Redescription of the genus Opisthoncus L. Koch, 1880 (Araneae: Salticidae) Gardzińska, Joanna Żabka, Marek Zootaxa 2013 3717 4 401 447 6T2VK L. Koch, 1880 L. Koch 1880 [151,649,924,950] Arachnida Salticidae Opisthoncus Animalia Araneae 19 420 Arthropoda species lineativentris    Typematerial.1M Syntype, ZMH, Mus. Godeffroy 7734, Australia: Rockhampton [Queensland].   Remarks.Koch and Keyserling (1880) described both sexes, the available material is represented only by male syntype.   Diagnosis.Both male cheliceral promarginal teeth small, retromargin unidentate ( Fig. 14F). Frontal cheliceral surface with sclerotized anterior ridge, terminated by small, vestigial spur ( Fig. 14E). Ventral spurs enlarged, lobelike ( Fig. 14F). Fangs with internal and external outgrowths ( Fig. 14E–F). Sternum relatively narrow ( Fig. 14D). Tegulum elliptic, embolus moderately long, arising at 6 o’clock. Differs from similar  O. mandibularisby the shape of ventral spurs and slightly meandering translucent part of spermophore.   Description. Male( Fig.14) about 8.5 mmlong. Cephalothorax trapezoid, broadest at PLE level (CW = 84% of CL) and moderately low ( CH= 44% of CL), pale brown, covered with scattered fine, brown hairs ( Figs 14B–C). Surrounding of PLE black, others surrounded brown. Clypeus moderately narrow, dark brown, densely covered with long, pallid setae ( Fig. 14B). Chelicerae pale brown, with scattered brown hairs, armament as in diagnosis. Endites and labium orange with yellow anterior margins. Sternum yellow. Abdomen elongate-ovoid, yellow, sparsely covered with brown hairs and with pattern of longitudinal pallid area, bordered with brownish colour. Venter yellowish, somewhat darker on sides and centrally ( Fig. 14D). Spinnerets dark yellow. Legs orange, with darker femora. Pedipalps orange, brown haired. Palpal organ ( Figs 14G–J) tegulum moderately narrow, embolus distally set, spermophore slightly meandering, tibia about 75% of cymbium length, retrolateral tibial apophysis slender. Dimensions. CL 3.60, CW 3.04, CH1.60, AEW 2.42, PEW 2.60, EFL 1.28, AL 4.80, AW 2.48, L1 13.52 (3.60+3.00+3.60+2.20+1.12).  Femaleunknown ( typespecimen lacking).