Strotarchus nebulosus Simon, 1888

Bonaldo, Alexandre B., Saturnino, Regiane, Ramírez, Martín J. & Brescovit, Antonio D., 2012, A revision of the American spider genus Strotarchus Simon, 1888 (Araneae: Dionycha, Systariinae), Zootaxa 3363, pp. 1-37 : 17

Strotarchus nebulosus Simon, 1888

Figs. 75−76

Strotarchus nebulosus Simon, 1888: 211 . Female holotype from Presidio, Mexico, deposited in MNHN 6436, examined.

Diagnosis. Females of Strotarchus nebulosus differ from those of other species with parallel copulatory ducts by the large pentagonal atrium ( Figs. 75, 76 ).

Description. Female (Holotype MNHN). Carapace red brown, with cephalic area orange. Chelicerae, labium and endites brownish. Sternum yellow with brown margins. Legs orange, abdomen yellowish. Total length 12.50. Carapace 5.40 long, 4.00 wide. Eye diameters: AME 0.25, ALE 0.30, PME 0.17, PLE 0.20. Chelicerae with 2 promarginal teeth separated by their width and 3 retromarginal teeth, the proximal one dislodged. Leg measurements: femur I 4.55/ II 3.90/ III 3.35/ IV 4.45. Leg spination: I—femur d1-1-1-1-0, p0-1-1-1, r0-1-1-0; tibia d0, p2-2, r0, v2-2 -0; metatarsus d0, p0-1-2, r0, v2-2 -2. II—femur d1-1-1, p0-1-1-1, r0-1-1-1; tibia d0, p2-2, r0, v2-2 -0; metatarsus d0, p0, r1-1-1, v2-2 -2. III—femur d1-1-1, p0-1-1-1, r0-1-1; tibia d0-1-0, p2-2, r2-2, v2-2 -1r; metatarsus d0, p1- 2-2, r1-1-2, v2-2 - 1m. IV—femur d1-1-1, p0-1-1, r0-1-1; tibia d0-1, p2-2, r2-2, v2-2 -2; metatarsus d0, p1-2-2, r1-2- 2, v2-2 - 1m. Epigynum: atrium large, pentagonal, anterior margin with a small median projection, posterior margin procurved; AP rounded posteriorly, median slit deep, ample, without lateral notches, rounded anteriorly; CD parallel, heavily helicoid; GK triangular, short, medially oriented; SS slightly constricted posteriorly, with a small basal protuberance; spermathecae globose ( Figs. 75, 76 ).

Variation. Six females: total length 8.50−10.40; carapace 3.60−4.30; femur I 3.40−4.20.

Distribution. Mexico.

Other material examined: MEXICO. Nayarit, 800 m el., Mecatan [105º7.8'W, 21º31.8'N], 1 female, May 23, 1949, G.M. Bradt coll. ( AMNH); 1 female ( MPEG); 1 female ( IBSP 43401); Sinaloa, Piaxtla (river, 106º40'W, 23º50'N), 1 female, May 16, 1953, W.J. Gertsch & W. Ivie coll. ( AMNH); Guerrero, 7 mi. South of Chilpacingo [99º30'W, 17º33'N], 2 females, Jul. 29, 1956, W.J. Gertsch & V. Roth coll. ( AMNH).

Figures

FIGURES 73 – 80. Strotarchus praedator (O. Pickard-Cambridge, 1898), male: 73) palp, ventral; 74) palp, retrolateral. Strotarchus nebulosus Simon, 1888, female: 75) epigynum, ventral; 76) epigynum, dorsal. Strotarchus monasticus new species, male: 77) palp, ventral; 78) palp, retrolateral; female: 79) epigynum, ventral; 80) epigynum, dorsal. Scale bar = 0.5 mm: 73 - 74, 77 - 78; 0.25 mm: 75 - 76, 79 - 80. Abbreviations: A ― Atrium; AP ― Atrial pocket; BEF ― Basal embolar fold; CD ― Copulatory ducts; EA ― Embolar apex; EB ― Embolar basis; EP ― Embolar process; FD ― Fertilization ducts; GK ― Glandular knob; laRTA ― Apical lamella of Retrolateral tibial apophysis; ppRTA ― Prolateral process of Retrolateral tibial apophysis; S ― Spermathecae; SS ― Spermathecae stalk; TA ― tegular apophysis.