Arcuphantes pennatoides, 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 : 277-279

Arcuphantes pennatoides n. sp.

너P날fflḍljHḑ (ṉÿ) ( Figs. 6 J-K, 15E-H, K-M)

Material examined. Holotype: ♂, mixed forest (35°23 ʹ 35 ʺ N, 129°06 ʹ 21 ʺ E, alt. 631 m), Sangbuk-myeon, Yangsan-si , Gyeongsangnam-do, 27 September 2010, J. C. Lim . Paratypes: 2♂♂, 2$$, same data as holotype .

Etymology. The specific name is a Latin adjective “ pennatus ” (winged) having the suffix “- oides ” (resembling).

Diagnosis. The new species is very similar to A. chilboensis n. sp., A. pennatus Paik, 1983 and A. scitulus Paik, 1974 in the male palp appearance, but different from A. chilboensis n. sp. by the shapes of paracymbial upper branch, posterior part of radix and rectangular pseudolamella tip, and the position of lamellar extension on the posterior part of radix; clearly different from A. pennatus by the shapes of paracymbial upper branch, pseudolamella, and the process of posterior part of radix; and easily distinguished from A. scitulus by the shapes of paracymbial upper branch, pseudolamella and lamellar extension. ( Fig. 15 E-J).

Description. Male (holotype). Total length 2.24. Habitus as in Figure 6J . Carapace dirty brown, 1.12 long, 0.96 wide. Clypeus height 1.7 times of diameter of AME. AER 0.42, PER 0.46. Both eye rows recurved in dorsal view. AME 0.08, ALE 0.12, PME 0.10, PLE 0.09, AME-AME 0.01, AME-ALE 0.05, PME-PME 0.05, PME-PLE 0.05, AME-PME 0.08, and ALE-PLE contiguous. Median ocular quadrangle, posterior side>eight>anterior side (18:17:12). Chelicera with a tooth on each margin. Sternum 0.61 long, 0.61 wide. Labium 0.20 wide. Abdomen oval and dark brown with blurry white bands on both margins anteriorly, 1.12 long, 0.72 wide. Palp ( Fig. 15 E-H): paracymbium bifurcated by a broad low- er branch with convolute tip and a round spatula-like upper branch, with a small hooked proximal process and a small sharp-pointed lateral process; pit hook of suprategulum distinct; anterior part of median membrane round, chitinized. Embolic division: anterior part of radix hook-like; posterior part broad; embolus proper and apex small and pointed; anterior terminal apophysis blunt, median one membranous with a serrated margin and papillae; pseudolamella rectangular; lamellar extension long, membranous.

Female (paratype). Total length 1.80. Habitus as in Figure 6K . Carapace 0.96 long, 0.80 wide. Clypeus height 2.8 times of diameter of AME. AER 0.36, PER 0.39. AME 0.05, ALE 0.10, PME 0.08, PLE 0.09, AME-AME 0.02, AME-ALE 0.05, PME-PME 0.05, PME-PLE 0.04, AME-PME 0.08, and ALE-PLE contiguous. Median ocular quadrangle, posterior side>eight>anterior side (17:16:10). Chelicera with three promarginal and five retromarginal teeth. Sternum 0.51 long, 0.55 wide. Labium 0.18 wide. Abdomen 1.04 long, 0.72 wide. Epigynum: scape coiled, basal part broad; posterior median plate with three projections posteriorly; distal part of scape with well-developed lateral lobes ( Fig. 15 K-M) .

Habitat. Mixed forest.

World Distribution. Korea (Gyeongsangnam-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.