Opisthoncus confinis L. Koch, 1881

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

Opisthoncus confinis L. Koch, 1881

( Fig. 9 )

Opisthoncus confinis: Koch L. 1881: 1225 ; Rainbow 1911: 308; Żabka 1991: 45.

Type material. 1M Holotype, ZMH, Mus. Godeffroy 7731, Australia: Peak Downs.

Diagnosis. Male cheliceral retromargin of unidentate pattern, both promarginal teeth of similar size. Each chelicera with small frontal spur, ventral spur tooth-shaped and located nearby proper retromarginal tooth ( Figs 9 C, F, G). Fangs without outgrowths. Cheliceral armament similar to O. bellus but differs by shape of cephalothorax, length of embolus, which is set at about 6.30 and relatively shorter tibia (about 47% of cymbium length).

Description. Male ( Fig. 9 ) about 5 mm long. Cephalothorax round, broadest below PLE, moderately high, (CW = 86% of CL, CH = 46% of CL), pale brown, covered with whitish scales, cheek swellings rather indistinct ( Figs 9 B, D). Surrounding of eyes almost black. Clypeus moderately narrow, orange, with numerous whitish setae overhanging towards chelicerae ( Fig. 9 C). Chelicerae, endites and labium brown, the latter with yellow anterior margins. Sternum wide, yellow ( Fig 9 E). Abdomen elongate ovoid, yellow-orange, mostly discoloured, dorsal scutum indistinct. Venter yellow, spinnerets dark yellow. Legs I brown with orange tarsi, others yellow, with brown femora. Palpal organ ( Figs 9 H–K) yellow, tegulum elliptic, embolus distally set, spermophore not meandering, tibia relatively short.

Dimensions. CL 2.16, CW 1.90, CH 1.00, AEW 1.52, PEW 1.52, EFL 0.88, AL 2.68, AW 1.48, L1 5.28 (1.48+1.20+1.32+0.84+0.44)

Female unknown.

Figures

FIGURE 9. Opisthoncus confinis, L. Koch, 1881, male holotype. A: original drawings from Koch & Keyserling (1881); B: general appearance, dorsal view (with shape of cephalothorax); C – D: cephalothorax, frontal (with chelicera) and fronto-lateral views; E: sternum; F – G: chelicerae, lateral (with frontal spur, see arrow) and ventral views; H – K: palpal organ, ventral and retrolateral views. Scale bars A, E: 1 mm; H, K: 0.15 mm.