Thaiderces shuzi Li & Chang sp. nov. Figs 1J, 2M, 3, 4, 27C, 29

Types.

Holotype: ♂ (IZCAS), Thailand, Prachuap Kiri Khan Province, Hua Hin District, Nong Phiap Subdistrict, Dao Cave, 12°35.449'N, 99°43.692'E, 123 m, 30.X.2014, Zhao H., Li Y., and Chen Z. Paratype: 1♀ (IZCAS), same data as holotype.

Etymology.

The species name is a noun in apposition derived from the Chinese pinyin shūz ǐ (comb) and refers to the serrated stubble on the embolic stalk that resembles a comb.

Diagnosis.

Males of T. shuzi sp. nov. can be distinguished from all other species of the genus by the unique structure of the male bulb with a long embolic stalk bearing serrated embolic stubble (Fig. 4A) that resembles a comb (vs. absence of serrated embolic stubble in congeners); females can be differentiated from congeners by two pairs of stalked spermathecae with globose distal parts (Fig. 3A) (vs. one pair of spermathecae or spermathecae without stalk in congeners).

Description.

Male (holotype). Total length 1.78; carapace 0.78 long, 0.70 wide; abdomen 1.00 long, 0.70 wide. Carapace round and pale yellow (Fig. 3C). Chelicerae brown (Fig. 27C). Clypeus pale yellow. Endites pale yellow. Labium light brown. Sternum with purplish pattern. Abdomen elongated, dorsum with 3 distinct brown spots medially (Fig. 3C), anteroventrally with a pair of circular purplish patches, posterior part with a pattern ranging from light purple to dark purple. Legs uniformly brown; measurements: I 5.29 (1.40, 0.20, 1.56, 1.25, 0.88), II 7.36 (2.00, 0.20, 2.19, 1.88, 1.09), III 5.27 (1.56, 0.31, 1.40, 1.30, 0.70), IV 7.25 (2.00, 0.25, 2.20, 1.80, 1.00). Palp (Fig. 4 A–D): femur slender, 5 times longer than patella; patella not swollen, tibia almost equal in length to femur, basally swollen (length/width = 2.30); cymbium pale, three times shorter than femur; bulb light yellow, spatulate, with a long embolic stalk bearing serrated stubble, embolic stalk almost equal in length to the bulb, 2/3 the width of the bulb; embolus straight and short apically (Fig. 4B).

Female (Paratype). General features and coloration similar to that of male (Fig. 3 D–E). Measurements: total length 2.00; carapace 0.70 long, 0.70 wide; abdomen 1.30 long, 1.00 wide. Leg measurements: I‒II missing, III 4.54 (1.28, 0.25, 1.25, 1.13, 0.63), IV 4.51 (1.25, 0.25, 1.25, 1.13, 0.63). Endogyne: two pairs of stalked spermathecae bearing globose distal parts, lateral spermathecae directed horizontally, medial spermathecae pointed vertically, width of globose part ca. 3 times wider than stalk. (Fig. 3A).

Distribution.

Known only from the type locality (Fig. 29).