Opisthoncus polyphemus (L. Koch, 1867)

Gardzińska, Joanna & Żabka, Marek, 2013, Redescription of the genus Opisthoncus L. Koch, 1880 (Araneae: Salticidae), Zootaxa 3717 (4), pp. 401-447 : 436

Opisthoncus polyphemus (L. Koch, 1867)

( Fig. 24 )

Type material. 3F Syntypes, ZMH, Mus. Godeffroy 2259, Australia: Brisbane [Queensland].

Remarks. Koch and Keyserling (1867) described both sexes from Brisbane, Sydney, Rockhampton, Bowen, Peak Downs and Gayndah. The syntypes here came from Brisbane.

Diagnosis. Female cheliceral retromargin with two-cuspidate fissidentate tooth ( Fig. 24 F). Copulatory openings relatively small, oriented mid-anteriorly, insemination ducts moderately long, with internal structures as in Fig. 24 H. Differs from resembling O. serratofasciatus by the position of spermathecae which are close to each other, the course of insemination ducts and abdominal colour pattern.

Description. Female ( Fig. 24 ) about 6–6.5 mm long. Cephalothorax round and moderately high (CW = 92% of CL, CH = 50% of CL), pale brown, covered with recumbent, pallid scales, paler markings around eyes and central protuberance ( Figs 24 B–C). Surrounding of eyes almost black. Clypeus narrow, pale brown, densely covered with pallid scales and setae, numerous and long below AME and making oblique traces on cheeks ( Fig. 24 D). Chelicerae pale brown, with dentition as in diagnosis. Endites pale brown, labium dark brown, both with yellow anterior margins. Sternum wide, yellow, with scattered fine, brownish hairs ( Fig. 24 E). Abdomen yellow, with rather indistinct colour pattern, clothed in recumbent pallid scales and scattered protruding brown hairs. Venter pale yellow, with elongate stripes of small orange spots. Spinnerets orange. Legs I orange, others paler. Pedipalps yellow, with orange tibiae and tarsi. Epigyne ( Figs 24 G–H) with posterior notch slightly concave, copulatory openings moderately short, insemination ducts of uniform width, membranous parts coiled in one circle, sclerotized intermediate parts looped as in Fig. 24 H, spermathecae moderately large, anteriorly close to each other. Dimensions. CL 2.48, CW 2.28, CH 1.24, AEW 1.68, PEW 1.76, EFL 0.96, AL 3.88, AW 2.12, L1 5.56 (1.56+1.28+1.28+0.88+0.56).

Male unknown (type specimen lacking).

Figures

FIGURE 24. Opisthoncus polyphemus (L. Koch, 1867), female syntype. A: original drawings from Koch & Keyserling (1867); B – C: general appearance, dorsal and lateral views; D: cephalothorax, frontal view; E: sternum; F: chelicera, ventral view; G – H: epigyne with its internal structures. Scale bars B, C: 1 mm; G – H: 0.15 mm.