Tapinocyba parva, 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 : 264-265

Tapinocyba parva n. sp.

꼬ṘüűḍljHḑ (ṉÿ) ( Figs. 5 N-O, 10G-N)

Material examined. Holotype: ♂, broad-leaf bamboo ( Sasa borealis ) patch beside creek (35°26 ʹ 49 ʺ N, 126°50 ʹ 50 ʺ E, alt. 132 m), Bukha-myeon, Jangseong-gun , Jeollanam-do, 12 May 2006, B. K. Seo . Paratypes: 16♂ ♂, 1$, same data as holotype ; 1♂, 1$, mixed forest (35°27 ʹ 56 ʺ N, 126°52 ʹ 37 ʺ E, alt. 376 m), Bokheung-myeon, Sunchang-gun , Jeollabuk-do, 19 May 2007, B. K. Seo .

Etymology. The specific name is a Latin adjective “ parva ” (small), referring to the body size of the type specimens.

Diagnosis. The new species resembles T. silvicultrix Saito, 1980 in the prolateral tibial apophysis of male palp, but different from the latter by the dorsal tibial apophysis, the embolic division of male palp, and female genitalia. The new species is also similar to T. corsica ( Simon, 1884) in the genitalia, but easily distinguished from the latter by the posterior spermathecae of female and the embolic division of male palp ( Fig. 10 GK, N).

Description. Male (holotype). Total length 1.18. Habitus as in Figure 5N . Carapace light brown, 0.70 long, 0.52 wide; cephalon with a pair of sulci behind PLE. Clypeus height 3 times of diameter of AME. AER 0.22, PER 0.23. AER recurved and PER slightly procurved in dorsal view. AME 0.04, ALE 0.05, PME 0.04, PLE 0.04, AME-AME contiguous, AME-ALE 0.03, PME-PME 0.04, PME-PLE 0.05, AME-PME 0.07, and ALE-PLE contiguous. Median ocular quadrangle, height>posterior side>anterior side (12:9:6). Chelicera with six promarginal and five retromarginal teeth. Sternum 0.40 long, 0.34 wide. Labium 0.10 wide. Leg measurements: I 1.46 (0.44, 0.17, 0.34, 0.26, 0.25), II 1.31 (0.38, 0.16, 0.29, 0.23, 0.25), III 1.07 (0.30, 0.14, 0.21, 0.21, 0.21), IV 1.41 (0.42, 0.16, 0.35, 0.26, 0.22). Leg I/c 2.09. Fem. I/c 0.63. Tib. I/c 0.49. Met. I/c 0.37. Pat. I + tib. I/c 0.73. Met. I/tar. I 1.04. Met. IV/tar. IV 1.18. Chaetotaxy 1-1-1-1. Tm 1 0.50, Tm IV absent. Abdomen oval and dark brown, and 0.55 long, 0.40 wide. Palp ( Fig. 10 GK): tibia with three apophyses - prolateral one long and slender, with hand-like tip, and retrolateral one short, pointed curved, and dorsal one round, broad; embolus short and coiled; distal suprategular apophysis membranous, chitinized, and broad; terminal apophysis at base of embolus, small and pointed.

Female (paratype). Total length 1.05. Habitus as in Figure 5O . Carapace 0.65 long, 0.48 wide. Clypeus height 2 times of diameter of AME. AER 0.17, PER 0.21. AME 0.03, ALE 0.05, PME 0.04, PLE 0.04, AME-AME 0.01, AME-ALE 0.01, PME-PME 0.03, PME-PLE 0.03, AME-PME 0.05, and ALE-PLE contiguous. Median ocular quadrangle, posterior side = height>anterior side (3:2). Chelicera with six promarginal and five retromarginal teeth. Sternum 0.35 long, 0.34 wide. Labium 0.13 wide. Leg measurements: I 1.31 (0.39, 0.18, 0.27, 0.21, 0.26), II 1.22 (0.34, 0.17, 0.26, 0.20, 0.25), III 1.05 (0.30, 0.14, 0.21, 0.20, 0.20), IV 1.34 (0.42, 0.16, 0.33, 0.22, 0.21). Leg I/c 2.02. Fem. I/c 0.60. Tib. I/c 0.42. Met. I/ c 0.32. Pat. I + tib. I/c 0.69. Met. I/tar. I 0.81. Met. IV/ tar. IV 1.05. Chaetotaxy 1-1-1-1. Tm 1 0.5, Tm IV absent. Abdomen 0.59 long, 0.40 wide. Epigynum: atrium broad with chevron-like anterior margin; internal genitalia with copulatory openings, copulatory ducts, and spermathecae anteriorly ( Fig. 10 L-N).

Habitat. Broad-leaf bamboo ( Sasa borealis ) patch.

World Distribution. Korea (Jeollanam-do, Jeollabuk-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. 10. Pelecopsis montana n. sp. (A-F) and Tapinocyba parva n. sp. (G-N): A - male head, lateral view; B - idem, frontal view; C, G - male left palp, retrolateral view; D, H - prolateral view; E, J - idem, ventral view; I - idem, tip of prolateral tibial apophysis; K - idem, tibial apophysis, dorsal view; L-M - epigynum; N - internal genitalia. Scale bars: 0.01mm (I), 0.1 (rest).