Strotarchus violaceus F.O. Pickard-Cambridge, 1899

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 : 15-16

Strotarchus violaceus F.O. Pickard-Cambridge, 1899

Figs. 70−72

Strotarchus violaceus F.O. Pickard-Cambridge, 1899: 87 , pl. 6, figs. 15−16. Male lectotype and female paralectotype, here designated, from Omitelme [Omiltemi, Guerrero, 99º40.2'W, 17º30'N], Mexico, H.S. Smith coll., deposited in BMNH 1901/3/ 3 /259-260, examined.

Diagnosis. Males can be distinguished by the relatively short cymbium, well developed and elaborated tegular apophysis, composed of an oval, distally narrowed projection on the retrolateral margin of tegulum; short and acute embolar process, directed prolaterally; and embolar apices hook-shaped ( Fig. 70 ). Females resemble those of S. mazamitla n. sp. by the reduced atrium, but differ from this species by the semi-circular shape of this structure, with anterior border unsclerotised ( Fig. 72 ).

Description. Male (Lectotype). Carapace red brown, chelicerae darker. Legs orange with distal area of the articles darker. Abdomen yellow with orange anterior dorsal stripes. Total length 10.60. Carapace 4.80 long, 4.00 wide. Eye diameters: AME 0.35, ALE 0.27, PME 0.25, PLE 0.25. Chelicerae with 3 promarginal teeth and 2 retromarginal teeth. Leg measurements: femur I 5.80/ II 5.20/ III 4.30/ IV 5.40. Leg spination: I—femur d1-1-1, p0-0-2, r1-1-1; tibia d0, p1-1-0, r1-1-0, v2-2 -0; metatarsus d0, p1-1-1, r1-1-1, v2-1 p-2. II—femur d1-1-1, p0-1-1, r1-1-1; tibia d0, p1-1-0, r1-1-0, v2-2 -0; metatarsus d0, p1-1-1, r1-1-1, v2-1 p-2. III—femur d1-1-1, p1-1-1, r0-1-1; tibia d0, p1-1-0, r1-1-0, v2-2 -2; metatarsus d0, p1-1-1, r1-1-1, v2-2 -2. IV—femur d1-1-1, p0-1-1, r0-0-1; tibia d0, p1-1-0, r1-1-0, v2-2 -2; metatarsus d0, p1-1-1, r1-1-1, v2-2 -2. Palpal tibiae strong, large, half of cymbium length; RTA rectangular, extending retrolaterally; ppRTA a pointed tip. Tegulum sub-oval; proximal fold of reservoir retrolaterally oriented; TA well developed, with an oval projection, flattened distally; EB large, strongly sclerotised, not folded; EP short, with pointed tip; EA short, hook-shaped ( Figs. 70, 71 ).

Female (Paralectotype). Coloration as in male. Total length 11.00. Carapace 4.60 long, 3.70 wide. Eye diameters: AME 0.30, ALE 0.26, PME 0.27, PLE 0.25. Chelicerae with 3 promarginal teeth and 2 retromarginal teeth. Leg measurements: I femur 4.80/ II 4.40/ III 3.60/ IV 4.60. Leg spination: I—femur d1-1-1, p0-0-2, r1-1-1, tibia d0, p1-1-0, r1-1-0, v2-2 -0; metatarsus d0, p1-1-1, r1-1-1, v2-2 -2. II—femur d1-1-1-, p0-1-1, r1-1-1; tibia d0, p1-1- 0, r1-1-0, v2-2 -0; metatarsus d0, p1-1-1, r1-1-1, v2-2 -2. III—femur d1-1-1, p1-1-1, r1-1-1; tibia d0, p1-1-0, r1-1-0, v2-2 -0; metatarsus d0, p1-1-1, r1-1-1, v2-2 -2. IV—femur d1-1-1, p0-1-1, r0-0-1; tibia d0, p1-1-0, r1-1-0, v2-2 -0; metatarsus d0, p1-1-1, r1-1-1, v2-2 -2. Epigynum (not dissected): epigynal surface excavated, atrium semi-circular with posterior margin slightly projected posteriorly, strongly sclerotised, anterior margin not so scletorised ( Fig. 72 ).

Distribution. Known only from the type locality.

Other material examined. None.

Figures

FIGURES 70 – 72. Strotarchus violaceus F. O. Pickard-Cambridge, 1899, male: 70) palp, ventral; 71) palp, retrolateral; female: 72) epigynum, ventral. Scale bar = 0.5 mm: 70 - 71; 0.25 mm: 72.