Septsigilla zhongi Zhang & Zhang, 2025

Zhang, Haibin, Yu, Kun, Zuo, Anru & Zhang, Feng, 2025, Description of a new genus, Septsigilla gen. nov., with two new species from China (Araneae: Miturgidae: Systariinae), Zootaxa 5666 (1), pp. 125-135 : 130-134

Septsigilla zhongi Zhang & Zhang sp. nov. (öĸ七se)

Figs 4–6 , 7B , 8B , 9

Type material. Holotype ♂ (MHBUARA-2024-464-1), Xizang, Medog County, Drepung Town , 29.1805°N, 95.1422°E, 1681.4 m elev., 23 June 2024, leg. K. Yu, H. Zhang and Y. Zhang. Paratypes. 4♂ 2♀ (MHBUARA-2024-464-2‒7), same data as holotype .

Etymology. The specific name is in honor to Prof. Yang Zhong (1964‒2017), a botanist who made remarkable contributions to the conservation of biodiversity in Xizang.

Diagnosis. See S. tongbiguan Zhang & Zhang sp. nov.

Description. Male holotype ( Figs 4A‒B , 5A‒D ) total length 6.32; prosoma 3.38 long, 2.43 wide; opisthosoma 2.94 long, 1.58 wide. Eye sizes and interdistances: AME 0.11, ALE 0.13, PME 0.14, PLE 0.13; AME‒AME 0.10, AME‒ALE 0.04, ALE‒ALE 0.34, PME‒PME 0.11, PME‒PLE 0.11, PLE‒PLE 0.60, ALE‒PLE 0.07. OAW 0.75, CRW 1.30, OAW/CRW 0.58, MOA 0.35 long, anterior width 0.30, posterior width 0.37. CH 0.12, CH /AME 1.09. Chelicera promargin with three teeth, retromargin with two teeth. Labium 0.45 long, 0.35 wide. Sternum 1.64 long, 1.33 wide. Leg measurements: Ⅰ 9.60 (2.64, 1.26, 2.23, 2.04, 1.43), II 8.42 (2.31, 1.21, 1.86, 1.85, 1.19), III 7.63 (2.24, 1.03, 1.48, 1.97, 0.91), IV 10.61 (3.02, 1.37, 2.21, 2.95, 1.06); leg formula 4123. Leg spination: femora: Ⅰ d1-1-1, p0-0-2; II d1-1-1; III d1-1-1, p0-1-1, r1-1-1; IV d1-1-1, p0-1-1, r1-1-1. Tibiae: Ⅰ p0-1-1, v2-2-2; II p0-1-1, v2-2-2; III d1-0-0, p1-1-0, r1-1-0, v2-2-2; IV d1-0-0, p1-1-0, r1-1-0, v2-2-2. Metatarsi: Ⅰ p0-1-0, v2-2-0; II p0-1-0, v2-2-0; III d2-2-2, p1-1-1, r1-1-1, v2-2-2; IV d2-2-2, p1-1-1, r1-1-1, v2-2-2. Opisthosoma dorsally grey, with a pair of white vertical stripes at anterior center, five white stripes medially, and five white horizontal stripes laterally on each side.

Palp ( Figs 6A‒C , 8B ). Cymbial concavity shallow, about 1/3 times as long as cymbium. The posterior elongation of tegulum extending backward to median part of tibia. Embolus whiplike, originating at 8-o’clock-position, extending clockwise to 1-o’clock-position, then curving anteriad in ventral view and possessing three small embolic teeth on its distal 2/3 part. Conductor fan-shaped.

