Bathyphantes magnis, 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 : 46-51

Bathyphantes magnis sp. nov. (DDzƦ)

Figures 38–41

Types. Holotype ♂, CHINA, Yunnan, Fugong County, 18km, Lumadeng, Yama river bridge, 25.13561°N, 98.84166°E, alt. 1612m, 7 October 2007, Xian-jin Peng leg. (20071007) ; Paratypes: 14♂ 16♀, same data as holotype (20071007); 2 ♂ 4♀, Fugong County, Pihe Township , YueliangtianVillage, 26.56784°N, 98.90884°E, alt. 1520m, 20, 23, 24 August 2005, Guo Tang leg. (Tang – 05–08) ; 2♂ 1♀, Fugong County, Lumadeng Township , Yaping Village , Yaping yakou, 12 km, rock, bank, bamboo, 27.20658°N, 98.21782°E, alt. 3280– 3100m, 8 May 2004, Heng-mei Yan leg. (20040508) ; 3♂, Gongshan County, Qiqi Dongshaofang , 27.69521°N, 98.48514°E, alt. 3208m, 29 September 2007, Xian-jin Peng leg. (20070929) ; 1♂ 1♀, Yaping , 27.20490°N, 98.71444°E, alt. 3266m, 6 May 2004, Heng-mei Yan leg. (20040506) ; 2♂ 1♀, Fugong County, Lumadeng Township , Yakou of old Shibali, 27.06430° N, 98.75123°E, alt. 3270m, 13 August 2005, Guo Tang leg. ( Tang –05–06) .

Etymology. This epithet derives from the Latin adjective “ magnus ”, meaning “large” and referring to large and very prominent sperm duct in male palp.

Diagnosis. This new species can be differentiated from any other congeners by the distal arm of paracymbium tip oval with blunt end, embolic division of male palp with a unique large sperm duct and long C-shaped embolus ( Fig. 38A–E ). Scape absent and relatively long spermathecae in epigyne ( Fig. 39A–C ).

Description. Male (holotype, Fig. 40A, B ): Total length: 2.11 Carapace 0.99 long, 0.73 wide, the cephalic region slightly elevated, dark brown; fovea, cervical and radial grooves distinct. Clypeus 0.28 high. Sternum longer than wide, brown, sparsely covered with microsetae. Labium wider than long. Maxillae long, distal end broad with scopulae. Chelicerae with three promarginal and three retromarginal teeth. Eye region narrow, AER recurved, PER straight and slightly wider than AER. Eye sizes and interdistances: AME 0.06 ALE 0.08, PME 0.06, PLE 0.06, AME–AME 0.05, PME–PME 0.05, AME–ALE, 0.07, PME–PLE 0.08, ALE–ALE 0.38, PLE–PLE 0.41, ALE– PLE 0.01. Legs long, pale. Length of legs: I 4.11 (1.30, 0.99, 0.69), II 3.83 (1.04, 1.27, 0.88, 0.64), III 2.55 (0.73, 0.76, 0.63, 0.43), IV 3.20 (0.93, 0.96, 0.79, 0.52). Leg formula I-II-IV-III. Tm I 0.49 and Tm IV 0.31. Tibial spine formula: 2-2-2-2. Abdomen 1.12 long, 0.74 wide, oval, light brown, dorsally with median black strip in anterior 2/3 of abdomen, followed by three transverse black chevrons, base of spinnerets black, ventral side light brown.

Palp ( Figs 38A–E ): Tibia conic, with one retrolateral and one dorsal trichobothrium, with many short or long spine-like hairs on all surfaces. Paracymbium sclerotized, proximal end wider than distal part, distal arm curved with ear lobe-shaped tip, tegulum with a transparent protegulum bulge on ectal side; the distal suprategular apophysis hidden in unexpanded palp; median membrane sclerotized, distal end leaf-shaped, slightly covering the embolus; embolic plate highly sclerotized, with a large sperm duct, quite prominent in unexpanded palp; dorsal projection of embolic plate conical in shaped, overlapping the cymbium in prolateral view; anterior projection of embolic plate thick, sclerotized; embolus thick, highly sclerotized, curved, originates from prolateral side of palp.

Female (one of paratypes, 40C, D): Total length: 2.11.

Carapace 0.84 long, 0.69 wide, the cephalic region slightly elevated, dark brown; fovea, cervical and radial grooves distinct. Clypeus 0.18 high. Sternum longer than wide, brown, sparsely covered with microsetae. Labium wider than long. Maxillae long, distal end broad with scapulae. Chelicerae with four promarginal and three retromarginal teeth. Eye region narrow, AER recurved, PER straight and slightly wider than AER. Eye sizes and interdistances: AME 0.05 ALE 0.07, PME 0.07, PLE 0.06, AME–AME 0.04, PME–PME 0.04, AME–ALE, 0.05, PME–PLE 0.06, ALE–ALE 0.33, PLE–PLE 0.35, AME–PME 0.06, ALE–PLE 0.01. Legs long, pale. Length of legs: I 3.68 (1.04, 1.14, 0.84, 0.66), II 3.43 (0.96, 1.09, 0.79, 0.59), III 2.33 (0.72, 0.67, 0.54, 0.40), IV 3.12 (0.91, 0.94, 0.78, 0.49). Leg formula I-II-IV-III. Tm I 0.43 and Tm IV 0.34.

Tibial spine formula: 2-2-2-2. Abdomen 1.27 long, 0.94 wide, oval, light brown, dorsally with median black strip in anterior 2/3 of abdomen, followed by three transverse black chevrons, base of spinnerets black, ventral side light brown.

Epigyne ( Fig. 39A–C ): Ventral plate with a depressed area on each side, posterior margin wave-like; distal end of parmula round; copulatory ducts forming single coil before joining to the spermathecae; spermathecae long, present at the apex of the dorsal plate, pointing away from each other; fertilization ducts extending mesally.

Distribution. Known only from the type locality ( Fig. 41 ).

Genus Bolyphantes C. L. Koch, 1837 (dz‼Ʀø)

Figures

FIGURE 38. Bathyphantes magnis sp. nov., male palp of holotype. A, prolateral view, B ventral view, C retrolateral view, D Embolic division, ventral view, E Embolic division, dorsal view.

FIGURE 39. Bathyphantes magnis sp. nov., female (one of paratypes). A, B Epigyne, ventral view, C Vulva, dorsal view.

FIGURE 40. Bathyphantes magnis sp. nov., male (holotype, A, B) and female (one of paratypes, C, D). A, C Habitus, dorsal view B, D Habitus, ventral view.

FIGURE 41. Distribution of Bathyphantes species.