Lysiteles tangi Wang & Mi, 2024

Wang, Cheng, Gan, Jiahui & Mi, Xiaoqi, 2024, Two new species of Lysiteles Simon, 1895 from Cibagou National Nature Reserve, Xizang, China (Araneae, Thomisidae), Biodiversity Data Journal 12, pp. 120347-120347 : 120347

Lysiteles tangi Wang & Mi sp. nov.

Materials

Type status: Holotype. Occurrence: individualID: TRU-TD-XZ-009; sex: male; occurrenceID: 34D4A470-E496-54CD-8C0A-D1DEED658CCC; Taxon: scientificName: Lysiteles tangi sp. nov.; Location : country: China; stateProvince: Xizang Autonomous Region ; county: Zayu ; locality: Cibagou National Nature Reserve ; verbatimElevation: 2880 m; verbatimLatitude: 28°46.62′N; verbatimLongitude: 97°0.86′E; Identification: identifiedBy: Cheng Wang; Event: samplingProtocol: beating shrubs; year: 2023; month: June; day: 24 Type status: Holotype. Occurrence: individualID: TRU-TD-XZ-010-025; sex: 6males, 10 females; occurrenceID: 56128EA8-3090-547A-B07E-6361FA058159; Taxon: scientificName: Lysiteles tangi sp. nov.; Location : country: China; stateProvince: Xizang Autonomous Region ; county: Zayu ; locality: Cibagou National Nature Reserve ; verbatimElevation: 2880 m; verbatimLatitude: 28°46.62′N; verbatimLongitude: 97°0.86′E; Identification: identifiedBy: Cheng Wang; Event: samplingProtocol: beating shrubs; year: 2023; month: June; day: 24

Description

Male (holotype, TRU-TD-XZ-009). Total length 3.76. Carapace 1.88 long, 1.67 wide; Abdomen 1.91 long, 1.24 wide. Eye sizes and inter-distances: AME 0.13, ALE 0.24, PME 0.08, PLE 0.18; AME-AME 0.16, AME-ALE 0.13, PME-PME 0.28, PME-PLE 0.32; MOA 0.32 long, front width 0.41, back width 0.46. Measurements of legs: I 7.49 (2.20, 0.83, 1.88, 1.63, 0.95), II 7.64 (2.33, 0.78, 1.93, 1.65, 0.95), III 4.98 (1.50, 0.63, 1.25, 1.00, 0.60), IV 5.08 (1.60, 0.55, 1.25, 1.08, 0.60). Carapace (Fig. 4 E) pale yellow, with slightly elevated cephalon and sub-oval thorax. Chelicerae, endites and labium pale yellow. Endites (Fig. 4 F) longer than wide, bearing dense inner-distal brown setae. Sternum (Fig. 4 F) pale yellow, with re-curved anterior margin and gradually narrowed posteromedially. Legs pale to dark yellow, with sparse dark brown spots. Abdomen (Fig. 4 E, F) elongated, dorsum pale yellow to dark, with antero-marginal sliver spots, pair of median muscle depressions and prominent dark marking; venter pale to dark, with centre, longitudinal, dark band. Palp (Fig. 3 A, B): tibia longer than wide; ventral tibial apophysis (VTA) short, slightly curved inwards medially and blunt apically; retrolateral tibial apophysis (RTA) strongly sclerotised, sheet-shaped, widened at base, slightly curved towards retrolateral side distally; cymbium longer than wide; bulb flat, with sperm duct extending along the sub-margin; embolus (E) strongly sclerotised, originating from antero-apical portion of bulb, retrolaterally extending, slightly curved medially and with pointed end.

Female (paratype, TRU-TD-XZ-016). Total length 3.35. Carapace 1.57 long, 1.46 wide; Abdomen 1.81 long, 1.46 wide. Eye sizes and inter-distances: AME 0.14, ALE 0.23, PME 0.08, PLE 0.17; AME-AME 0.17, AME-ALE 0.13, PME-PME 0.29, PME-PLE 0.32; MOA 0.32 long, front width 0.42, back width 0.46. Measurements of legs: I 5.46 (1.63, 0.68, 1.30, 1.10, 0.75), II 5.51 (1.65, 0.63, 1.35, 1.13, 0.75), III 3.80 (1.15, 0.50, 0.95, 0.70, 0.50), IV 3.98 (1.25, 0.50, 0.95, 0.78, 0.50). Habitus (Fig. 4 G, H) similar to that of male, except with irregular dark brown markings on carapace. Epigyne (Fig. 4 A-D): wider than long, with broad, labiate, anterior transversal sclerotised plate (TSP) almost equal to the epigynal width; copulatory openings beneath the median portion of the base of transversal sclerotised plate; copulatory ducts (CD) short, strongly curved medially; spermathecae (S) almost spherical, separated from each other about half their diameter; fertilisation ducts (FD) originating from the inner-base of spermathecae, lamellar.

Diagnosis

Lysiteles tangi sp. nov. closely resembles that of L. bhutanus Ono, 2001, no matter in habitus nor copulatory organs, but it can be distinguished by the following: 1) the retrolateral tibial apophysis is widened at base and longer than the ventral tibial apophysis in retrolateral view (Fig. 3 B), versus almost equal in width and almost as long as the ventral tibial apophysis in L. bhutanus ( Ono 2001: figs 46, 47); 2) the copulatory openings are below the most anterior portions of spermathecae (Fig. 4 C, D), versus beyond the most anterior portions of spermathecae in L. bhutanus ( Ono 2001: fig. 50). The female is also similar to that of L. linzhiensis Hu, 2001 in having similar habitus and epigyne, but it can be easily distinguished by the transversal sclerotised plate, which is labiate and almost equal in width to epigyne (Fig. 4 A, B), versus sub-triangular and about half the epigynal width in L. linzhiensis ( Hu 2001: fig. 8-206-2).

Etymology

The specific name is a patronym of the late Chinese arachnologist, Dr. Guo Tang, who has significantly contributed to the taxonomy of Chinese Lysiteles ; noun (name) in genitive case.

Distribution

Known only from the type locality in Xizang, China (Fig. 5 ).

Taxon discussion

The pairing has been supported by the unpublished molecular evidence.

Figures

Figure 3. Male palp of Lysiteles tangi sp. nov., holotype (TRU-TD-XZ- 009); A ventral view; B retrolateral view. Scale bars = 0.1 mm.

Figure 4. Male holotype (TRU-TD-XZ- 009) and female paratype (TRU-TD-XZ- 016) of Lysiteles tangi sp. nov.; A, B epigyne, ventral view; C, D vulva, dorsal view; E holotype habitus, dorsal view; F ditto, ventral view; G female paratype habitus, dorsal view; H ditto, ventral view. Scale bars = (A-D) 0.1 mm; (E-H) 0.5 mm.

Figure 5. Distributional records of the Lysiteles spp.