Cybaeus odaensis, 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 : 576-579

Cybaeus odaensis n. sp.

21ƌặHŔ (ṳAE) ( Figs. 3 A­E, 5I, J, 6M­O, 7M­O)

Material examined. Holotype: ♂, mixed forest (37°41′

12″N, 128°30′14″E, alt. 977 m), 12 km south­southwest of the summit of Mt. Odae , Jinbu­myeon , Pyeonchanggun, Gangweon­do, 20 July 2010, J. C. Lim. Paratype: 2$$, 26♂♂, same data as holotype .

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

Diagnosis. The new species is easily separated from all other Cybaeus species by the mottled pattern on the abdomen, the cymbium with lengthened tip, the very short embolus in male palp, the narrow interval between the embolic base and the conductor of male palp, the small number of teeth on the round apophysis of male palpal patella, the narrow atrium, and the small ventral vesicle and the short copulatory duct connected with ventral vesicle of female spermatheca ( Figs. 3 A­E, 5I, J, 7M­O). Description. Male (holotype). Total length 7.30. Habitus as in Fig. 5J . Carapace brown, 4.03 long, 2.90 wide; radial grooves and linear fovea distinct. Clypeus height 2.8 times of diameter of ALE. AER 0.85, PER 1.05 ; AER and PER retrocurved slightly in dorsal view. AME 0.13, ALE 0.23, PME 0.21, PLE 0.21, AME­AME 0.09, AME­ALE 0.04, PME­PME 0.16, PME­PLE 0.14, AME­PME 0.26, and ALE­PLE 0.07. Median ocular quadrangle, height>posterior side>anterior side (42: 41: 26). Chelicera with three promarginal and eight minute retromarginal teeth. Sternum 1.83 long, 1.76 wide. Labium 0.63 long, 0.63 wide. Leg measurements: I 23.10 (5.60, 1.70, 6.70, 6.70, 2.40), II 19.70 (4.90, 1.50, 5.40, 5.70, 2.20), III 12.90 (3.50, 1.20, 2.80, 3.70, 1.70), IV 16.40 (4.10, 1.30, 3.70, 5.10, 2.20). Palp 4.80 (1.80, 0.70, 0.50, 1.80). Leg I /c 5.73. Fem. I /c 1.39. Tib. I /c 1.66. Met. I /c 1.66. Pat. I + tib. I/c 2.08. Met. I /tar. I 2.79. Met. IV /tar. IV 2.32. Leg spination pattern: Femora; I d1­1­0, p0­0­1; II d1­1­0, p0­0­1, r0­1­0; III d1­1­1, p0­ 1­1, r0­1­1; IV d1­1­1, p0­1­1, r0­0­1. Tibiae; I p1­1­1­ 1­1­1­1, v2­1­1­1­1; II p1­1­1, v2­2­2­1­2; III p1­1­1, r0­1­1, v2­2­0­2; IV d1­1, p1­1­1, r0­1­1, v2­1­2. Metatarsi; I p1­1­1­1, r1­1­1­1; II p1­1­1­1, r1­0­0, v2­2­2; III d1­1, p1­1­1­1­2, r0­1­2, v2­2­1; IV p1­1­1­2, r1­1­1­ 1­2, v2­2­1. Abdomen oval and mottled dark gray, with two pairs of pale dots and four chevrons longitudinally, and 3.78 long, 2.39 wide. Palp ( Figs. 3 A­C, 6M­O): tibia shorter than patella; patella apophysis round with 18 conical teeth; embolus very short and slender; interval between embolic base and conductor narrow .

Female (paratype). Total length 7.40. Habitus as in Fig. 5I . Carapace 3.78 long, 2.84 wide. Clypeus height 2.4 times of diameter of ALE. AER 0.83, PER 1.05 . AME 0.12, ALE 0.21, PME 0.20, PLE 0.21, AME­AME 0.12, AME­ALE 0.05, PME­PME 0.16, PME­PLE 0.16, AME­PME 0.25, and ALE­PLE 0.08. Median ocular quadrangle, height>posterior side>anterior side (40: 39: 28). Chelicera with three promarginal and eight minute retromarginal teeth. Sternum 1.70 long, 1.64 wide. Labium 0.50 long, 0.57 wide. Leg measurements: I 11.22(2.90, 1.26, 2.96, 2.71, 1.39), II 10.52 (2.90, 1.20, 2.58, 2.52, 1.32), III 9.13 (2.52, 1.13, 1.95, 2.33, 1.20), IV 12.03 (3.21, 1.13, 2.71, 3.34, 1.64). Palp 4.16 (1.32, 0.63, 0.76, 1.45). Leg I /c 2.97. Fem. I /c 0.77. Tib. I /c 0.78. Met. I /c 0.72. Pat. I + tib. I/c 1.12. Met. I /tar. I 1.95. Met. IV /tar. IV 2.04. Leg spination pattern: Femora; I d1­1­0, p0­1; II d1­1­0, p0­0­1, r0­1­0; III d1­1­1, p0­1­ 1, r0­1­1; IV d1­1­1, p0­1­1, r0­0­1. Tibiae; I d1­1, p1­1­ 0­0, v2­2­2­2­2; II d0­0­1, p1­1­1, r0­0­1, v2­2­2­1; III d1­1, p1­1­1, r1­1, v2­2­2; IV d1­1, p1­1­1, r1­1, v2­1­ 2. Metatarsi; I d1­0­0, p1­1, r1­1, v2­2­0; II d1­0­0, p1­ 1­1­1, r1­1, v2­2­1; III d1­0­0, p1­1­2, r1­1­1­0­2, v2­ 2­1; IV p1­1­2, r1­1­1­0­2, v2­2­1. Abdomen 4.41 long, 3.59 wide. Epigynum: atrium narrow, with a pair of copulatory openings. Internal genitalia: spermatheca with an ventral small vesicle and a dorsal gourd­like vesicle; short copulatory duct connected with ventral vesicle; fertilization duct short ( Figs. 3D, E , 7 M­O) .

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.

Fig. 7. Female genital organs (1st column ­ epigynum, 2nd ­ internal genitalia, ventral view, and 3rd ­ internal genitalia, dorsal view): Cybaeus geumensis (A­C); C. ilweolensis (D­F); C. jiriensis (G­I); C. jogyensis (J­L); C. odaensis (M­O); C. songniensis (P­R). Scale lines: 0.1mm.