Anapistula walayaku S. Li & Lin, 2022

Wang, Shuqiao, Lu, Ying, Li, Ya, Li, Shuqiang & Lin, Yucheng, 2022, Systematic notes on three troglobitic Anapistula (Araneae, Symphytognathidae) spiders from China, with the descriptions of two new species, ZooKeys 1130, pp. 167-189 : 167

publication ID	https://dx.doi.org/10.3897/zookeys.1130.91467
publication LSID	lsid:zoobank.org:pub:991C7618-4FD0-4191-A411-9F6AB775D3AF
persistent identifier	https://treatment.plazi.org/id/2AC52BB0-C4EB-49BE-80B6-0324F4FD7BEC
taxon LSID	lsid:zoobank.org:act:2AC52BB0-C4EB-49BE-80B6-0324F4FD7BEC
treatment provided by	ZooKeys by Pensoft
scientific name	Anapistula walayaku S. Li & Lin
status	sp. nov.

Treatment

Anapistula walayaku S. Li & Lin sp. nov.

Figs 3B, E, H, K View Figure 3 , 5A-E View Figure 5 , 8A-D View Figure 8

Type material.

Holotype ♀ and paratypes 1♂ 6♀ (NHMSU-HA138), China: Yunnan Province, Nujiang Lisu Autonomous Prefecture, Lushui County, Daxingdi Township, Walayaku Cave (26.13198°N, 098.86149°E, 910 m), 10.VIII.2018, Y. Lin, Y. Li & Y. Shu leg.; 2♀ (NHMSU-HA106) from China: same data as for the holotype, 24.VI.2016, Y. Li leg. (NHMSU-HA106); 1♂, 1♀, 1 juv. (NHMSU-HA138), and 1♀ (NHMSU-HA106) used for sequencing, GenBank accession numbers given in Table 2 View Table 2 , same data as for preceding.

Etymology.

The new species is named after the type locality; noun.

Diagnosis.

The male of A. walayaku sp. nov. is similar to that of A. panensis Lin, Tao & Li, 2013 by the relatively small bulb and the ventrally extended cymbium, but it differs by the short, blunt C2 (cf. Figs 5B View Figure 5 , 8B View Figure 8 to Figs 6B View Figure 6 , 9B View Figure 9 ), the concave margin at the expanded part of the cymbium (cf. Figs 5A, B View Figure 5 , 8A, B View Figure 8 to Figs 6A, B View Figure 6 , 9A, B View Figure 9 ) and the straight embolic tip (vs. bent) (cf. Figs 5A View Figure 5 , 8A View Figure 8 to Figs 6A View Figure 6 , 9A View Figure 9 ). The female differs from most Anapistula species by the rounded atrium and the wide MD forming a Y-shape with the Lb (Figs 5C, E View Figure 5 , 8C View Figure 8 ). It seems similar to A. choojaiae but can be distinguished by the narrower base of the MD and having an earlobe-shaped Llb (cf. Figs 5E View Figure 5 , 8D View Figure 8 to Rivera-Quiroz et al. 2021: figs 8d, 9c).

Description.

Male: Carapace nearly round in male, ovoid in female, pale centrally and pale brown marginally, smooth surface and two central short setae (Fig. 3B View Figure 3 ). Lateral eyes vestigial, barely visible (Fig. 3B View Figure 3 ). Chelicerae with two promarginal teeth. Labium rectangular, fused to sternum (Fig. 3E View Figure 3 ). Sternum peltate, as long as wide, smooth, slightly convex, with sparse, short setae (Fig. 3E View Figure 3 ). Legs same colour as carapace (Figs 3B, E View Figure 3 ). Abdomen unknown. Spinnerets and anal tubercle pale. Somatic measurements: body length unknown. Carapace 0.32 long, 0.28 wide, 0.24 high; sternum 0.20 long, 0.20 wide; length of legs: I 1.00 (0.28, 0.12, 0.24, 0.14, 0.22), II 0.82 (0.20, 0.10, 0.18, 0.12, 0.22), III 0.76 (0.18, 0.10, 0.16, 0.10, 0.22), IV 0.80 (0.20, 0.08, 0.20, 0.14, 0.18); leg formula I-IV-II-III.

Palp: small and weakly sclerotized. Femur swollen distally, with a long seta at retrolateral base. Patella short, as long as ½ length of tibia. Tibia contracted proximally, lacking setae. Cymbium with 4 retrolateral short and 3 dorsal long setae. Paracymbial rim concave, with 3 short setae (Figs 5B View Figure 5 , 8B View Figure 8 ). Conductor sheet shaped, with two projections (C1 and C2), C1 sharp, C2 broad, blunt distally. Embolus long, needle shaped, located posterior to conductor, its end nearly reaches apex of C2. Sperm duct coiled ca 1.8 times inside bulb (Figs 5A, B View Figure 5 , 8A, B View Figure 8 ).

Female: prosoma pear-shaped, palps absent, others as in male (Fig. 3H, K View Figure 3 ). Abdomen sub-spherical, yellow, dorsally darker than ventrally, cuticle with sparse, short setae and weakly sclerotized spots (Fig. 3H, K View Figure 3 ). Somatic measurements: body length 0.64, carapace 0.32 long, 0.24 wide, 0.24 high; sternum 0.24 long, 0.24 wide; length of legs: I 0.96 (0.30, 0.12, 0.20, 0.18, 0.16), II 0.86 (0.28, 0.08, 0.18, 0.18, 0.14), III 0.70 (0.18, 0.08, 0.16, 0.14, 0.14), IV 0.82 (0.20, 0.06, 0.22, 0.14, 0.20); leg formula I-IV-II-III; abdomen 0.44 long, 0.40 wide, 0.44 high.

Epigyne: flat, covered with sparse, long setae, without scape. Atrium nearly round, as broad as width of inner MD. Spermathecae spherical, separated by ca 1.2 × their diameter, obviously sclerotized (Figs 3K View Figure 3 , 5C View Figure 5 , 8D View Figure 8 ). Lateral branch diverging from MD forming “Y” (Figs 5D, E View Figure 5 , 8C, D View Figure 8 ), as wide as ½ MD, same long as ⅔ of MD. Lateral branch runs along dorsal surface of spermathecae and ends in a short, transparent Llb. Fertilization ducts very short, nearly invisible (Figs 5D, E View Figure 5 , 8C, D View Figure 8 ).