Bifurcia labahe sp. nov. Figs 5, 6, 16 B, E Type material. Holotype ♂ (IZCAS - Ar 44929), Labahe Nature Reserve (30 ° 9.89 ' N, 102 ° 27.24 ' E), Tianquan County, Ya’an, Sichuan, China, 10 / 07 / 2004, Lihong Tu leg. Etymology. The specific name refers to the type locality; noun in apposition. Diagnosis. The species resembles B. kangding sp. nov. with similar pseudolamella (PL) and median membrane (MM) (Fig. 16 B, E), but can be easily distinguished by thumb of embolus (TH) 0.6 times radix (R) length (Figs 5 A, 16 B vs. 0.3, Figs 2 A, 16 A), by anterior part of radix (APR) round (Fig. 16 E vs. hooked, Fig. 16 D), by median terminal apophysis (MTA) with jagged edge (Fig. 16 B vs. branched, Fig. 16 A), and by posterior terminal apophysis (PTA) thick and 0.7 times pseudolamella (PL) length (Fig. 16 B vs. thin and 0.2, Fig. 16 A). Description. Male (holotype). Total length: 2.24, carapace 1.06 long, 0.96 wide, abdomen 1.18 long, 0.78 wide. Eye inter-distances and diameters: AME 0.05, AME-AME 0.02, ALE 0.09, AME-ALE 0.06, PME 0.06, PME-PME 0.07, PLE 0.09, and PME-PLE 0.05. Sternum 0.61 long, 0.45 wide. Clypeus 0.08 high. Chelicerae promargin with 2 teeth, retromargin with 1 tooth. Length of legs: I 7.00 (1.84, 0.34, 1.92, 1.80, 1.10), II 5.80 (1.64, 0.28, 1.62, 1.44, 0.82), III 4.34 (1.27, 0.27, 1.08, 1.09, 0.63), IV 5.70 (1.68, 0.28, 1.54, 1.48, 0.72). Leg formula: I-II-IV-III. TmI 0.17, TmIV absent. Tibial spine formula: 2-2 - 2 - 2. Carapace brown. Sternum dark brown. Abdomen with greenish gray dorsal spots (Fig. 6). Palp (Fig. 5). Patella with long dorsal bristle. Tibia unmodified. Cymbium with hook-shaped proximal apophysis (PCA) pointing retrolaterally. Paracymbium (P) bifurcate with three branches: mushroom-shaped branch and two short branches proximally. Pit hook (PH) on stout distal part of suprategulum (SPT) extremely reduced to small outgrowth. Embolic division (Fig. 16 B, E): anterior part of radix (APR) round; sperm duct inside the radix (R) inconspicuous with Fickert’s gland (FG); pseudolamella (PL) smooth and pointed; lamellar extension (LE) absent. Anterior terminal apophysis (ATA) short; median terminal apophysis (MTA) board; posterior terminal apophysis (PTA) thick with dentate anterior margin. Embolus (E) with conical embolus proper (EP), large thumb (TH), and apex (AX). Median membrane (MM) round with numerous papillae, and basal part of median membrane chitinized (CPM). Female. Unknown. Distribution. China (Sichuan, type locality; Fig. 1).

Published as part of Yang, Lan, Li, Shuqiang & Yao, Zhiyuan, 2024, Five new species of the spider genus Bifurcia Saaristo, Tu & Li, 2006 (Araneae, Linyphiidae) from Sichuan, China, pp. 705-720 in Zoosystematics and Evolution 100 (2) on pages 705-720, DOI: 10.3897/zse.100.124160