Amaurobius danba Lin & Li, 2024

Lu, Ying, Lin, Yejie & Li, Shuqiang, 2024, Two new species of Amaurobius C. L. Koch, 1837 (Araneae, Amaurobiidae) from Sichuan Province, China, Zootaxa 5397 (1), pp. 116-126 : 117-118

publication ID	https://doi.org/ 10.11646/zootaxa.5397.1.6
publication LSID	lsid:zoobank.org:pub:BA26DCC9-AC6D-426C-BD75-877BEA3FF74E
DOI	https://doi.org/10.5281/zenodo.10468464
persistent identifier	https://treatment.plazi.org/id/03CA879D-FFF6-E93C-FF05-38DCFCCEF8DD
treatment provided by	Plazi
scientific name	Amaurobius danba Lin & Li
status	sp. nov.

Treatment

Amaurobius danba Lin & Li , sp. nov.

Figs 1 View FIGURE 1 , 2 View FIGURE 2 , 3 View FIGURE 3 , 7A View FIGURE 7 , 8A–D View FIGURE 8 , 9 View FIGURE 9

Type material. Holotype: ♁ (IZCAS-Ar44738), China, Sichuan, Ganzi Tibetan Autonomous Prefecture, Geshizha Town , Danba Co., Daxue Vill., (30.88°N, 101.88°E), 30 VII 2004, Xiang Xu leg. GoogleMaps Paratypes: 2♀ (IZCAS-Ar44739, Ar44740), same data as holotype GoogleMaps .

Etymology. The specific name refers to the type locality and is a noun in apposition.

Diagnosis. Amaurobius danba sp. nov. resembles A. guangwushanensis Wang, Irfan, Zhou & Zhang, 2023 (cf. Figs 1 View FIGURE 1 , 2 View FIGURE 2 , 3 View FIGURE 3 , 7A View FIGURE 7 , 8A–D View FIGURE 8 and Wang et al. 2023: 308, figs 1A–E, 2A–G) in that the males have similar conductor and embolus ( Figs 1A View FIGURE 1 , 2A View FIGURE 2 ), and the females have similar spermathecae ( Fig. 3B View FIGURE 3 ). However, this new species can be distinguished by the male median apophysis spatula shaped, distinctly excavated on prolateral side ( Fig. 1A, B View FIGURE 1 ; vs. median apophysis doorknob-like), and the retrolateral tibial apophysis triangular, apically curved in retrolateral view ( Figs 1B View FIGURE 1 , 2A, B View FIGURE 2 ; vs. retrolateral tibial apophysis thumb-shaped), and the dorsal tibial apophysis wider ( Figs 1A, B View FIGURE 1 , 2B View FIGURE 2 ; vs. dorsal tibial apophysis relatively narrow); females can be separated by the posterior margin of median lobe slight procurved ( Fig. 3A View FIGURE 3 ; vs. median lobe narrow, posterior margin slightly recurved), and the lateral lobes triangular, pointed ( Fig. 3A View FIGURE 3 ; vs. lateral lobes with round margin), and the copulatory ducts inconspicuous ( Fig. 3B View FIGURE 3 ; vs. copulatory ducts transverse, located between spermathecae).

Description. Male (holotype; Fig. 8A, B View FIGURE 8 ): Total length 9.8, carapace 5.0 long, 3.6 wide; abdomen 4.8 long, 3.1 wide. Eye sizes and interdistances: AME 0.13, ALE 0.20, PME 0.14, PLE 0.18; AME–AME 0.11, AME–ALE 0.30, PME–PME 0.32, PME–PLE 0.46, AME–PME 0.23, ALE–PLE 0.12. Leg measurements: I: 12.4 (3.5, 4.3, 3.0, 1.6); II: 11.5 (3.3, 4.1, 2.7, 1.4); III: 9.9 (2.8, 3.6, 2.4, 1.1); IV: 12.7 (3.6, 4.7, 3.1, 1.3).

Colouration (in alcohol). Carapace brown without flecks, sternum yellowish, chelicerae dark brown, maxillae and labium brown, dorsum of abdomen brownish with yellowish stripes in the anteromedian part, four pairs of chevrons in the posterior part, and venter brownish with white lines in both lateral sides, legs yellowish brown without ring flecks, spinnerets yellowish.

Chelicera. With 3 promarginal and 4 retromarginal teeth.

Palp ( Figs 1A, B View FIGURE 1 , 2A, B View FIGURE 2 ). Two apophyses present in the lateral to dorsal portion of tibia: retrolateral tibial apophysis triangular, apically curved, dorsal tibial apophysis with two processes: dorsal process wide, margin undulated, mesal process triangle shaped. Bulb almost oval. Conductor membranous, partly fused with tegulum; median apophysis spatula shaped, distinctly excavated on prolateral side; embolus short and conglutinates with the tegulum.

Female (paratype; Fig. 8C, D View FIGURE 8 ): Total length 11.6, carapace 5.0 long, 3.8 wide; abdomen 6.6 long, 4.4 wide. Eye sizes and interdistances: AME 0.13, ALE 0.18, PME 0.15, PLE 0.15; AME–AME 0.16, AME–ALE 0.48, PME–PME 0.42, PME–PLE 0.74, AME–PME 0.21, ALE–PLE 0.23. Leg measurements: I: 10.9 (3.1, 4.1, 2.2, 1.5); II: 10.2 (2.9, 3.9, 2.1, 1.3); III: 11.2 (3.2, 4.4, 2.4, 1.2); IV: 8.4 (2.4, 3.2, 1.7, 1.1).

Chelicerae. With 4 promarginal and retromarginal teeth.

Colouration (in alcohol). Colour and somatic morphology as in male, except as noted. Carapace reddish-brown to black, sternum yellowish to brown, chelicerae black, maxillae and labium dark brown, dorsum of abdomen dark brown to white, legs brown, spinnerets brown.

Epigyne and internal genitalia ( Fig. 3A, B View FIGURE 3 ). Lateral lobes triangular, pointed and distant from each other; median lobe rectangular, slightly excavated medially on both anterior and posterior margins, wider than long. Spermathecae spherical and distant from each other, copulatory ducts inconspicuous, fertilization ducts elongate and distinct.

Distribution. China (Sichuan, type locality; Fig. 9 View FIGURE 9 ).