Thaiderces shuzi Li & Chang

Chang, Wan-Jin & Li, Shuqiang, 2019, Fourteen new species of the spider genus Thaiderces from Southeast Asia (Araneae, Psilodercidae), ZooKeys 869, pp. 103-146 : 103

publication ID	https://dx.doi.org/10.3897/zookeys.869.35546
publication LSID	lsid:zoobank.org:pub:AFF62E38-4FD4-4E5D-9D92-3EC97E4A4368
persistent identifier	https://treatment.plazi.org/id/D3DB4169-236B-4C6E-85ED-98C160CED4F3
taxon LSID	lsid:zoobank.org:act:D3DB4169-236B-4C6E-85ED-98C160CED4F3
treatment provided by	ZooKeys by Pensoft
scientific name	Thaiderces shuzi Li & Chang
status	sp. nov.

Treatment

Thaiderces shuzi Li & Chang sp. nov. Figs 1J View Figure 1 , 2M View Figure 2 , 3 View Figure 3 , 4 View Figure 4 , 27C View Figure 27 , 29 View Figure 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 View Figure 4 ) 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 View Figure 3 ) (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 View Figure 3 ). Chelicerae brown ( Fig. 27C View Figure 27 ). Clypeus pale yellow. Endites pale yellow. Labium light brown. Sternum with purplish pattern. Abdomen elongated, dorsum with 3 distinct brown spots medially ( Fig. 3C View Figure 3 ), 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 View Figure 4 ): 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 View Figure 4 ).

Female (Paratype). General features and coloration similar to that of male ( Fig. 3 D–E View Figure 3 ). 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 View Figure 3 ).

Distribution.

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