Taira yangi, Zhao & Wang & Irfan & Zhang, 2021

Zhao, Jing-Xia, Wang, Lu-Yu, Irfan, Muhammad & Zhang, Zhi-Sheng, 2021, Furtherrevisionofthemesh-webspidergenus TairaLehtinen, 1967 (Amaurobiidae) with the description of six new species, Zootaxa 5020 (3), pp. 457-488 : 479-481

Taira yangi sp. nov.

Figures 22–24

Type material. Holotype ♂ (SWUC-T-AM-17-01), CHINA: Yunnan: Dali City, Binzhou County, Mt. Jizu , Zhusheng Temple , 25°57.483′N 100°23.562′E, 2000 m, 19.II.2009, Z.Z. Yang . Paratypes (11 ♀): 6 ♀ (SWUC- T-AM-17-02~07), Mt. Jizu , Zhusheng Temple, Yulong Waterfall, 25°57.873′N 100°23.393′E, 2200 m, 22.V.2018, L.Y. Wang .

Etymology. The specific name comes from the family name of the collector Zi-Zhong Yang;

Diagnosis. Males of this new species resemble T. xuanenensis sp. nov. by having a similar interior branch on the dorsal tibial apophysis ( Figs 22C–E , 23C–E ). T. yangi males, however, can be differentiated from T. xuanenensis sp. nov. males by the following characters: interior branch of dorsal tibial apophysis spout-like and blunt in T. yangi sp. nov. ( Figs 22C , 23C ), whereas sharp in T. xuanenensis sp. nov.; median apophysis slender in T. yangi sp. nov. ( Figs 22D , 23D ), whereas crescent-shaped in T. xuanenensis sp. nov.; tegular apophysis D-shaped in T. yangi sp. nov., whereas heart-shaped in T. xuanenensis sp. nov. Females of the new species resemble T. gyaisiensis sp. nov. females by having reniform spermathecae and an anteriorly grooved median apophysis ( Figs 22A, B , 23F, G ), but can be differentiated by the following: epigynal teeth small, not overlapping with the median lobe in T. yangi sp. nov. ( Figs 22A , 23F ), whereas epigynal teeth large, covering most of the ventro-lateral area of the median lobe in T. gyaisiensis sp. nov.

Description. Male. Holotype ( Fig. 23A ) total length 8.09. Carapace 3.99 long, 2.80 wide; opisthosoma 4.14 long, 2.84 wide. Eye size and interdistances: AME 0.16, ALE 0.20, PME 0.18, PLE 0.19; AME–AME 0.12, AME– ALE 0.13, PME–PME 0.22, PME–PLE 0.27, ALE–PLE 0.08. MOA 0.56 long, front width 0.38, base width 0.52. Clypeus height 0.26. Chelicerae brown, with 4 promarginal and 3 retromarginal teeth. Leg measurements: I lost (5.44, -, -, -); II 13.90 (4.05, 4.62, 3.45, 1.78); III 11.79 (3.56, 3.85, 2.81, 1.57); IV 14.49 (4.17, 4.93, 3.69, 1.70).

Male palp ( Figs 22C–E , 23C–E ) with a small retrolateral tibial apophysis located on the anterior part of tibia; dorsal tibial apophysis bifurcated with an obvious pit between interior branch of dorsal tibial apophysis and exterior branch of dorsal tibial apophysis. Interior branch of dorsal tibial apophysis spout-like. Exterior branch of dorsal tibial apophysis strong, with an obvious pit. Anterior part of embolus relatively thin and acute with an inflated base. Median apophysis slender with anterior part slightly incurved. Tegular apophysis with a D-shaped process.

Female. Total length 7.28–9.43. Paratype ( Fig. 23B ) total length 10.65. Carapace 4.48 long, 3.13 wide; opisthosoma 6.40 long, 5.01 wide. Eye size and interdistances: AME 0.12, ALE 0.17, PME 0.15, PLE 0.19; AME – AME 0.13, AME – ALE 0.18, PME – PME 0.23, PME – PLE 0.32, ALE – PLE 0.10. MOA 0.53 long, front width 0.37, base width 0.51. Clypeus height 0.19. Leg measurements: I 10.37 (2.92, 3.52, 2.45, 1.48); II 8.19 (2.17, 3.04, 1.79, 1.19); III 6.99 (2.00, 2.44, 1.51, 1.04); IV 9.68 (2.80, 3.45, 2.18, 1.25) .

Epigyne ( Figs 22A, B , 23F, G ) median lobe saddle-shaped and anterior margin of median lobe V-shaped. Spermathecae reniform. Fertilization ducts slender and extending posteriorly.

Distribution. Known only from the type locality, Dali, Yunnan ( Fig. 24 ).

Figures

FIGURE 22. Taira yangi sp. nov. Holotype male (C–E), paratype female (A–B). A. Epigyne, ventral view; B. Same, dorsal view. C. Left male palp, prolateral view; D. Same, ventral view; E. Same, retrolateral view; Abbreviations: eDTA, exterior branch of dorsal tibial apophysis; Em, embolus; Co, conductor; ET, epigynal teeth; FD, fertilization duct; iDTA, interior branch of dorsal tibial apophysis; MA, median apophysis; ML, median lobe; Sp, spermathecae; TA, tegular apophysis.

FIGURE 23. Taira yangi sp. nov. Holotype male (A, C–E), paratype female (B, F–G). A. Male habitus, dorsal view; B. Female habitus, dorsal view; C. Left male palp, prolateral view; D. Same, ventral view; E. Same, retrolateral view; F. Epigyne, ventral view; G. Same, dorsal view.

FIGURE 24. Distribution records of the Taira flavidorsalis-group. Red dots represent new species, green dots represent previously described species. 1 T. borneoensis sp. nov. 2 T. cangshan 3 T. concava 4 T. decorata 5 T. flavidorsalis 6 T. gyaisiensis sp. nov. 7 T. latilabiata 8 T. liboensis 9 T. nyagqukaensis sp. nov. 10 T. obtusa 11 T. sulciformis 12 T. wanzhouensis sp. nov. 13 T. xuanenensis sp. nov. 14 T. yangi sp. nov.