Arcuphantes namweonensis, 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 : 277

Arcuphantes namweonensis n. sp.

Ṟù나IJḍljHḑ (ṉÿ) ( Figs. 6I , 15 A-D)

Material examined. Holotype: ♂, mixed forest (35°20 ʹ 18 ʺ N, 127°32 ʹ 01 ʺ E, alt. 780 m), Sannae-myeon, Namwon-si , Jeollabuk-do, 1 October 2009, B. K. Seo.

Etymology. The specific name comes from the type lo- cality, Namwon city.

Diagnosis. The new species is easily distinguished from its congeneric species by paracymbium and embolic division ( Fig. 15 A-D).

Description. Male (holotype). Total length 2.56. Habitus as in Figure 6I . Carapace light dirty brown, 1.36 long, 1.20 wide. Clypeus height 2.7 times of diameter of AME. AER 0.46, PER 0.49. Both eye rows recurved in dorsal view. AME 0.08, ALE 0.12, PME 0.10, PLE 0.10, AME-AME 0.02, AME-ALE 0.07, PME-PME 0.05, PME-PLE 0.05, AME-PME 0.09, and ALE-PLE contiguous. Median ocular quadrangle, posterior side>height>anterior side (20:19:13). Chelicera with a tooth on each margin. Sternum 0.72 long, 0.72 wide. Labium 0.22 wide. Abdomen oval and dark brown, 0.88 long, 0.58 wide; dorsum with a pair of white band on both margins anteriorly and a white transverse stripe posteriorly. Palp ( Fig. 15 A-D): paracymbium bifurcat- ed by broad branches, with a small hooked proximal process and a small sharp-pointed lateral process; pit hook of suprategulum indistinct; anterior part of medi- an membrane round, chitinized. Embolic division: anterior part of radix hook-like; posterior part broad and sharp; embolus proper and apex small and pointed; anterior terminal apophysis elongate and pointed, median one membranous with a serrated margin and papillae; pseudolamella hatchet-like distally; lamellar extension long, membranous.

Habitat. Mixed forest.

World Distribution. Korea (Jeollabuk-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. 15. Arcuphantes namweonensis n. sp.(A-D), Arcuphantes pennatoides n. sp.(E-H, K-M), and Arcuphantes pennatus Paik, 1983 (I-J): A, E - male left palp, retrolateral view; B, F - idem, prolateral view; C, G, I - embolic division, ventral view; D, H, J - idem, process of posteri- or part of radix; K - epigynum, ventral view; L - idem, posterior view; M - idem, lateral view. Scale bars: 0.1 mm.