Pholcus yaan Li, Li & Yao sp. nov.

Figs 12, 13, 14 F

Type material.

Holotype: China • ♂; Sichuan, Yaan, Lushan County, Longdongpo; 30.089279 ° N, 102.931493 ° E; alt. 944 m; 24 May 2024; X. Zhang, Y. Wang & Q. Meng leg.; SYNU -Ar 00489 . Paratypes: China • 3 ♀; same data as for the holotype; SYNU -Ar 00490 –92 .

Etymology.

The specific name refers to the type locality; noun in apposition.

Diagnosis.

The new species resembles P. mengding sp. nov. (Figs 8 A – D, 9 A – H, 14 D) by having similar uncus (Figs 13 C, 14 F), male chelicerae (Fig. 13 D) and epigyne (Fig. 13 A), but can be distinguished by prolatero-subdistal membranous edge of procursus laterally pointed (arrow 1 in Fig. 12 D vs laterally blunt), by appendix without branch (a in Figs 13 C, 14 F vs with curved subdistal branch), and by vulval pore plates nearly round (pp in Fig. 13 B vs nearly elliptic, 2 × longer than wide).

Description.

Male (holotype): Measurements: Total length 4.64 (4.86 with clypeus), carapace 1.34 long, 1.48 wide, opisthosoma 3.30 long, 1.52 wide. Leg I: 43.27 (10.71, 0.68, 10.77, 18.65, 2.46), leg II: 28.33 (7.69, 0.67, 7.05, 11.54, 1.38), leg III: 19.25 (5.64, 0.56, 4.68, 7.37, 1.00), leg IV: 25.63 (7.37, 0.63, 6.35, 9.94, 1.34); tibia I L / d: 80. Eye interdistances and diameters: PME – PME 0.31, PME 0.18, PME – ALE 0.06, AME – AME 0.07, AME 0.09. Sternum width / length: 1.00 / 0.90.

Color: Carapace yellowish, with brown radiating marks and marginal brown bands; ocular area and clypeus brown; sternum yellowish, with brown marks. Legs yellowish, but dark brown on patellae and whitish on distal parts of femora and tibiae, with darker rings on subdistal parts of femora and proximal and subdistal parts of tibiae. Opisthosoma yellowish, with dorsal and lateral brown spots.

Body: Habitus as in Fig. 13 E, F; ocular area elevated, each eye triad on top of laterally directed eye-stalk.

Chelicerae: As in Fig. 13 D, with pair of proximo-lateral apophyses, pair of distal apophyses with two teeth each, and pair of frontal apophyses.

Palp: As in Fig. 12 A, B; trochanter with long (2 × longer than wide), retrolaterally strongly bulged ventral apophysis; femur with retrolatero-proximal protrusion (arrow in Fig. 12 B) and distinct ventral protrusion; tibia with prolatero-ventral protrusion (arrow in Fig. 12 A); procursus simple proximally but complex distally, with raised, prolatero-subdistal membranous edge bearing distal membranous process (arrow 1 in Fig. 12 C), distal membranous process bearing sclerotized part (arrow 2 in Fig. 12 C), sclerotized dorso-subdistal apophysis (arrow 3 in Fig. 12 C), and two slender dorsal spines (arrows 2, 3 in Fig. 12 D); uncus with scaly edge, proximal apophysis, and distinct latero-median protrusion (arrows 1, 2 in Figs 13 C, 14 F); appendix slender and curved (Figs 13 C, 14 F); embolus weakly sclerotized, with some transparent distal projections (Figs 13 C, 14 F).

Legs: Retrolateral trichobothrium on tibia I at 6 % proximally; legs with short vertical setae on tibiae, metatarsi, and tarsi; tarsus I with 37 distinct pseudosegments.

Female (paratype, SYNU -Ar 00490): Similar to male, habitus as in Fig. 13 G, H. Total length 5.10 (5.35 with clypeus), carapace 1.22 long, 1.45 wide, opisthosoma 3.88 long, 2.28 wide; tibia I: 8.40; tibia I L / d: 60. Eye interdistances and diameters: PME – PME 0.19, PME 0.17, PME – ALE 0.04, AME – AME 0.06, AME 0.08. Sternum width / length: 0.95 / 0.89. Ocular area without eye-stalks. Epigyne nearly triangular, laterally strongly sclerotized, with knob (Fig. 13 A). Vulva with curved, posteriorly sclerotized anterior arch and pair of nearly round pore plates (Fig. 13 B).

Variation.

Tibia I in the other two paratype females (SYNU -Ar 00491 –92): 8.72, 8.91.

Habitat.

Underside of overhang on rocky cliffs in the mountain area.

Distribution.

China (Sichuan, type locality; Fig. 1).