Amaurobius guangwushanensis sp. nov. (光雾山暗蛛)

Wang, Lu-Yu, Irfan, Muhammad, Zhou, Huan & Zhang, Zhi-Sheng, 2023, Two new species of Amaurobius C. L. Koch, 1837 from China (Araneae, Amaurobiidae), ZooKeys 1169, pp. 307-315 : 307

publication ID	https://dx.doi.org/10.3897/zookeys.1169.102581
publication LSID	lsid:zoobank.org:pub:0D298638-F6F1-47C6-817E-D31B80C42C36
persistent identifier	https://treatment.plazi.org/id/60743BB5-C9FA-5101-ACD0-EC0961E28CAE
treatment provided by	ZooKeys by Pensoft
scientific name	Amaurobius guangwushanensis sp. nov. (光雾山暗蛛)
status

Treatment

Figs 1 View Figure 1 , 2 View Figure 2 , 5 View Figure 5

Type material.

Holotype ♂: China, Sichuan Province: Nanjiang County, Guangwu Mountain, Taoyuan, Sandaoguan, 32°41′15″N, 106°47'45″E, elev. 1377 m, 3.XI.2018, Z.S. Zhang, L.Y. Wang, T. Yuan, L. Yuan & P. Liu leg.; Paratypes (2♂♂12♀♀): 2♀♀, same data as holotype; 2♂♂3♀♀, Guangwu Mountain, Taoyuan, Lianghekou, 32°40′31″N, 106°46′08″E, elev. 1002 m, 3.XI.2018, Z.S. Zhang, L.Y. Wang, T. Yuan, L. Yuan & P. Liu leg.; 7♀♀, Guangwu Mountain, Taoyuan, 32°41′24″N, 106°47′39″E, elev. 1703 m, 16.V.2013, X.K. Jiang & D. Wang leg.

Etymology.

The epithet refers to the type locality (Mt. Guangwu is read as Guangwushan in Chinese); adjective.

Diagnosis.

Amaurobius guangwushanensis sp. nov. resembles A. wulongdongensis sp. nov. and A. spinatus in having a similar embolus in the male [Figs 1A View Figure 1 , 2C View Figure 2 ; see Zhang et al. (2018), figs 4C, 5E, 6A], but can be differentiated by the thumb-shaped retrolateral tibial apophysis in ventral view (Figs 1B View Figure 1 , 2D View Figure 2 ) [vs. somewhat rectangular in A. spinatus (see Zhang et al. 2018, figs 4D, 5F); semicircular in A. wulongdongensis sp. nov. (Figs 3B, C View Figure 3 , 4D, E View Figure 4 )]; interior branch of dorsal tibial apophysis somewhat triangular with a sharp pointed end in prolateral view in A. guangwushanensis sp. nov. (Figs 1D View Figure 1 , 2C View Figure 2 ) and A. wulongdongensis sp. nov. (Figs 3A View Figure 3 , 4C View Figure 4 ) [vs. about thumb-shaped with blunt tip in A. spinatus (see Zhang et al. 2018, figs 4C, 5E, 6C); tegular apophysis apex bifurcated in ventral view in A. guangwushanensis sp. nov. (Figs 1B View Figure 1 , 2D View Figure 2 ) [vs. broad with small depression at the center in A. spinatus (see Zhang et al. 2018, figs 4D, 5F; somewhat rectangular in A. wulongdongensis sp. nov. (Figs 3B View Figure 3 , 4D View Figure 4 )]; median apophysis doorknob-shaped, tip slightly curved in ventral view in A. guangwushanensis sp. nov. (Figs 1B View Figure 1 , 2D View Figure 2 ) [vs. hook-shaped in A. spinatus (see Zhang et al. 2018, figs 4D, 5F); doorknob-like, tip strongly curved in A. wulongdongensis sp. nov. (Figs 3B View Figure 3 , 4D View Figure 4 )]; conductor apex narrow, apical margin about half the length of the embolus in retrolateral view in A. guangwushanensis sp. nov. (Figs 1C View Figure 1 , 2E View Figure 2 ) [vs. broad, apical margin as long as embolus both in A. spinatus (see Zhang et al. 2018, figs 4E, 5G) and A. wulongdongensis sp. nov. (Figs 3C View Figure 3 , 4E View Figure 4 )]. The epigyne can be differentiated from the related species by the lateral teeth wider than long with round margin (Figs 1A View Figure 1 , 2F View Figure 2 ) (vs. longer than wide with pointed tip in A. spinatus Zhang, Wang & Zhang, 2018, figs 4A, 5C, 6B); median lobe somewhat sheet-like in A. guangwushanensis sp. nov. (Figs 1A View Figure 1 , 2F View Figure 2 ) [vs. oval in A. spinatus (see Zhang et al. 2018, figs 4A, 5C, 6B); round in A. wulongdongensis sp. nov. (Figs 3D View Figure 3 , 4F View Figure 4 )], lateral teeth c. 1/4 length of median lobe with round tip (Figs 1A View Figure 1 , 2F View Figure 2 ) [vs. about half the length of median lobe, horn-like with tapering tip in A. spinatus (see Zhang et al. 2018, figs 4A, 5C, 6B); broad, semicircular, almost two times larger than median lobe in A. wulongdongensis sp. nov. (Figs 3D View Figure 3 , 4F View Figure 4 )].

