Cybaeus seorakensis, Seo, 2016

Seo, Bo Keun, 2016, Seven new species of the genus Cybaeus (Araneae, Cybaeidae) from Korea, Journal of Species Research 5 (3), pp. 571-583 : 579-582

Cybaeus seorakensis n. sp.

ẖĝƌặHŔ (ṳAE) ( Figs. 3 F­H, 5K, 6P­R)

Material examined. Holotype: ♂, mixed forest (38°10′ 32″N, 128°22′18″E, alt. 559 m), 12.5 km north­northwest of Baekdam Temple in Mt. Seorak , Buk­myeon , Injegun, Gangweon­do, 19 July 2010, J. C. Lim.

Etymology. The specific name comes from the type lo­ cality, Mt. Seorak.

Diagnosis. The new species is similar to C. ilweolensis n. sp. in the abdominal pattern, but can be distinguished from the latter by the short embolus of male palp, the narrow interval between the embolic base and the conductor of male palp, and the slightly two­humped apophysis of male palpal patella ( Figs. 3 F­H, 5K).

Description. Male (holotype). Total length 8.90. Habitus as in Fig. 5K . Carapace reddish brown, 5.20 long, 3.90 wide; radial grooves and linear fovea distinct. Clypeus height 2.3 times of diameter of ALE. AER 1.05, PER 1.25; AER retrocurved slightly and PER straight in dorsal view. AME 0.20, ALE 0.26, PME 0.25, PLE 0.26, AME­AME 0.09, AME­ALE 0.04, PME­PME 0.23, PME­PLE 0.13, AME­PME 0.22, and ALE­PLE 0.05. Median ocular quadrangle, posterior side>height>anterior side (55: 50: 36). Chelicera with three promarginal and eight minute retromarginal teeth. Sternum 2.30 long, 1.90 wide. Labium 0.70 long, 0.70 wide. Leg measurements: I 21.10 (5.30, 1.90, 5.70, 5.50, 2.70), II 16.80 (4.20, 1.70, 4.20, 4.40, 2.30), III 14.30 (3.80, 1.50, 3.00, 3.90, 2.10), IV 17.30 (4.30, 1.50, 4.00, 5.10, 2.40). Palp 6.10 (2.50, 0.80, 0.60, 2.20). Leg I/c 4.06. Fem. I/c 1.02. Tib. I/c 1.10. Met. I/c 1.06. Pat. I + tib. I/c 1.46. Met. I/ tar. I 2.04. Met. IV/tar. IV 2.13. Leg spination pattern: Femora; I d1­1­1, p0­0­0­1­1; II d1­1­1, p0­0­0­1­1, r0­ 1­1; III d1­1­1, p0­1­1, r0­1­1; IV d1­1­1, p0­1­1, r0­0­ 1. Tibiae; I p1­1, v2­2­2­0­2; II p1­1­1, v2­2­1­0­2; III d1­1, p1­1­1, r1­1, v2­2­2; IV d1­1, p1­1­1, r0­1­1, v2­ 1­2. Metatarsi; I p1­1­1, r0­1­1­1, v2­0­0­0; II p1­1­1­ 1­2, r0­1­1­1, v2­0­0­1; III p1­1­1­1­1­2, r1­1­1­2, v2­ 2­1; IV p1­2­2, r1­1­1­2, v2­2­1. Abdomen oval and dark gray, with two pairs of pale dots and three chevrons longitudinally, and 4.20 long, 2.90 wide. Palp ( Figs. 3 FH, 6P­R): tibia shorter than patella; patella apophysis slightly two­humped with 35 conical teeth; embolus short and slender; interval between embolic base and conductor narrow.

Habitat. Mixed forest.

World Distribution. Korea (Gangweon­do).

Figures

Fig. 3. Cybaeus odaensis n. sp.(A­E) and Cybaeus seorakensis n. sp. (F­H): A, F ­ male left palp, ventral view; B, G ­ male left palp, tibia and patella, dorsal view; C, H­ditto, retrolateral view; D ­female internal genitalia, ventral view; E ­ditto, dorsal view. Scale lines: 0.1 mm.

Fig. 5. Carapaces and abdomens: A ­ Cybaeus geumensis, female; B ­ C. geumensis, male; C ­ C. ilweolensis, female; D ­ C. ilweolensis, male; E ­ C. jiriensis, female; F ­C. jiriensis, male; G ­ C. jogyensis, female; H ­ C. jogyensis, male; I­ C. odaensis, female; J ­C. odaensis, male; K ­C. seorakensis, male; L­ C. songniensis, female; M ­C. songniensis, male. Scale lines: 1.0 mm.