best viewed in a ventral view of a clarified epigynum (Fig. 20); stalk short, curved in “U”; head rounded; copulatory ducts tubular and curved laterally (Fig. 21).

Variation. Three males: total length 6.50–7.25; carapace length 3.20–3.75; femur I length 2.90–3.05. Six females: total length 8.10–12.85; carapace length 4.12–5.46; femur I length 2.85–3.20.

Distribution. Peru.

Remarks. Sierwald (2000) removed Hippasella from the synonymy of Sosippus Simon, which had been proposed by Capocasale (1990: 140). The placement of the monotypic genus Hippasella in Sosippinae is recent and was based on the absence of a terminal apophysis and presence of a developed palea in the male pedipalp (Álvares & Brescovit 2007). Species of Hippasella can be diagnosed by the tegular lobe in the pedipalp with a small and pointed lateral apophysis, small and membranous median apophysis and small lobe on the apical edge of the ventral face of the tegulum (see Álvares & Brescovit 2007, figs. 4–5) in the male palp, and by the large and flattened median septum, spermathecae with long and sigmoid curved stalk and small and not bilobate base (see Álvares & Brescovit 2007, fig. 8) in the epyginum of females. Hippasella arapensis presents all these diagnostic structures (see Figs. 17–18, 20–21), which justifies its transfer here.