Opisthoncus grassator Keyserling, 1883, Keyserling, 1883

Gardzińska, Joanna & Żabka, Marek, 2013, Redescription of the genus Opisthoncus L. Koch, 1880 (Araneae: Salticidae), Zootaxa 3717 (4), pp. 401-447: 417-420

publication ID

http://dx.doi.org/10.11646/zootaxa.3717.4.1

publication LSID

lsid:zoobank.org:pub:55248289-2E05-4F07-BFC7-99AFED7D4E93

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http://treatment.plazi.org/id/F45B8781-3312-FFBE-94D0-FD5EB708FCBE

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Plazi

scientific name

Opisthoncus grassator Keyserling, 1883
status

 

Opisthoncus grassator Keyserling, 1883  

( Figs 11 View FIGURE 11 , 12 View FIGURE 12 )

Opisthoncus grassator: Keyserling 1883: 1457   ; Simon 1903: 826, 827, 828, 829; Rainbow 1911: 309; Żabka, 1991: 45.

Type material. 1 M, 1 F Syntypes, ZMH, Mus. Godeffroy 7728, Australia: Peak Downs.

Diagnosis. Female chelicerae with four-cuspidate fissident tooth ( Figs 11 View FIGURE 11 G –H). In male retromargin with 3 teeth, located close to each other, promargin with distal tooth somewhat larger than the proximal one ( Fig. 12 View FIGURE 12 G); fangs with internal outgrowths ( Fig. 12 View FIGURE 12 C); frontal spurs well developed and cone-like, ventral ones teeth-like and moderately small ( Figs 12 View FIGURE 12 C, F, G). Tegulum round and small, embolus elongate, arising at 3 o’clock. Copulatory openings relatively large, insemination ducts wide in initial parts, narrowing distally, coiled in two circles at membranous part, intermediate ducts curved and looped as in Fig. 11 View FIGURE 11 J. Spermathecae relatively small, accessory glands elongate. Posterior notch round and moderately deep. Differs from similar O. alborufescens   mainly by orientation of spermathecae and relatively longer accessory glands. In comparison with close O. magnidens   armament of male chelicerae different, embolus somewhat shorter, spermathecae close to each other in anterior parts, accessory glands markedly longer.

Description. Female ( Fig. 11 View FIGURE 11 ) about 7 mm long. Cephalothorax round, broadest below PLE and moderately low (CW = 85 % of CL, CH = 46 % of CL), pale brown, covered with short, recumbent pallid scales and scattered brown hairs, cephalic protruberance darker ( Figs 11 View FIGURE 11 D –E). Surrounding of eyes brown, with orange scales. Clypeus moderately narrow, orange, covered with numerous pallid short scales and longer hairs ( Figs 11 View FIGURE 11 B –C). Chelicerae, endites and labium pale brown, the latter with yellow anterior margins. Sternum relatively round, yellow, with scattered fine, brown hairs ( Fig. 11 View FIGURE 11 F). Abdomen ovoid, yellow, with scattered brown hairs and pattern of longitudinal leaf-like pallid area, bordered in brown colour as in Fig. 11 View FIGURE 11 E. Venter yellowish, with central elongate stripes of small brown spots. Spinnerets yellow. Legs orange, with first pair somewhat darker than others. Pedipalps yellow. Epigyne as in Figs 11 View FIGURE 11 I –J

Dimensions. CL 2.60, CW 2.16, CH 1.20, AEW 1.68, PEW 1.80, EFL 0.92, AL 4.00, AW 2.16, L 1 6.00 (1.60 + 1.40 + 1.40 +1.00+ 0.60).

Male ( Fig. 12 View FIGURE 12 ) about 8.5 mm long. Cephalothorax round, broadest below PLE (CW = 89 % of CL, CH = 46 % of CL), pale brown, darker in distal part and covered with numerous, easily rubbing off, recumbent pale scales and scattered brown hairs ( Figs 12 View FIGURE 12 B, D). Surrounding of AME brown, other eyes surrounded in black. Clypeus very narrow, pale brown with brownish setae ( Fig. 12 View FIGURE 12 C). Cheliceral armament as in diagnosis, retromarginal teeth seem to be separated. Chelicerae, endites and labium brown, anterior margins of endites and labium yellow. Sternum wide, yellow, clothed in fine, brown hairs ( Fig. 12 View FIGURE 12 E). Abdomen elongate, yellow, with dorsal orange scutum, covered with scattered brown hairs, pattern of central pallid area similar to that observed in female, however hardly discoloured. Venter yellowish, with elongate stripes of small, brown spots. Spinnerets yellow. Legs orange-yellow. Pedipalps yellow. Structure of palpal organ ( Figs 12 View FIGURE 12 H –K): embolus arising retrolaterally, translucent part of spermophore not meandering, tibia about 50 % of cymbium length.

Dimensions. CL 3.50, CW 3.12, CH 1.60, AEW 2.00, PEW 2.08, EFL 1.18, AL 4.96, AW 2.32, L 1 12.20 (3.04 + 2.64 + 3.28 + 2.04 + 1.20).

Opisthoncus keyserlingi Żabka, 1991   ( Fig. 13 View FIGURE 13 )

Hasarius albiventris: Keyserling 1881: 1291   . Cytaea albiventris: Simon 1903: 815   .

Opisthoncus keyserlingi: Żabka, 1991: 45   .

Type material. 1 F holotype, Hasarius albiventris   , ZMH, Mus. Godeffroy 7669, Australia: Sydney [NSW].

Diagnosis. Retromarginal cheliceral tooth two-cuspidate ( Fig. 13 View FIGURE 13 D). Differs from O. abnormis   by details of epigyne: spermathecae close to each other in distal parts. Posterior notch round.

Description. Female ( Fig. 13 View FIGURE 13 ) about 4.5 mm long. Cephalothorax almost rectangular and moderately high (CW = 80 % of CL, CH = 50 % of CL), brown with paler cephalic part, sparsely covered with short pallid scales ( Figs 13 View FIGURE 13 A –B). Ocular area almost black. Clypeus moderately wide, pale brown, densely covered with whitish scales and setae ( Fig. 13 View FIGURE 13 C). Chelicerae pale brown, endites and labium the same colour, with yellow anterior margins. Sternum relatively narrow, yellow ( Fig. 13 View FIGURE 13 E). Abdomen with wide, longitudinal herring-bone pallid stripe, bordered by dark brown areas ( Figs 13 View FIGURE 13 A –B). Venter whitish, with dark brown side stripes ( Fig. 13 View FIGURE 13 F). Spinnerets yellow. Legs I and II orange, others yellow. Pedipalps yellow. Epigyne as in Fig. 13 View FIGURE 13 G.

Dimensions. CL 2.00, CW 1.60, CH 1.00, AEW 1.48, PEW 1.48, EFL 0.88, AL 2.48, AW 1.48, L 1 4.72 (1.60 +1.00+1.00+ 0.72 + 0.40).

Male unknown.