Trachelas ventriosus, Tang & Yan & Zhao & Peng, 2024

Tang, Gang, Yan, Wen-long, Zhao, Yi & Peng, Xian-jin, 2024, Description of two new species of the genus Trachelas L. Koch, 1872 and the male of T. gaoligongensis Jin, Yin & Zhang, 2017 from China (Araneae, Trachelidae), ZooKeys 1215, pp. 127-138 : 127-138

Trachelas ventriosus sp. nov.

Figs 6 , 7 C, D

Type material.

Holotype • ♀ ( HNU - Wang 060528-1); China, Yunnan Prov., Tengchong County, Houqiao Township ; 25.35391 ° N, 98.25488 ° E; 1785 m a. s. l.; 28 May 2006; Xin-Ping Wang, Peng Hu leg.

Etymology.

The species name is derived from the Latin “ ventriosus ” (pot-bellied), referring to its large abdomen; adjective.

Diagnosis.

The female of this new species (Figs 6 E, F , 7 C, D ) resembles that of Trachelas fasciae Zhang, Fu & Zhu, 2009 (see Zhang et al. 2009, figs 21, 22) in having symmetrical connecting ducts and the primary spermathecae are near the genital groove but differs as follows: (1) the atrium occupies 3 / 4 of the genitalia in ventral view (vs. 1 / 3 of the genitalia); (2) the copulatory openings are posterior to the secondary spermathecae in ventral view (vs. anterior to the secondary spermathecae); (3) the secondary spermathecae are inverted V-shaped in dorsal view (vs. V-shaped); and (4) the primary and secondary spermathecae are far away from each other in dorsal view (vs. partially overlapping).

Description.

Female (holotype) (Fig. 6 A-D ). Total length 4.47. Carapace 1.59 long, 1.33 wide; abdomen 2.87 long, 1.89 wide. Carapace brown, fovea black and slender, radial grooves distinct. Chelicerae light brown, with two promarginal and three retromarginal teeth. Sternum and labium light brown, partly covered with black setae. Eye sizes and interdistances: AME 0.12, ALE 0.12, PME 0.12, PLE 0.12, AME - AME 0.06, AME - ALE 0.01, PME - PME 0.10, PME - PLE 0.08, ALE - PLE 0.07. MOA 0.26 long, anterior width 0.24, posterior width 0.30. Clypeus height 0.11. Legs light brown alternating with dark brown. Leg measurements: leg I 4.56 (1.43, 1.65, 0.81, 0.67), II 4.82 (1.44, 1.62, 1.22, 0.54), III 3.02 (0.83, 1.05, 0.72, 0.42), IV 4.80 (1.32, 1.71, 1.23, 0.54). Leg formula: 2413. Abdomen oval, apricot-white; dorsum with eight black-brown chevrons decreasing in size from anterior to posterior, with a longitudinal black-brown stripe in middle, and several brown markings distributed irregularly; venter with two blurry gray longitudinal stripes. Spinnerets covered with black setae and parenthesis-shaped marks laterally.

Epigyne (Figs 6 E, F , 7 C, D ). Atrium longer than wide, copulatory openings located on posterior of epigyne; connecting ducts long and symmetrical; secondary spermathecae close to each other; primary spermathecae close to genital groove, connected by short fertilization ducts.

Male. Unknown.

Distribution.

Known only from the type locality (Fig. 8 ).

Figures

Figure 6. Trachelas ventriosus sp. nov., female (holotype) A habitus, dorsal view B ditto, ventral view C ocular area, dorsal view D carapace, frontal view E genitalia, ventral view F ditto, dorsal view. Scale bars: 0.5 mm (A-D); 0.3 mm (E, F).

Figure 7. A, B Trachelas kavanaughi sp. nov. C, D Trachelas ventriosus sp. nov. A genitalia, ventral view B ditto, dorsal view C ditto, ventral view D ditto, dorsal view. Scale bars: 0.3 mm.

Figure 8. Collection localities of Trachelas gaoligongensis Jin, Yin & Zhang, 2017, Trachelas kavanaughi sp. nov. and Trachelas ventriosus sp. nov.