Thaiderces zuichun Li & Chang sp. nov. Figs 2H, 13, 27G, 29

Types.

Holotype: ♀ (IZCAS), Thailand, Satun Province, Thung Wa District, Cave without name, 07°3.04278'N, 99°48.03915'E, 28 m, 01.XII.2013, F. Ballarin.

Etymology.

The species name is a noun in apposition derived from the Chinese pinyin zuǐchún (lip) and refers to the overall structure of the spermathecae which is similar to a human lip.

Diagnosis.

Thaiderces zuichun sp. nov. is similar to T. miantiao sp. nov. but can be easily distinguished by a pair of stalked spermathecae with an oblong distal part connected to a wavy horizontal duct (vs. two pairs of strongly twisted spermathecae in T. miantiao sp. nov.).

Description.

Female. Total length 1.58; carapace 0.50 long, 0.63 wide; abdomen 1.08 long, 0.78 wide. Carapace round and brown, with three longitudinal purplish bands, median band rather pale and only half the length of the carapace, lateral bands three times wider than the median band (Fig. 13C). Chelicerae brown (Fig. 27G). Clypeus purple. Endites purple. Labium brown. Sternum with purplish pattern. Abdomen elongated, posterior with indistinct dark brown pattern (Fig. 13C), ventrum with indistinct brown pattern, anterior epigastric area forming a semi-circle (Fig. 13D). Legs uniformly brown; measurements: I missing, II 4.13 (1.09, 0.15, 1.25, 1.09, 0.55), III 3.45 (0.94, 0.16, 0.94, 0.94, 0.47), IV 4.70 (1.20, 0.20, 1.40, 1.30, 0.60). Endogyne: a pair of stalked spermathecae, with oblong distal parts, stalk almost equal in length to and half the width of the oblong distal part, connected by a wavy horizontal duct (Fig. 13A)

Male. Unknown.

Distribution.

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