Ctenus lishuqiang, Jager, 2012

Jäger, Peter, 2012, Asian species of the genera Anahita Karsch 1879, Ctenus Walckenaer 1805 and Amauropelma Raven, Stumkat & Gray 2001 (Arachnida: Araneae: Ctenidae), Zootaxa 3429 (1), pp. 1-63 : 34-35

Ctenus lishuqiang spec. nov.

Figs 39 , 138–145

Type material. Holotype female ( SMF), China, Sichuan Province, Baoxing County, Tuanjie village , N 30°25.126', E 102°44.38', 1111 m altitude, secondary forest, leaf litter, by hand, by day, P. Jäger leg. 28.VI.2004.

Etymology. This species is named for Shuqiang Li from Beijing, honouring his enormous contributions to arachnological knowledge in China; name in apposition.

Diagnosis. Medium-sized Ctenidae (total length female 13.0). Distinguished from other Ctenus spp. by the acute epigynal teeth and by the two bulging areas of the epigynal plate close to the teeth ( Figs 138–139 ).

Description. Female (holotype). PL 6.3, PW 5.1, AW 3.5, OL 6.7, OW 5.0. Eye diameters and interdistances: AME 0.31, ALE 0.26, PME 0.42, PLE 0.38, AME–AME 0.20, AME–ALE 0.41, PME–PME 0.21, PME–PLE

0.50, AME–PME 0.13, ALE–PLE 0.15, clypeus AME 0.16, clypeus ALE 0.55. Palp and leg measurements: palp 6.4 (2.1, 1.2, 1.5, -, 1.6), I 14.4 (4.1, 2.3, 3.8, 3.0, 1.2), II 13.6 (4.0, 2.2, 3.3, 2.9, 1.2), III 12.4 (3.5, 2.0, 2.7, 2.9, 1.3), IV 16.6 (4.4, 1.9, 3.9, 4.7, 1.7). Leg formula 4123. Spination of palp and legs: palp 131, 100, 1211, 1012; femora I p021, d111, r211, II p112(3), d111, r 111, III p112, d111, r 112, IV p112, d111, r001; patellae I–II 000, III– IV 101; tibiae I–II v22222, III–IV p11, d111, r11, v222; metatarsi I–II v222, III p112, d010, r112, v222, IV p112, d010, r112, v2122. Chelicerae with 3 promarginal, 4 retromarginal teeth, and with c. 14 denticles most of them in patch close to promarginal teeth. Retromargin of chelicerae close to fang base with 8–9 thin bristles. Leg claw I with 1(2), leg claw II with 2, leg claws III–IV with 3 secondary teeth. Position of tarsal organ: I 0.80, II 0.79, III 0.62, IV 0.60.

Copulatory organ as in diagnosis ( Figs 138–141 ). Epigynal field wider than long, with two anterio-lateral patches fused with field, with one pair of slit sense organs anterio-laterally. Median plate anteriorly narrow, widening gradually and not narrowing posteriorly (as for instance in C. theodorianum spec. nov.); lateral teeth arising at anterior part, pointing posterio-medially. Internal duct system with lateral folds diverging posteriorly. Spermathecae directed towards each other, widened medially, separated by less of their diameter, internally with a relatively large transverse oval chamber between spermathecae and fertilisation ducts, the latter acuminate and pointing medially.

Colour ( Figs 142–143 ). Reddish-brown with slightly darker pattern. Dorsal shield of prosoma with characteristic slightly lighter median band, widened behind eyes, constricted behind distinctly marked fovea. Sternum and ventral coxae dark yellowish-brown, partly with indistinct diffused black colour. Labium and gnathocoxae dark reddish-brown with lighter distal lips. Chelicerae dark reddish-brown. Palps and legs reddishbrown with only indistinct markings. Dorsal opisthosoma dark brown with anterior margin and heart region with lighter area. Ventral opisthosoma dark brown with two rows of lighter spots, distal spinnerets light. For colour of live holotype see Figs 144–145 .

Male. Unknown.

Distribution. Known only from the type locality ( Fig. 39 : 6).

Figures

FIGURE 39. Records of Ctenus spp. in South and Southeast Asia. 1 Between Chitre and Chandrung, Nepal. 2–5 Burma (2

FIGURES 138–141. Ctenus lishuqiang spec. nov., holotype female from Baoxing, Sichuan, China. 138 Epigyne, ventral; 139 Epigyne, posterior; 140 Vulva, dorsal; 141 Schematic course of duct system, dorsal. I + II—two chambers of spermathecae, chamber II functionally between chamber I and fertilisation duct.

FIGURES 142–145. Ctenus lishuqiang spec. nov., holotype female from Baoxing, Sichuan, China, habitus (142, 144 dorsal; 143 ventral; 145 lateral). 144–145 Living holotype female with egg-sac.