Arcuphantes pyeongchangensis, 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 : 279

Arcuphantes pyeongchangensis n. sp.

%ǧ나IJḍljHḑ (ṉÿ) ( Figs. 6L , 16 A-D)

Material examined. Holotype: ♂, mixed forest (37°41 ʹ 12 ʺ N, 128°30 ʹ 14 ʺ E, alt. 977 m), Jinbu-myeon, Pyeongchang-gun, Gangwon-do, 20 July 2010, J. C. Lim.

Etymology. The specific name comes from the type lo- cality, Pyeongchang County.

Diagnosis. The new species is easily distinguished from its congeneric species by the shape of paracymbial branches, posterior part of radix, pseudolamella, and lamellar extension (Fig. A-D).

Description. Male (holotype). Total length 1.80. Habitus as in Figure 6L . Carapace dark brown, 0.95 long, 0.80 wide. Clypeus height 3 times of diameter of AME. AER 0.32, PER 0.35. Both eye rows recurved in dorsal view. AME 0.05, ALE 0.08, PME 0.08, PLE 0.08, AME-AME 0.02, AME-ALE 0.04, PME-PME 0.04, PME-PLE 0.04, AME-PME 0.08, and ALE-PLE 0.01. Median ocular quadrangle, posterior side>height>anterior side (15:14:10). Chelicera with three promarginal and four minute retromarginal teeth. Sternum 0.55 long, 0.53 wide. Labium 0.16 wide. Abdomen oval and dark brown, and 0.95 long, 0.63 wide. Palp ( Fig. 16 A- D): paracymbium bifurcated by bilaminar broad low- er branch and a flat spatula-like upper branch, with a small proximal process and a pointed lateral process; pit hook of suprategulum distinct; anterior part of median membrane round, chitinized, other median membrane transparent with a papillae portion. Embolic division: anterior part of radix hook-like; posterior part blunt; embolus proper and apex small and pointed; anterior terminal apophysis triangular, median one membranous with a serrated margin and papillae; pseudolamella long, narrow, with a serrated margin and a pointed lateral process; lamellar extension membranous, chitinized.

Habitat. Mixed forest.

World Distribution. Korea (Gangwon-do).

Deposition. NIBR.

Identifier. Bo Keun Seo.

Figures

Fig. 6. Habitus of linyphiid species (II): A - Agyneta furcula n. sp., male; B - idem, female; C - Agyneta insulana Tanasevitch, 2000, male; D - Arcuphantes chiakensis n. sp., male; E - idem, female; F - Arcuphantes chilboensis n. sp., male; G - idem, female; H - Arcuphantes longiconvolutus n. sp., female; I - Arcuphantes namweonensis n. sp., male; J - Arcuphantes pennatoides n. sp., male; K - idem, female; L - Arcuphantes pyeongchangensis n. sp., male; M - Collis flavus n. sp., male; N - idem, female; O - Collis pusillus n. sp., male; P - idem, female; Q - Collis silvaticus n. sp., male; R - Doenitzius minutus n. sp., female; S - Nippononeta bituberculata n. sp., male; T - idem, female. Scale bars: 0.5 mm.

Fig. 16. Arcuphantes pyeongchangensis n. sp.(A-D) and Collis flavus n. sp.(E-K): A, E - male left palp, retrolateral view; B, F - idem, prolateral view; C - embolic division, ventral view; D - idem, process of posterior part of radix; G - paracymbium; H - lamella characteristica; I-J - epigynum; K - internal genitalia. Scale bars: 0.1 mm.