Taibaishanus nankangensis, Irfan & Zhang & Peng, 2022

Irfan, Muhammad, Zhang, Zhi-Sheng & Peng, Xian-Jin, 2022, Survey of Linyphiidae (Arachnida: Araneae) spiders from Yunnan, China, Megataxa 8 (1), pp. 1-292 : 267-268

Taibaishanus nankangensis sp. nov. (DZĖẊƠƜƦ) Figures 302–304

Types. Holotype ♂, CHINA, Yunnan, Lonhyang County, Nankang , 24.81667ºN, 98.78333ºE, 2100m, 4–7 November 1998, Charles Griswold, D. H. Kavanaugh and Chun-lin Long leg. (98–NK).

Etymology. This epithet derives from the type locality.

Diagnosis. The new species can be distinguished from the Taibaishanus elegans Tanasevitch, 2006 by the male cephalic region with tomb-shaped cephalic lobe in T. nankangensis sp. nov. ( Fig. 303A ), whereas male cephalic lobe absent in T. elegans ( Tanasevitch, 2006, fig. 68). Dorsal tibial apophysis tongue-shaped and the retrolateral tibial apophysis tip without depression in T. nankangensis sp. nov. ( Fig. 302B–D ), whereas dorsal tibial apophysis somewhat triangular and the retrolateral tibial apophysis tip with depression in T. elegans ( Tanasevitch, 2006, figs 69, 71). Embolus tip fine in T. nankangensis sp. nov. ( Fig. 302A, D ), whereas broad with a small round outgrowth in T. elegans ( Tanasevitch, 2006, figs 70, 73). Radix slightly curved, longer than wide in T. nankangensis sp. nov. ( Fig. 302A–D ), whereas U-shaped in T. elegans ( Tanasevitch, 2006, figs 70, 73).

Description. Male (holotype, Fig. 303A–C ): Total length: 2.29. Carapace: 1.07 long, 0.84 wide, yellow; cephalic lobe anteriorly located, tomb-shaped 0.38 high, cephalic pits present at the base of the lobe; fovea, cervical and radial grooves distinct. Clypeus 0.24 high. Sternum longer than wide, cordiform. Labium wider than long. Maxillae long, distal end broad with scopulae. Chelicerae with four promarginal and five retromarginal teeth. Eye region narrow, AER recurved, PER straight, slightly wider than AER. Eye sizes and interdistances: AME 0.04, ALE 0.08, PME 0.07, PLE 0.08, AME–AME 0.03, PME–PME 0.07, AME–ALE, 0.02, PME–PLE 0.04, AME–PME 0.06, ALE–ALE 0.31, PLE–PLE 0.34, ALE–PLE contiguous. Length of legs: I 3.39 (0.98, 1.12, 0.74, 0.55), II 3.04 (0.86, 1.01, 0.68, 0.49), III 2.61 (0.76, 0.84, 0.62, 0.39), IV 3.36 (0.94, 1.10, 0.82, 0.50). Leg formula I-IV-II-III. Tm I 0.41 and Tm IV 0.32. Tibial spine formula: 2-2-1-1. Abdomen 1.22 long, 0.74 wide, oval, gray, with transverse black bands extending posteriorly; ventral side grayish black.

Palp ( Fig. 302A–D ). Patella shorter than tibia, ventrally slightly curved; tibia with two apophyses; dorsal tibial apophysis tongue-shaped with blunt end and the retrolateral tibial apophysis with long spines, distally curved with notched tip. Paracymbium U-shaped, distal arm tip hook-shaped.Protegulum membranous, extending forward. Radix slightly curved, longer than wide. The embolic division apophysis sclerotized, long, S-shaped apically. Embolus sinuous, tip fine and thin, forming a circle apically.

Female. Unknown.

Distribution. Known only from the type locality ( Fig. 304 ).

Genus Tapinopa Westring, 1851 (ḂƦø)

Figures

FIGURE 302. Taibaishanus nankangensis sp. nov., male palp of holotype. A prolateral view B retrolateral view C dorsal view D ventral view.

FIGURE 303. Taibaishanus nankangensis sp. nov. male holotype. A Habitus, dorsal view B Habitus, lateral view C Habitus, ventral view.

FIGURE 304. Distribution of Taibaishanus nankankgensis sp. nov.