Opisthoncus unicolor L. Koch, 1881

Gardzińska, Joanna & Żabka, Marek, 2013, Redescription of the genus Opisthoncus L. Koch, 1880 (Araneae: Salticidae), Zootaxa 3717 (4), pp. 401-447 : 446

Opisthoncus unicolor L. Koch, 1881

( Fig. 30 )

Opisthoncus unicolor: Koch L. 1881: 1235 ; Rainbow 1911: 310; Żabka 1991: 47.

Type material. 1F Holotype, ZMH, Mus. Godeffroy 7737, Australia: Peak Downs.

Diagnosis. Female cheliceral retromargin with fissidentate, two-cuspidate tooth ( Fig. 30 E). Copulatory openings relatively small, oriented anteriorly, insemination ducts moderately short, coiled. Differs from other species by orientation of copulatory openings and course of insemination ducts.

Description. Female ( Fig. 30 ) about 9 mm long. Cephalothorax widest at PLE and moderately high (CW = 84% of CL, CH = 53% of CL), brown, clothed in recumbent, pallid scales ( Figs 30 B–D). Surrounding of eyes almost black. Clypeus moderately narrow, pale brown, with dense pallid scales and setae, the latter also cover the base of chelicerae ( Fig. 30 F). Cheeks covered with orange hairs. Chelicerae brown, with dentition as in diagnosis. Endites and labium brown, with yellow anterior margins. Sternum relatively narrow, orange with brown margins and scattered pallid and brown hairs. Abdomen yellow, densely clothed in adpressed pallid scales and scattered brown hairs, colour pattern rather indistinct. Spinnerets orange. Venter greyish yellow, with elongate stripes of small gray dots. Legs yellow-orange, first pair brown. Pedipalps yellow, with orange tibiae and tarsi. Epigyne with posterior notch as in Figs 30 G–H, insemination ducts short, coiled in one loop, spermathecae close to each other, walls of spermathecae strongly sclerotized, accessory glands rather invisible.

Dimensions. CL 2.28, CW 1.92, CH 1.20, AEW 1.72, PEW 1.72, EFL 0.80, AL 2.96, AW 2.00, L1 5.70 (1.40+1.16+1.16+0.76+0.48).

Male unknown.

Figures

FIGURE 30. Opisthoncus unicolor L. Koch, 1881, female holotype. A: original drawings from Koch & Keyserling (1881); B – C: general appearance, dorsal and ventral views; D: cephalothorax, dorso-frontal view; E: chelicera, ventral view; F: clypeus; G – H: epigyne and its internal structures. Scale bars B – D: 1 mm; F – G: 0.15 mm.