Walckenaeria supercilia, 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 : 265-266

Walckenaeria supercilia n. sp.

ḵḏậjḍljHḑ (ṉÿ) ( Figs. 5R , 11 J-N)

Material examined. Holotype: ♂, mixed forest (36°49 ʹ 38 ʺ N, 129°06 ʹ 00 ʺ E, alt. 713 m), Subi-myeon, Yeongyang-gun , Gyeongsangbuk-do, 24 May 2015, B. K. Seo.

Etymology. The specific name is a Latin noun “ supercilia ” (eyebrow), referring to a pair of bristle tufts above AER.

Diagnosis. The new species is very similar to W. chikunii Saito and Ono, 2001 in the general appearance and the structure of male palp, but different from the latter by the shapes of retrolateral tibial apophysis, distal suprategular apophysis, head elevation, the interval of AER, and the curvature of AER in frontal view ( Fig. 11 J-N).

Description. Male (holotype). Total length 1.72. Habitus as in Figure 5R . Carapace reddish brown, 0.84 long, 0.60 wide; cephalon elevated with a pair of bristle tufts above AER and a pair of ocular sulci behind PLE ( Fig. 11 J-K). Clypeus height 2.3 times of diameter of AME. AER 0.25, PER 0.27. AER recurved and PER procurved in dorsal view. AME 0.05, ALE 0.08, PME 0.07, PLE 0.07, AME-AME 0.01, AME-ALE 0.01, PME-PME 0.03, PME-PLE 0.04, AME-PME 0.09, and ALE-PLE contiguous. Median ocular quadrangle, height>posterior side>anterior side (16:13:9). Chelicera with four teeth on each margin. Sternum 0.57 long, 0.48 wide. Labium 0.16 wide. Leg measurements: I 2.19 (0.64, 0.23, 0.53, 0.43, 0.36), II 2.09 (0.61, 0.23, 0.51, 0.39, 0.35), III 1.82 (0.51, 0.21, 0.39, 0.38, 0.33), IV 2.40 (0.65, 0.23, 0.64, 0.52, 0.36). Leg I/c 2.61. Fem. I/c 0.76. Tib. I/c 0.63. Met. I/c 0.51. Pat. I + tib. I/c 0.90. Met. I/tar. I 1.19. Met. IV/tar. IV 1.44. Chaetotaxy 2-2-1-1. Tm 1 0.36, Tm IV present. Abdomen oval and dark brown, and 0.98 long, 0.70 wide. Palp ( Fig. 11 L-N): tibia with three apophyses - prolateral one long and curved, retrolateral one membranous and chitinized, and ventral one blunt-

ed; embolus circular.

Habitat. Mixed forest.

World Distribution. Korea (Gyeongsangbuk-do).

Deposition. NIBR.

Identifier. Bo Keun Seo.

Figures

Fig. 5. Habitus of linyphiid species (I): A -Cnephalocotes ferrugineus n. sp., male; B - idem, female; C - Diplocephaloides falcatus n. sp., male; D - idem, female; E - Hylyphantes nigritus (Simon, 1881), male; F - idem, female; G - Hypselistes australis Saito and Ono, 2001, female; H - Metopobactrus cornis n. sp., male; I - Pelecopsis bigibba n. sp., male; J - idem, female; K - Pelecopsis brunea n. sp., male; L - idem, female; M - Pelecopsis montana n. sp., male; N - Tapinocyba parva n. sp., male; O - idem, female; P - Tapinocyba subula n. sp., male; Q - idem, female; R - Walckenaeria supercilia n. sp., male; S - Diplostyla concolor(Wider, 1834), male; T - idem, female. Scale bars: 0.5 mm.

Fig. 11. Tapinocyba subula n. sp.(A-I) and Walckenaeria supercilia n. sp.(J-N): A, K - male head, frontal view; B, J - idem, lateral view; C, L - male left palp, retrolateral view; D - idem, prolateral view; E, M - idem, ventral view; F, N - idem, tibial apophysis, dorsal view; G-H - epigynum; I - internal genitalia. Scale bars: 0.1 mm.