Anapistula panensis Lin, Tao & S. Li, 2013

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

Anapistula panensis Lin, Tao & S. Li, 2013

Figs 3C, F, I, L , 6A-E , 9A-D

Anapistula panensis Lin, Tao & Li, 2013: 53, figs 1-5 (♂♀).

Type material.

Holotype ♂ and paratypes 1♂ 50♀ (IZCAS) from China: Guizhou Province, Liupanshui City, Pan County, Zhudong Township, Shiliping Village, Shenxian Cave (25.62367°N, 104.75653°E, 1687 m), 15.IV.2007, J. Liu & Y. Lin leg. Examined.

Other material examined.

51♀ 18 juvs (NHMSU-HA020) from China: same data as type locality, 26.IV.2010, Y. Lin & Q. Zhao leg. ; 1♂ 67♀ 20 juvs (NHMSU-QX003) same data as type locality, 24.VIII.2020, Y. Lin et al. leg .; 1♀ 1 juv (NHMSU-HA020) used for sequencing, GenBank accession numbers given in Table 2 , same data as for preceding .

Diagnosis.

The male of A. panensis is similar to that of A. choojaiae in the shape of the palp and in having C1 and C2 roughly equal in length, but it differs by a narrower C1 and a wider C2, a longer embolus, and having three setae on the paracymbium (vs. two; cf. Figs 6A, B , 9A, B ; Lin et al. 2013: figs 1, 2 with Rivera-Quiroz et al. 2021: figs 7c, 9a, b). The female differs from most Anapistula species by the Y-shaped epigynal median duct; it shares this character with A. orbisterna , A. secreta , A. bifurcate , A. tonga , A. choojaiae , A. equatoriana , A. zhengi , A. sanjiao sp. nov. and A. walayaku sp. nov. Anapistula panensis differs from all of these by the width and length of the MD, the length of the lateral branches, and the shape and relative size of the atrium (Figs 6C-E , 9C, D and Lin et al. 2013: figs 3, 4 vs. Forster and Platnick 1977: fig. 19; Harvey 1998: figs 9, 19; Rivera-Quiroz et al. 2021: figs 8d, 9c; Dupérré and Tapia 2017: fig. 33; Lin et al. 2013: figs 8, 9).

Redescription.

Male: habitus as in Fig. 3C, F . Body yellow. Legs pale yellow. Carapace nearly round, cephalic area moderately elevated. Four vestigial eyes in diads. Chelicerae distinctly sclerotized and fused basally, concave at inner margins, with two promarginal teeth. Endites as long as wide. Labium rectangular, length ca equal to ⅓ of width, fused to sternum. Sternum flat, with sparse setae, truncated posteriorly. Femur I and II swollen retrolatero-basally, tiny serrations and granulations on surface. Patellae I-IV each with a distal-dorsal seta. Abdomen ovoid dorsally, higher than long, covered with sparse, grey, long setae, posterior expanded beyond spinnerets. Colulus absent. Somatic measurement: body length 0.56, carapace 0.28 long, 0.28 wide, 0.24 high; sternum 0.20 long, 0.24 wide; abdomen 0.32 long, 0.28 wide, 0.36 high; length of legs: I 1.18 (0.34, 0.14, 0.26, 0.14, 0.30), II 0.96 (0.28, 0.12, 0.18, 0.12, 0.26), III 0.80 (0.20, 0.10, 0.16, 0.10, 0.24), IV 0.98 (0.30, 0.12, 0.18, 0.16, 0.22); leg formula I-IV-II-III.

Palp: small and weakly sclerotized. Femur slightly swollen distally, with a long seta at retrolateral base. Patella short, semilunar shaped. Tibia contracted proximally, broad distally. Cymbium transparent, with 7 retrolateral short and 2 dorsal long setae. Conductor sheet shaped, with two projections (C1 and C2), C1 sharp, C2 lamellar, nearly invisible. Embolus short, needle shaped, posterior to conductor. Sd coiled ca 2 times inside bulb (Figs 6A, B , 9A, B ).

Female: habitus see Fig. 3I, L . Carapace darker yellow than abdomen. Palps absent, others as in male. Somatic measurements: body length 0.68, carapace 0.28 long, 0.28 wide, 0.24 high; sternum 0.20 long, 0.18 wide; abdomen 0.50 long, 0.52 wide, 0.52 high; length of legs: I 1.18 (0.36, 0.14, 0.24, 0.20, 0.24), II 1.08 (0.30, 0.14, 0.24, 0.18, 0.22), III 0.82 (0.18, 0.12, 0.16, 0.16, 0.20), IV 1.12 (0.30, 0.14, 0.26, 0.18, 0.24); leg formula I-IV-II-III.

Epigyne: flat, without scape. Atrium ovoid, narrower than space between spermathecae. Spermathecae spherical, separated by ca 1.3 × their diameter, obviously sclerotized (Figs 3L , 6C , 9C ). Lateral branches diverging from MD, forming Y-shape (Figs 6D, E , 9C, D ), as wide as ⅓ of MD, as long as MD (Fig. 6E ; Lin et al. 2013: figs 3, 4). Fertilization ducts very short, translucent, nearly invisible, Llb appear as tiny bumps distally on lateral branches (Figs 6D, E , 9C, D ).

Natural history.

This species spins a small, flat circular web in the crevices of stalagmites or stalactites in caves.

Distribution.

China (Guizhou) (Fig. 10 ).

Figures

Figure 3. Anapistula sanjiao sp. nov. (A, D, G, J), Anapistula walayaku sp. nov. (B, E, H, K), and Anapistula panensis (C, F, I, L) A, C male habitus, dorsal D, F male habitus, ventral B male prosoma, dorsal E male prosoma, ventral G-I female habitus, dorsal J-L female habitus, ventral. Scale bars: 0.20 (A-L).

Figure 6. Anapistula panensis A male palp, prolateral B male palp, retrolateral C epigyne, ventral D vulva, ventral E vulva, dorsal. Abbreviations: A = epigynal atrium; Co = conductor; C 1 = anterior projection of conductor; C 2 = posterior projection of conductor; Cy = cymbium; E = embolus; Fd = fertilization duct; Lb = lateral branch of the MD; Llb = distal lobe of lateral branch; MD = median duct of vulva; Pa = palpal patella; S = spermatheca; Sd = sperm duct; Te = palpal tibia. Scale bars: 0.10 (A-E).

Figure 9. Anapistula panensis A male palp, prolateral B male palp, retrolateral C vulva, ventral D vulva, dorsal. Abbreviations: A = epigynal atrium; Co = conductor; C 1 = anterior projection of conductor; C 2 = posterior projection of conductor; Cy = cymbium; E = embolus; Fd = fertilization duct; Lb = lateral branch of the MD; Llb = distal lobe of lateral branch; MD = median duct of vulva; Pa = palpal patella; S = spermatheca; Sd = sperm duct; Te = palpal tibia. Scale bars: 0.10 (A-D).

Figure 10. Distribution records of three Chinese cave-dwelling Anapistula species.