Female paratype ( Figs 4C‒D , 5E , MHBUARA-2024-464-6) total length 6.56; prosoma 3.60 long, 2.36 wide, cephalic region elevated. Opisthosoma 4.55 long, 2.66 wide. Eye sizes and interdistances: AME 0.12, ALE 0.15, PME 0.13, PLE 0.13; AME ‒ AME 0.10, AME ‒ ALE 0.04, ALE ‒ ALE 0.38, PME ‒ PME 0.14, PME ‒ PLE 0.14, PLE ‒ PLE 0.66, ALE ‒ PLE 0.06. OAW 0.82, CRW 1.52 , OAW/ CRW 0.54, MOA 0.37 long, anterior width 0.32, posterior width 0.39. CH 0.09, CH / AME 0.75. Labium 0.52 long, 0.45 wide. Sternum 1.69 long, 1.40 wide. Leg measurements: I 8.01 (2.30, 1.28, 1.86, 1.57, 1.00), II 7.48 (2.19, 1.15, 1.68, 1.50, 0.96), III 6.98 (1.99, 1.03, 1.47, 1.72, 0.77), IV 9.91 (2.86, 1.32, 2.20, 2.58, 0.95); leg formula 4123. Leg spination: femora: Ⅰ d1-1-1, p0-0-3; II d1- 1-1, p0-0-1; III d1-1-1, p0-1-1, r0-0-1; IV d1-1-1, p0-1-1, r0-0-1. Tibiae : Ⅰ v0-1-1; II v0-1-1; III d1-0-0, p1-1-0, r1- 1-0, v2-2-2; IV d1-0-0, p1-1-0, r1-1-0, v2-2-2. Metatarsi: Ⅰ v2-2-0; II v2-2-1; III d2-2-2, p1-1-1, r1-1-1, v2-2-2; IV d2-2-2, p1-1-1, r1-1-1, v2-2-2. Prosoma color as in male, opisthosoma dorsally brownish-yellow, without distinct patterns .

Epigyne ( Fig. 6D‒E ). Epigynal plate length about 1.5 times width. Atrium width about four times its length in ventral view. Primary spermatheca spherical, secondary spermatheca ovoid-shaped, smaller than primary spermatheca. Copulatory duct nearly straight. Bursa drop-shaped.

Distribution. China: Xizang ( Fig. 9 ).

Figures

FIGURE 4. Septsigilla zhongi Zhang & Zhang sp. nov., male holotype (A–B) and female paratype (C–D). Habitus, in dorsal (A, C) and ventral (B, D) view. Scale bars = 2 mm.

FIGURE 5. Septsigilla zhongi Zhang & Zhang sp. nov., Male holotype (A–D). A. Prosoma, frontal view; B. Eye region, dorsal view; C. Sternum. D. Male spinnerets, ventral view; E. Female spinnerets, ventral view. Abbreviations: si, sigillum; ss, slit sensilla.

FIGURE 6. Septsigilla zhongi Zhang & Zhang sp. nov., male holotype left palp (A–C) and female paratype epigyne (D–E), in prolateral (A), ventral (B, D), retrolateral (C) view and dorsal (E) view. Abbreviations: B, bursa; C, conductor; CD, copulatory duct; CO, copulatory opening; CT, connecting tube; DPA, dorsal patellar apophysis; E, embolus; ET, embolar tooth; FD, fertilization duct; PS, primary spermatheca; RTA, retrolateral tibial apophysis; SD, sperm duct; SS, secondary spermatheca; T, Tegulum; vBTA, ventral basal tibial apophysis.

FIGURE 7. Right leg Ⅰ of male paratype of Septsigilla tongbiguan Zhang & Zhang sp. nov. (A) and Septsigilla zhongi Zhang & Zhang sp. nov. (B) in retrolateral view. Abbreviations: RCW, retrocoxal window.

FIGURE 8. Conductor and embolus of Septsigilla tongbiguan Zhang & Zhang sp. nov. (A) and Septsigilla zhongi Zhang & Zhang sp. nov. (B). Abbreviations: ET, embolar tooth.

FIGURE 9. Distribution records of Septsigilla tongbiguan Zhang & Zhang sp. nov. and Septsigilla zhongi Zhang & Zhang sp. nov. in China.