Pelecopsis brunea, 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 : 263

Pelecopsis brunea n. sp.

ũNjPnjḍljHḑ (ṉÿ) ( Figs. 5 K-L, 9I-O)

Material examined. Holotype: ♂, mixed forest in small island (34°40 ʹ 15 ʺ N, 125°21 ʹ 57 ʺ E, alt. 112 m), Heuksan-myeon, Sinan-gun , Jeollanam-do, 25 July 2007, S. Y. Kim . Paratypes: 1$, same data as holotype; 1♂, mixed forest in valley (35°45 ʹ 53 ʺ N, 128°04 ʹ 22 ʺ E, alt. 526 m), Gaya-myeon, Hapcheon-gun , Gyeongsangnam-do, 12 August 2007, B. K. Seo .

Etymology. The specific name is a Latin adjective “ brunea ” (brown), referring to the carapace color of the type specimens.

Diagnosis. The new species resembles P. parallela ( Wider, 1834) in the male carapace and the embolus shape of male palp, but different from the latter by the shapes of tibial apophyses, terminal apophysis, and copulatory ducts of internal genitalia ( Fig. 9 I-L, O).

Description. Male (holotype). Total length 1.54. Habitus as in Figure 5K . Carapace brown with a pair of sulci behind PLE, 0.72 long, 0.64 wide; cephalon slightly elevated. Clypeus height 2.5 times of diameter of AME. AER 0.29, PER 0.30. AER recurved and PER procurved strongly in dorsal view. AME 0.05, ALE 0.07, PME 0.07, PLE 0.07, AME-AME 0.03, AME-ALE 0.03, PME-PME 0.04, PME-PLE 0.04, AME-PME 0.08, and ALE-PLE contiguous. Median ocular quadrangle, height>posterior side>anterior side (14:12:9). Chelicera with five promarginal and six retromarginal teeth. Sternum 0.47 long, 0.47 wide. Labium 0.16 wide. Leg measurements: I 2.20 (0.61, 0.23, 0.55, 0.46, 0.35), II 2.01 (0.55, 0.22, 0.47, 0.43, 0.34), III 1.65 (0.44, 0.20, 0.35, 0.36, 0.30), IV 2.26 (0.65, 0.21, 0.57, 0.49, 0.34). Leg I/c 3.06. Fem. I/c 0.85. Tib. I/c 0.76. Met. I/c 0.64. Pat. I + tib. I/c 1.08. Met. I/tar. I 1.31. Met. IV/tar. IV 1.44. Chaetotaxy 1-1-1-1 (male paratype). Tm 1 0.49, Tm IV absent. Abdomen oval and dirty brown, and 1.04 long, 0.70 wide. Palp (Fig. I-L): tibia with a dorsal apophysis and a blunt retrolateral apophysis; tegular apophysis broad and blunt; embolus curved; terminal apophysis spiral with U-shaped chitinized tip.

Female (paratype). Total length 2.04 Habitus as in Figure 5L . Carapace 0.76 long, 0.66 wide. Clypeus height 2 times of diameter of AME. AER 0.27, PER 0.30. AME 0.05, ALE 0.08, PME 0.07, PLE 0.08, AME-AME 0.03, AME-ALE 0.03, PME-PME 0.05, PME-PLE 0.03, AME-PME 0.07, and ALE-PLE contiguous. Median ocular quadrangle, posterior side>height>anterior side (14:13:9). Chelicera with seven promarginal and four retromarginal teeth. Sternum 0.46 long, 0.47 wide. Labium 0.20 wide. Leg measurements: I 2.16 (0.62, 0.25, 0.51, 0.43, 0.35), II 1.95 (0.56, 0.23, 0.43, 0.39, 0.34), III 1.72 (0.47, 0.23, 0.35, 0.38, 0.29), IV 2.36 (0.68, 0.23, 0.62, 0.49, 0.34). Leg I/c 2.84. Fem. I/c 0.82. Tib. I/c 0.67. Met. I/c 0.57. Pat. I + tib. I/c 1.23. Met. I/tar. I 1.23. Met. IV/tar. IV 1.44. Chaetotaxy 0-0-0-1. Tm 1 0.52, Tm IV absent. Abdomen 1.40 long, 0.30 wide. Epigynum: atrium broad with a pair of logitudinal plates; internal genitalia with a pair of copulatory ducts under longitudinal plates and a pair of copulatory openings at posterior margin ( Fig. 9 M-O).

Habitat. Mixed forest.

World Distribution. Korea (Gyeongsangnam-do, Jeollanam-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. 9. Pelecopsis bigibba n. sp. (A-H) and Pelecopsis brunea n. sp. (I-O): A - male head, frontal view; B - idem, lateral view; C, I - male left palp, retrolateral view; D, J - prolateral view; E, K - idem, ventral view; L - idem, tibial apophysis, dorsal view; F-G, M-N - epigynum; H, O - internal genitalia. Scale bars: 0.1 mm.