Description.

Male (holotype, Fig. 2A View Figure 2 ). Total length 3.12-3.52. Holotype (Fig. 2A View Figure 2 ) total length 3.52. Carapace 1.77 long, 1.26 wide; opisthosoma 1.59 long, 1.14 wide. Carapace yellowish. Cervical groove indistinct, radial furrows distinct. Eye measurements and interdistances: AME 0.06, ALE 0.11, PME 0.10, PLE 0.11; AME-AME 0.04, AME-ALE 0.05, PME-PME 0.06, PME-PLE 0.09, ALE-PLE 0.04. MOA 0.31 long, front width 0.14, back width 0.29. Clypeus height 0.11. Chelicerae brown, with 4 promarginal and 4 retromarginal teeth. Endites and labium yellowish brown, longer than wide. Sternum yellowish brown, with brown setae. Legs yellowish. Leg measurements: I 5.88 (1.62, 2.04, 1.35, 0.87); II 4.55 (1.30, 1.50, 1.05, 0.70); III 3.83 (1.11, 1.23, 0.93, 0.56); IV 5.00 (1.42, 1.66, 1.29, 0.63). Opisthosoma oval, dorsum yellowish, with six brown chevrons extending posteriorly, venter yellowish brown.

Palp (Figs 1A-C View Figure 1 , 2C-E View Figure 2 ). Femur almost as long as cymbium. Patella with strong dorso-apical short spine. Tibia with large thumb-shaped retrolateral tibial apophysis, originating near the base of tibia. Dorsal tibial apophysis large, exterior branch of dorsal tibial apophysis longer than wide, c. 1/3 length of tibia, with wavey tip in retrolateral view, interior branch of dorsal tibial apophysis short, somewhat triangular with pointed end in prolateral view. Cymbium longer than both tibia and patellae, with retrolateral angular projection. Bulb oval, slightly longer than wide. Tegulum widest in middle part, tegular apophysis with bifurcated apex. Conductor membranous, sheet-like. Median apophysis sclerotized, doorknob-like, about more than half-length of embolus, present at the center of bulb. Sperm duct visible in prolateral and retrolateral view. Embolus originating prolaterally, short, flat, with a round tip.

Female (Fig. 2B View Figure 2 ). Total length 4.29-4.36. One of paratypes (Fig. 2B View Figure 2 ) total length 3.84. Carapace 1.52 long, 1.05 wide; opisthosoma 2.40 long, 1.67 wide. Eye measurements and interdistances: AME 0.05, ALE 0.10, PME 0.09, PLE 0.10; AME-AME 0.05, AME-ALE 0.06, PME-PME 0.10, PME-PLE 0.12, ALE-PLE 0.04. MOA 0.30 long, front width 0.15, back width 0.28. Clypeus height 0.12. Legs yellowish brown. Leg measurements: I 4.14 (1.20, 1.46, 0.88, 0.60); II 3.90 (1.05, 1.14, 0.76, 0.50); III 3.09 (0.93, 1.07, 0.68, 0.41); IV 4.06 (1.21, 1.38, 0.97, 0.50). Opisthosoma color pattern as in male.

Epigyne (Figs 1D, E View Figure 1 , 2F, G View Figure 2 ). Median lobe wider than long; lateral teeth with round margin. Copulatory ducts transverse, located between spermathecae. Spermethecae globular, spaced by about half of radius. Fertilization ducts originating posteriorly, slightly curved, directed laterally.

Distribution.

Known only from the type locality, Sichuan, China (Fig. 5 View Figure 5 ).