Pholcus duryun sp. nov.

Figs 2, 8A

Material examined.

Holotype: South Korea • ♂; Jeollanam-do, Haenam-gun, Samsan-myeon, Daeheungsa-gil, Mt. Duryunsan; 34°29.6'N, 126°37.0'E, 88 m; 7 August 2019; S.T. Kim & S.Y. Lee leg.; NIBR #NUHGIV0000000001 . Paratypes: South Korea • 2♂♂ and 6♀♀ same data as for holotype; NIBR #NUHGIV0000000004-11 .

Diagnosis.

Pholcus duryun sp. nov. is similar to P. extumidus Paik, 1978 in the shape of the genital organ and body appearance but can be easily distinguished from the latter by the combination of the following characters: male - trochanter with short retrolatero-ventral apophysis; palpal tibia with quadrangular prolatero-ventral modification (Fig. 2H); uncus with rather smooth edge (Fig. 2H); procursus with triangular prolateral apophysis (numbered 1 in Fig. 2H-J) and slightly curved ventrodistal apophysis (numbered 2 in Fig. 2H-J) vs trochanter with long retrolatero-ventral apophysis; palpal tibia with semicircular prolatero-ventral modification; uncus with distinctive serrated edge; procursus with claw-shaped prolateral apophysis and strongly curved ventrodistal apophysis in P. extumidus (Paik 1978: 123, figs 47-49). Female - epigynum with straight anterior arch, median portion narrowly depressed postero-medially, and pore plates longitudinal (Fig. 2E) vs epigynum with recurved anterior arch, median portion broadly depressed postero-medially, and pore plates slanted in P. extumidus (Paik 1978: 123, figs 52-54).

Description.

Male (holotype). Habitus as in Fig. 2A. Total length 5.60. Carapace: 1.74 long/1.79 wide. Eyes: AER 0.62, PER 0.68, ALE 0.16, AME 0.12, PLE 0.17, PME 0.15, ALE-PLE contiguous, ALE-AME 0.05, AME-AME 0.04, AME-PME 0.06, PME-PLE 0.04, PME-PME 0.24. Chelicera: 0.95 long/0.27 wide. Endite: 0.51 long/0.34 wide. Labium: 0.32 long/0.39 wide. Sternum: 0.80 long/1.15 wide. Legs: I 44.27 (11.38, 0.64, 11.43, 18.43, 2.39), II 29.80 (8.18, 0.69, 7.55, 11.83, 1.55), III 20.68 (6.11, 0.59, 5.08, 7.75, 1.15), IV 27.15 (7.91, 0.65, 6.90, 10.29, 1.40), tibia I L/d 60. Palp: 4.05 (0.80, 0.38, 1.27, -, 1.60). Abdomen: 3.65 long/1.92 wide.

Carapace pale yellowish brown, cephalic region with a pale blackish brown median band, thoracic region with pale blackish brown radial and marginal bands (Fig. 2A). Chelicera with three apophyses; blunt proximo-lateral apophysis slightly protruding diagonally upward out of chelicera, small and blunt frontal apophysis protruding forward, and thick and pointed distal apophysis slightly protruding diagonally downward (Fig. 2C, D). Legs yellowish brown, retrolateral trichobothrium on tibia I at 8% proximally, tarsus I with 30 pseudosegments, femora, tibiae, and metatarsi with one or two pale blackish brown proximal and distal annuli, leg formula I-II-IV-III.

Abdomen elliptical, pale grayish brown with a long cardiac pattern and many blackish brown irregular spots (Fig. 2A). Palp (Fig. 2H-K): trochanter with blunt finger-shaped retrolatero-ventral apophysis, much shorter than femur; palpal tibia with a quadrangular prolatero-ventral modification (Fig. 2H); bulb pale yellowish brown, pocket-shaped; uncus dark blackish brown and almost rectangular with round and truncated sides having fine scales, edge rather smooth, pseudo-appendix absent; embolus weakly sclerotized and cut off-shaped with some semitransparent fringed distal processes, thick and long, curved (Fig. 2H, K); procursus large and long, brown with blackish brown margin, large ventral knee roundly swollen and strongly curved, two distal apophyses present, prolateral apophysis triangular with a pointed tip (numbered 1 in Fig. 2H-J) and ventrodistal apophysis long with a pointed tip (numbered 2 in Fig. 2H-J), one thin and short dorsal spine present (Fig. 8A).

Female (paratype). General appearance similar to male, habitus as in Fig. 2B. Total length 5.72. Carapace: 1.69 long/1.74 wide. Eyes: AER 0.60, PER 0.67, ALE 0.13, AME 0.12, PLE 0.17, PME 0.14, ALE-PLE contiguous, ALE-AME 0.04, AME-AME 0.04, AME-PME 0.06, PME-PLE 0.04, PME-PME 0.22. Chelicera: 0.83 long/0.27 wide. Endite: 0.55 long/0.31 wide. Labium: 0.30 long/0.37 wide. Sternum: 0.83 long/1.03 wide. Legs: I 34.95 (8.65, 0.65, 8.81, 14.52, 2.32), II 24.17 (6.57, 0.66, 6.03, 9.38, 1.53), III 17.67 (5.11, 0.61, 4.24, 6.58, 1.13), IV 23.80 (6.67, 0.63, 5.89, 9.19, 1.42), tibia I L/d 42. Palp: 1.27 (0.39, 0.18, 0.24, -, 0.46). Abdomen: 3.74 long/1.72 wide. Epigynum: 0.95 wide.

Legs yellowish brown, femora, tibiae, and metatarsi with one or two pale blackish brown proximal and distal annuli, leg formula I-II-IV-III. Epigynum (Fig. 2E, F): sclerotized, anterior epigynal plate strongly protruding, anterior arch with median portion straight, anterior epigynal plate and posterior epigynal plate far apart, both sides of median portion sclerotized postero-ventrally; small and short knob with a blunt tip. Internal genitalia (Fig. 2G): pore plates roundly triangular, longitudinal, and moderately far apart from each other.

Variation.

Tibia I in two paratype males (NIBR #NUHGIV0000000004-05): 11.24, missing. Tibia I in other five paratype females (NIBR #NUHGIV0000000007-11): 8.66 ± 0.44 (8.84, 8.83, 9.21, 8.10, 8.34).

Habitat.

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

Distribution.

South Korea (Mt. Duryunsan, Jeollanam-do) (Fig. 1A).

Etymology.

The specific name is a noun in apposition referring to the type locality, Mt. Duryunsan.