Pholcus seorakensis, Seo, 2018

Seo, Bo Keun, 2018, New species and records of the spider families Pholcidae, Uloboridae, Linyphiidae, Theridiidae, Phrurolithidae, and Thomisidae (Araneae) from Korea, Journal of Species Research 7 (4), pp. 251-290 : 256

Pholcus seorakensis n. sp.

ẖọșỢHḑ (ṉÿ) ( Figs. 1 G-H, 3G-L)

Material examined. Holotype: ♂, mixed forest (38°11 ʹ 31 ʺ N, 128°21 ʹ 26 ʺ E, alt. 383 m), Buk-myeon, Inje-gun, Gangwon-do, 8 June 2010, J. C. Lim. Paratypes: 1♂,

2$$, same data as holotype.

Etymology. The specific name comes from the type lo- cality, Mt. Seorak.

Diagnosis. The new species resembles P. chiakensis Seo, 2014 in the retrolateral view of male palp, but can be distinguished from the latter by the distal margin of procursus, the shapes of uncus tip and appendix, the anterior plate of epigynum and anterior chitinized plate of internal genitalia ( Fig. 3 G-L).

Description. Male (holotype). Total length 5.30. Habitus as in Figure 1G . Carapace 1.70 long, 1.60 wide, circular and yellow, with brown radiated stripes. Clypeus height 5 times of diameter of AME. AER 0.64, PER 0.69. AME 0.12, ALE 0.16, PME 0.16, PLE 0.17, AME-AME 0.07, AME-ALE 0.04, PME-PME 0.22, PME-PLE 0.04, AME-PME 0.07, and ALE-PLE 0.03. Median ocular quadrangle, posterior side>height>anterior side (38:25:21). Sternum 0.80 long, 1.05 wide. Labium 0.33 wide. Leg measurements: I 44.80 (11.90, 0.70, 11.10, 18.90, 2.20), II 30.10 (8.20, 0.60, 7.50, 12.20, 1.60), III 20.90 (5.80, 0.60, 1.70, 8.60, 1.20), IV 26.70 (7.70, 0.60, 6.70, 10.30, 1.40). Leg I/c 26.35. Fem. I/c 7.00. Tib. I/c 6.53. Met. I/c 11.12. Pat. I + tib. I/c 6.94. Met. I/tar. I 8.59. Met. IV/tar. IV 7.36. Abdomen 3.60 long, 1.50 wide, and elongate; dorsum yellow with brown dots. Palp ( Fig. 3 GJ): trochanter with a blunt apophysis; chtinized broad membrane with three processes at margin, below procursus ridge; bulb with blunt tipped uncus, embolus with feather-like tip, and a hook-shaped appendix.

Female (paratype). Total length 5.10. Habitus as in Figure 1H . Carapace 1.50 long, 1.40 wide. Clypeus height 4.5 times of diameter of AME. AER 0.60, PER 0.62. AME 0.10, ALE 0.17, PME 0.14, PLE 0.17, AME-AME 0.05, AME-ALE 0.04, PME-PME 0.18, PME-PLE 0.01, AME-PME 0.07, and ALE-PLE 0.01. Median ocular quadrangle, posterior side>height>anterior side (33:24:19). Sternum 0.75 long, 1.00 wide. Labium 0.33 wide. Leg measurements: I 29.00 (7.20, 0.60, 7.30, 11.90, 2.00), II 20.30 (5.50, 0.60, 5.20, 7.70, 1.30), III 15.10 (4.30, 0.60, 3.80, 5.40, 1.00), IV 20.40 (6.00, 0.60, 5.20, 7.40, 1.20). Leg I/c 19.33. Fem. I/c 4.80. Tib. I/c 4.87. Met. I/c 7.93. Pat. I + tib. I/c 5.27. Met. I/tar. I 5.95. Met. IV/tar. IV 6.17. Abdomen 3.40 long, 2.10 wide, and elongate. Epigynum: anterior plate with slightly concave posterior margin; posterior plate with a blunt knop; internal genitalia with a pair of pore plates and sclerotized broad plate anteriorly ( Fig. 3 K-L).

Habitat. Mixed forest.

World Distribution. Korea (Gangwon-do).

Deposition. NIBR.

Identifier. Bo Keun Seo.

Figures

Fig. 1. Habitus of five Pholcus species: A - P. jindongensis n. sp., male; B - idem, female; C - P. piagolensis n. sp., male; D - idem, female; E - P. pyeongchangensis n. sp., male; F - idem, female; G - P. seorakensis n. sp., male; H - idem, female; I - P. uiseongensis n. sp., male; J - idem, female. Scale bars: 0.5 mm.

Fig. 3. Pholcus pyeongchangensis n. sp.(A-F) and Pholcus seorakensis n. sp.(G-L): A - male right palp, prolateral view; B - idem, retrolateral view; C - idem, genital bulb and procursus, dorsal view; D - idem, embolus and uncus, retrolateral view; E, K - epigynum; F, L - internal genitalia; G - male left palp, retrolateral view; H - idem, prolateral view; I - idem, genital bulb and procursus, dorsal view; J - idem, embolus and uncus, retrolateral view. Scale bars: 0.5 mm (A-C, G-I), 0.1 mm (D-F, J-L).