Agyneta furcula, 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 : 266-272

Agyneta furcula n. sp.

ũ래꼬ṘḍljHḑ (ṉÿ) ( Figs. 6 A-B, 12F-M)

Material examined. Holotype: ♂, mixed forest (37°41 ʹ 24 ʺ N, 128°30 ʹ 08 ʺ E, alt. 1030 m), Jinbu-myeon, Pyeongchang-gun, Gangwon-do, 20 July 2010, J. C. Lim. Paratypes: 2♂♂, 1$, same data as holotype .

Etymology. The specific name is a Latin noun “ furcula ” (small two-pronged fork), referring to the shape of lamella characteristica of male palp.

Diagnosis. The new species resembles A. subtilis ( Pickard-Cambridge, 1863) in the suprategular apophysis, paracymbium, lamella characteristica of male palp, and female epigynum, but different from the latter by the detail shapes of paracymbium and lamella characteristica ( Fig. 12F, J ).

Description. Male (holotype). Total length 1.93. Habitus as in Figure 6A . Carapace dirty brown, 0.88 long, 0.70 wide. Clypeus height 3.3 times of diameter of AME. AER 0.27, PER 0.30. AER recurved slightly and PER straight in dorsal view. AME 0.05, ALE 0.09, PME 0.08, PLE 0.07, AME-AME 0.03, AME-ALE 0.01, PME-PME 0.04, PME-PLE 0.03, AME-PME 0.08, and ALE-PLE 0.01. Median ocular quadrangle, height = posterior side>anterior side (13:9). Chelicera with two promarginal and a minute retromarginal teeth. Sternum 0.55 long, 0.47 wide. Labium 0.16 wide. Leg measurements: I 3.16 (0.83, 0.25, 0.80, 0.78, 0.50), II 2.97 (0.78, 0.25, 0.73, 0.73, 0.48), III and IV lost. Leg I/ c 3.59. Fem. I/c 0.94. Tib. I/c 0.91. Met. I/c 0.89. Pat. I + tib. I/c 1.19. Met. I/tar. I 1.56. Tm 1 0.61. Abdomen oval and dark brown, and 1.05 long, 0.70 wide. Palp ( Fig. 12 F-J): paracymbium with anterior pocket; suprategular apophysis clawlike; embolus curved; lamella

A B

characteristica with two braches - in lateral view upper one pointed, lower one serrate.

Female (paratype). Total length 2.40. Habitus as in Figure 6B . Carapace 1.00 long, 0.80 wide. Clypeus height 2.8 times of diameter of AME. AER 0.30, PER 0.33. AME 0.05, ALE 0.08, PME 0.08, PLE 0.07, AME-AME 0.04, AME-ALE 0.03, PME-PME 0.04, PME-PLE 0.03, AME-PME 0.08, and ALE-PLE 0.01. Median ocular quadrangle, height>posterior side>anterior side (16:15:10). Chelicera with a promarginal tooth. Sternum 0.62 long, 0.53 wide. Labium 0.17 wide. Leg measurements: I lost, II 3.06 (0.80, 0.28, 0.75, 0.75, 0.48), III 2.72 (0.73, 0.28, 0.65, 0.68, 0.38), IV 3.61 (0.98, 0.28, 0.95, 0.95, 0.45). Tm IV absent. Abdomen 1.70 long, 1.05 wide. Epigynum: small scape in middle; internal genitalia with a pair of spermathecae and curved copulatory ducts ( Fig. 12 K-M) .

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. 12. Diplostyla concolor(Wider, 1834) (A-E) and Agyneta furcula n. sp.(F-M):A, F - male left palp, retrolateral view; B, G - idem, prolateral view; H - embolic division, ventral view; I - idem, dorsal view; J - idem, lamella characteristica; C-D, K-L - epigynum; E, M - internal genitalia. Scale bars: 0.1 mm.