Pholcus yangpyeong sp. nov.

Figs 7, 8E

Material examined.

Holotype: South Korea • ♂; Gyeonggi-do, Yangpyeong-gun, Danwol-myeon, Danwol-ro; 37°35.2'N, 127°40.7'E; alt. 275 m; 14 July 2021; C.M. Jang & S.T. Kim leg.; NIBR #WGJTIV0000000569 . Paratypes: South Korea • 6♂♂ and 5♀♀ same data as holotype; NIBR #NUHGIV00000000041-51 .

Diagnosis.

Pholcus yangpyeong sp. nov. can be easily distinguished from the other species within the P. phungiformes species group by the combination of the following characters: Male - uncus rectangular and protruding triangularly on one side; procursus with prolateral apophysis with two pointed and one serrated tips (numbered 1 in Fig. 7H, I), strongly curved ventral membranous process (numbered 2 in Fig. 7H, I), claw-shaped and slightly curved ventrodistal apophysis (numbered 3 in Fig. 7H-J). Female - anterior arch slightly recurved, pore plates rectangular and far apart from each other (Fig. 7G).

Description.

Male (holotype). Habitus as in Fig. 7A. Total length 5.27. Carapace: 1.52 long/1.68 wide. Eyes: AER 0.79, PER 0.86, ALE 0.21, AME 0.16, PLE 0.21, PME 0.18, ALE-PLE contiguous, ALE-AME 0.05, AME-AME 0.08, AME-PME 0.06, PME-PLE 0.04, PME-PME 0.32. Chelicera: 1.05 long/0.33 wide. Endite: 0.50 long/0.34 wide. Labium: 0.26 long/0.34 wide. Sternum: 0.89 long/1.07 wide. Legs: I 46.60 (11.90, 0.74, 11.87, 19.79, 2.30), II 31.16 (8.56, 0.74, 7.80, 12.51, 1.55), III 21.66 (6.31, 0.62, 5.24, 8.31, 1.18), IV 28.35 (8.35, 0.64, 7.13, 10.88, 1.35), tibia I L/d 62. Palp: 3.31 (0.56, 0.40, 1.04, -, 1.31). Abdomen: 3.75 long/1.52 wide.

Carapace pale yellowish brown, cephalic region with pale blackish brown median and marginal bands, thoracic region with pale blackish brown radial and marginal bands (Fig. 7A). Chelicera with three apophyses; blunt proximo-lateral apophysis protruding diagonally upward out of chelicera, small and pointed frontal apophysis slightly protruding downward, and thick and pointed distal apophysis slightly protruding diagonally downward (Fig. 7C, D). Legs yellowish brown, retrolateral trichobothrium on tibia I at 6% proximally, tarsus I with 30 pseudosegments, femora, tibiae, and metatarsi with one or two pale to dark blackish brown proximal and distal annuli, leg formula I-II-IV-III.

Abdomen elliptical, turbid gray with a long cardiac pattern and many black irregular spots (Fig. 7A). Palp (Fig. 7H-K): trochanter with blunt and finger-like retrolatero-ventral apophysis, shorter than femur; palpal tibia with a finger-shaped prolatero-ventral modification hidden by uncus; bulb pale yellowish brown, pocket-shaped; uncus dark blackish brown and rectangular with rounded edge having fine scales, protruding triangularly on one side, edge finely serrated, pseudo-appendix hook-shaped (Fig. 7H, K); embolus thick and weakly sclerotized with some semitransparent fringed distal processes and oblique broad tip, slightly curved (Fig. 7H, K); procursus large and long, brown with blackish brown margin, ventral knee roundly swollen, two apophyses and one process present, prolateral apophysis with two pointed and one serrated tips (numbered 1 in Fig. 7H, I), ventral membranous process white, membranous, and strongly curved (numbered 2 in Fig. 7H, I), ventrodistal apophysis claw-shaped and slightly curved (numbered 3 in Fig. 7H-J), one thin and recumbent dorsal spine present (Fig. 8E).

Female (paratype). General appearance similar to male, habitus as in Fig. 7B. Total length 4.54. Carapace: 1.53 long/1.66 wide. Eyes: AER 0.69, PER 0.76, ALE 0.19, AME 0.13, PLE 0.18, PME 0.17, ALE-PLE contiguous, ALE-AME 0.05, AME-AME 0.06, AME-PME 0.07, PME-PLE 0.05, PME-PME 0.24. Chelicera: 0.93 long/0.30 wide. Endite: 0.49 long/0.27 wide. Labium: 0.25 long/0.32 wide. Sternum: 0.82 long/1.01 wide. Legs: I 32.38 (8.16, 0.56, 8.18, 13.15, 2.33), II 21.71 (5.96, 0.58, 5.47, 8.34, 1.36), III 15.90 (4.60, 0.57, 3.74, 5.90, 1.09), IV 21.73 (6.41, 0.54, 5.46, 7.97, 1.35), tibia I L/d 49. Palp: 1.31 (0.42, 0.18, 0.24, -, 0.47). Abdomen: 3.01 long/1.36 wide. Epigynum: 1.10 wide.

Legs yellowish brown, femora, tibiae, and metatarsi with one or two pale blackish brown proximal and distal annuli, leg formula I-IV≒II-III. Epigynum (Fig. 7E, F): sclerotized and protruding anteromedially, anterior epigynal plate strongly protruding, anterior arch with median portion slightly recurved, anterior epigynal plate and posterior epigynal plate far apart, both sides of median portion sclerotized; small and short knob with a blunt tip. Internal genitalia (Fig. 7G): pore plates rectangular and far apart from each other.

Variation.

Tibia I in six paratype males (NIBR #NUHGIV00000000041-46): 11.38 ± 0.87 (11.61, 11.13, 12.47, 11.63, missing, 10.08). Tibia I in other four paratype female (NIBR #NUHGIV00000000048-51): 8.39 ± 0.71 (8.42, 9.13, 7.42, 8.59).

Habitat.

Rock walls and under rocks in mountainous mixed forest (Fig. 1F).

Distribution.

South Korea (Yangpyeong-gun, Gyeonggi-do) (Fig. 1A).

Etymology.

The specific name is a noun in apposition referred to the type locality, Yangpyeong-gun.