Opisthoncus bitaeniatus L. Koch, 1880

Gardzińska, Joanna & Żabka, Marek, 2013, Redescription of the genus Opisthoncus L. Koch, 1880 (Araneae: Salticidae), Zootaxa 3717 (4), pp. 401-447 : 413

Opisthoncus bitaeniatus L. Koch, 1880

( Fig. 8 )

Opisthoncus bitaeniatus: L. Koch 1880: 1195 ; Rainbow 1911: 308, 1920: 268; Żabka, 1991: 44.

Type material. 1F Syntype, ZMH, Mus. Godeffroy 7733, Australia: Sydney [NSW].

Diagnosis. Cheliceral retromargin with fissident, two-cuspidate tooth ( Fig. 8 F). Copulatory openings wide, oriented mid-anteriorly, posterior notch triangular and relatively deep. Membranous part of each insemination duct narrowing and coiled in single circle, sclerotized, intermediate duct looped as in Fig. 8 I, spermathecae moderately large.

Description. Female ( Fig. 8 ) about 8.5 mm long. Cephalothorax trapezoid, broadest at PLE level (CW = 87% of CL), moderately high ( CH = 53% of CL), pale brown, surrounding of eyes black ( Figs 8 B, C, E). Clypeus narrow, pale brown, covered with pallid setae ( Fig. 8 D). Chelicerae brown, endites and labium orange, with yellow anterior margins. Sternum relatively narrow, yellow, with brownish margins and scattered short, brown hairs ( Fig. 8 G). Abdomen yellow, with longitudinal medial, irregular stripe, bordered by brownish areas. Venter yellowish. Spinnerets orange. Legs orange, I, II somewhat darker than others. Pedipalps yellow, with orange tarsi. Epigyne as in Figs 8 H–I.

Dimensions. CL 3.00, CW 2.60, CH 1.60, AEW 2.20, PEW 2.36, EFL 1.20, AL 5.40, AW 2.52, L1 6.72 (1.80+1.60+1.60+1.12+0.60).

Figures

FIGURE 8. Opisthoncus bitaeniatus L. Koch, 1880, female syntype. A: original drawings from Koch & Keyserling (1880); B – C: general appearance, dorsal and lateral views; D – E: cephalothorax, frontal and dorso-lateral views; F: chelicera, ventral view; G: sternum; H – I: epigyne and its internal structures. Scale bars B – C: 1 mm; H – I: 0.1 mm.