Thaiderces haima 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/91D1E11C-CF9D-48FB-86D0-7720F2ACA4B8
taxon LSID	lsid:zoobank.org:act:91D1E11C-CF9D-48FB-86D0-7720F2ACA4B8
treatment provided by	ZooKeys by Pensoft
scientific name	Thaiderces haima Li & Chang
status	sp. nov.

Treatment

Thaiderces haima Li & Chang sp. nov. Figs 1L View Figure 1 , 2I View Figure 2 , 20 View Figure 20 , 21 View Figure 21 , 28C View Figure 28 , 29 View Figure 29

Types.

Holotype: ♂ (IZCAS), Thailand, Tak Province, Uaphang District, Umphang Subdistrict, Huai Lao Poo Cave, 15°57.680'N, 98°52.510'E, 534 m, 16.XI.2016, Zhao H., Li Y., Chen Z. Paratype: 1♀ (IZCAS), same data as holotype.

Etymology.

The species name is a noun in apposition derived from the Chinese pinyin hăIimă (seahorse) and refers to the distal bending of bulb that resembles the head of a seahorse.

Diagnosis.

See diagnosis of T. fengniao sp. nov.

Description.

Male (holotype). Total length 1.80; carapace 0.60 long, 0.70 wide; abdomen 1.20 long, 0.90 wide. Carapace round and brown, with three longitudinal dark brown bands, lateral bands two times wider than the median band ( Fig. 20C View Figure 20 ). Chelicerae brown ( Fig. 28C View Figure 28 ). Clypeus dark brown medially and light brown laterally. Endites light brown. Labium dark brown. Sternum with dark brown pattern. Abdomen elongated, dorsum with indistinct brown pattern, posterior with brown stripes, anteroventrally with dark brown semi-circle, posterior part with pair of pale yellow vertical dotted lines laterally and a funnel-shaped mark medially. Legs uniformly brown; measurements: I missing, II missing, III 4.78 (1.28, 0.25, 1.38, 1.25, 0.62), IV 7.12 (1.75, 0.31, 2.12, 2.00, 0.94). Palp ( Fig. 21 A–D View Figure 21 ): femur 3 times longer than patella; patella not swollen, tibia almost equal in length to femur; cymbium scattered with purplish spots anteriorly, 1/4 the length of femur; bulb brown, lanceolate with bent distal part, presence of embolic stubble on embolic stalk, embolic stalk 1/3 the width of the bulb, embolus short, arises distally, resembles the head of a seahorse ( Fig. 21A View Figure 21 ).

Female (paratype). General features and coloration similar to that of the male ( Fig. 20D, E View Figure 20 ). Measurements: total length 1.60; carapace 0.50 long, 0.63 wide; abdomen 1.10 long, 0.70 wide. Leg measurements: I missing, II 4.29 (1.09, 0.16, 1.25, 1.09, 0.70), III 4.92 (1.25, 0.16, 1.41, 1.30, 0.80), IV missing. Endogyne: two pairs of circular spermathecae, lateral spermathecae embedded with ovoid duct ( Fig. 20A View Figure 20 ).

Distribution.

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