Althepus jiandan Li et Li

Liu, Chang, Li, Fengyuan, Wongprom, Prasit, Zheng, Guo & Li, Shuqiang, 2017, Eleven new species of the spider genus Althepus Thorell, 1898 (Araneae, Ochyroceratidae) from Thailand, Zootaxa 4350 (3), pp. 469-499: 477

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Althepus jiandan Li et Li

sp. nov.

Althepus jiandan Li et Li  sp. nov.

Figs 6–7View FIGURE 6View FIGURE 7, 21–22View FIGURE 21View FIGURE 22

Type material. Holotype: Male ( IZCAS), Thailand, Yala Province, Than To District, the evergreen forest in front of the Krasaeng Cave entrance, 06°10.870'N, 101°11.605'E, altitude 155m, 23 October 2013GoogleMaps  . Paratypes: 4 females and 2 males, same data as holotype ( IZCAS)GoogleMaps  .

Etymology. The specific name is derived from the Chinese pinyin 'jiǎn dān', which means 'simple', referring to the simple marks on carapace; noun in apposition.

Diagnosis. The species resembles A. xianxi  sp. nov. ( Figs 19–20View FIGURE 19View FIGURE 20) with the male palp, but can be distinguished by the large, forked lamellar structures on the distal part of the conductor ( Figs 6A –DView FIGURE 6) as well as by the strongly twisted spermathecae ( Fig. 7EView FIGURE 7).

Description. Male (holotype). Total length 3.40; carapace 1.00 length, 1.26 width; abdomen 2.03 length, 1.10 width. Carapace rounded ( Fig. 7GView FIGURE 7), yellowish, with three longitudinal brown bands of different width, among them, the middle shortened to triangular band around the eyes. Anterior margin of thoracic region distinctly elevated. Clypeus brown. Cheliceral promargin with two teeth, followed by a lamina, retromargin with two small teeth ( Fig. 21DView FIGURE 21). Labium brown, with two light rounded areas basally. Sternum yellow, with two irregular brown lines on each side. Abdomen elongate, with complex patterns of white and dark-brown dorsally and ventrally. Legs brown, femur and tibia annulated with white. Leg measurements: I 23.46 (6.22, 0.40, 6.09, 9.28, 1.47), II 23.29 (6.22, 0.40, 5.77, 9.17, 1.73), III 13.05 (4.23, 0.40, 3.85, 5.13, 1.15), IV 23.93 (6.35, 0.40, 6.22, 9.04, 1.92). Male palp ( Figs 6A –DView FIGURE 6): tarsus with three slightly curved, serrated bristles at the top of cymbial protrusion ( Fig. 6CView FIGURE 6), one hooked spine with tip directed towards proximally ( Figs 6A, DView FIGURE 6), one strong spine and one bristle arising from tubercles; bulb bright yellow, ovate; embolus arising retrolatero-distally from bulb, curved and extremely long distally; conductor arising prolatero-distally from bulb with large and forked structures on the distal part; embolus and conductor widely separated (the distance is almost equal to diameter of bulb).

Female (paratype). Similar to male in coloration and general features ( Figs 7H –IView FIGURE 7), but with a smaller body size. Internal genitalia with a pair of strongly twisted and swollen transparent spermathecae ( Fig. 7EView FIGURE 7). Measurements: total length 3.00; carapace 0.92 length, 1.09 width; abdomen 1.96 length, 1.33 width. Legs I 25.77 (6.09, 0.32, 6.73, 11.03, 1.60), legs II 15.90 (4.23, 0.32, 4.17, 5.83, 1.35), III 12.50 (3.21, 0.32, 2.88, 3.72, 2.37), IV 16.09 (4.55, 0.32, 4.49, 5.38, 1.35).

Variation. Carapace 1.00–1.19 length, 1.13–1.26 width, tibia I 7.50–9.29 in males. Carapace 0.92–1.00 length, 1.02–1.09 width, tibia I 6.47–6.73 (n=3; leg I lost in other specimen) in females.

Distribution. Known only from the type locality ( Fig. 22View FIGURE 22).


Institute of Zoology, Chinese Academy of Sciences