Opisthoncus quadratarius (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 quadratarius (L. Koch, 1867)

( Fig. 25 )

Attus quadratarius Koch L. 1867: 227 .

Opisthoncus quadratarius: Keyserling. 1882: 1337 ; Rainbow 1911: 310, Żabka, 1991: 47.

Type material. 1F, 1 juv. Syntypes, ZMH, Mus. Godeffroy 2258, Australia: Brisbane [Queensland].

Diagnosis. Cheliceral retromargin with 4 fused teeth ( Fig. 25 E). Copulatory openings relatively small, oriented mid-anteriorly, insemination ducts moderately short, membranous parts coiled in anterior part of epigyne in single circles, intermediate ducts curved and looped as in Fig. 25 H, spermathecae relatively large.

Description. Female ( Fig. 25 ) about 9 mm long. Cephalothorax round and moderately high (CW = 90% of CL, CH = 54% of CL), brown, somewhat lighter in eye field, clothed in recumbent, pallid scales, with paler markings around eyes and central protuberance ( Figs 20 B–C). Surrounding of eyes dark brown. Cheeks with oblique scales ( Fig. 25 D). Clypeus brown, densely covered with pallid scales and setae, also the base of chelicerae, the latter brown, with dentition as in diagnosis. Endites and labium brown, with yellow anterior margins. Sternum relatively wide, orange, with scattered fine, pallid hairs ( Fig. 25 F). Abdomen yellowish, mottled orange, with rather indistinct paler longitudinal medial area, bordered by four brownish patches. Spinnerets orange. Venter pale yellow, with elongate stripes of small orange dots. Pedipalps orange. Legs orange, with pallid scales on dorsolateral surface of coxae, trochanters and femora. Epigyne as in Figs 25 G–H.

Dimensions. CL 3.68, CW 3.32, CH 2.00, AEW 2.32, PEW 2.40, EFL 1.28, AL 5.40, AW 2.84, L1 10.15 (2.88+2.35+2.40+1.64+0.88).

Male unknown.

Figures

FIGURE 20. Opisthoncus necator L. Koch, 1881, male syntype. A: original drawings from Koch & Keyserling (1881); B – C: general appearance, dorsal (with shape of cephalothorax) and ventral views; D – E: cephalothorax, dorso-frontal (with chelicera) and frontal views; F: chelicerae, ventral view; G – J: palpal organ, ventral and retrolateral views. Scale bars B – D: 1 mm; H, J: 0.2 mm.

FIGURE 25. Opisthoncus quadratarius (L. Koch, 1867), female syntype. A: original drawings from Koch & Keyserling (1867); B – C: general appearance, dorsal and dorso-lateral views; D: cephalothorax, frontal view; E: chelicerae, ventral view; F: sternum; G – H: epigyne and its internal structures. Scale bars B, C: 1 mm; G –– H: 0.15 mm.