Thaiderces ganlan 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/177CD9B3-65CA-4E72-B5FB-A253B6A0C7A0
taxon LSID	lsid:zoobank.org:act:177CD9B3-65CA-4E72-B5FB-A253B6A0C7A0
treatment provided by	ZooKeys by Pensoft
scientific name	Thaiderces ganlan Li & Chang
status	sp. nov.

Treatment

Thaiderces ganlan Li & Chang sp. nov. Figs 1H View Figure 1 , 2E View Figure 2 , 7 View Figure 7 , 8 View Figure 8 , 28E View Figure 28 , 29 View Figure 29

Types.

Holotype: ♂ (IZCAS), Myanmar, Chin State, roadside between Kampellet to Nat Ma Taung National Park, 21°13.436'N, 93°58.819'E, 2402 m, 1.V.2017, Wu J. and Chen Z. Paratype: 1♀ (IZCAS), same data as holotype.

Etymology.

The species name is a noun in apposition derived from the Chinese pinyin gănlăn (olive) and refers to the structure of the bulb that resembles an olive or a rugby ball ( Fig. 8A View Figure 8 ).

Diagnosis.

Diagnostic features of males are discussed under T. peterjaegeri sp. nov. Females of T. ganlan sp. nov. can be distinguished by a pair of twisted ribbon-liked spermathecae, with globular distal ends two times wider than stalk (vs. spermathecae with globular heads three times wider than stalk in T. tuoyuan sp. nov., Fig. 6A View Figure 6 ).

Description.

Male (holotype). Total length 1.63; carapace 0.63 long, 0.63 wide; abdomen 1.00 long, 0.75 wide. Carapace round and brown with 3 longitudinal brown bands, lateral bands three times wider than the median band ( Fig. 7C View Figure 7 ). Chelicerae brown ( Fig. 28E View Figure 28 ). Clypeus dark brown medially and light brown laterally. Endites light brown. Labium dark brown. Sternum with dark brown pattern. Abdomen brown and elongated, dorsum with complex yellow dotted patterns, anteroventrally brown with pair of dark brown circular patches followed by a light brown elliptical patch, posterior part with a pair of yellow dotted lines laterally and a V-shaped mark medially. Legs uniformly brown; measurements: I 5.23 (1.40, 0.20, 1.60, 1.25, 0.78), II 4.99 (1.09, 0.15, 1.41, 1.25, 1.09), III 3.54 (0.94, 0.25, 0.90, 0.90, 0.55), IV 4.80 (1.20, 0.20. 1.40, 1.25, 0.75). Palp with scattered purplish spots ( Fig. 8C, D View Figure 8 ): femur three times longer than patella; patella not swollen, tibia 2/3 the length of femur; cymbium dark with concentrated purplish spots, half the length of femur; bulb light yellow and elliptical, with a distinct protrusion arising distally, adjacent to embolus; embolus thick and branched, arising distally, almost equal in length to the entire bulb ( Fig. 8A View Figure 8 ).

Female (Paratype). General features and coloration similar to that of male ( Fig. 7D, E View Figure 7 ). Measurements: total length 2.03; carapace 0.78 long, 0.75 wide; abdomen 1.25 long, 0.94 wide. Leg measurements: I 5.23 (1.28, 0.32, 1.60, 1.25, 0.78), II 4.84 (1.28, 0.32, 1.40, 1.09, 0.75), III missing, IV 5.61 (1.44, 0.32, 1.60, 1.50, 0.75). Endogyne with a pair of twisted ribbon-liked spermathecae with long stalks and globular heads, heads 2 times wider than stalks, stalks almost equal to the interdistance of stalk bases ( Fig. 7A View Figure 7 ).

Distribution.

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