Cybaeus jiriensis, 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 : 574-576

Cybaeus jiriensis n. sp.

mƞƌặHŔ (ṳAE) ( Figs. 2 A­E, 5E, F, 6G­I, 7G­I)

Material examined. Holotype: ♂, mixed forest (35°21′ 21″N, 127°32′03″E, alt. 957 m), 4.8 km northweat of the

Banya Peak in Mt. Jiri, Sannae­myeon, Namweon­si , Jeollanam­do, 30 June 2010, J. C. Lim. Paratype: 4$$, same data as holotype .

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

Diagnosis. The new species is similar to C. songniensis n. sp. in the abdominal pattern, the embolus length of male palp, the interval between the embolic base and the conductor of male palp, the apophysis teeth number and the apophysis shape of male palpal patella, and the vesicle shape of female spermatheca, but can be easily distinguished from the latter by the lengthened cymbium tip of male palp, the epygine, the small size and the adjacent position of the anterior vesicles, and the slightly curved copulatory duct connected with the anterior vesicle of female spermatheca ( Figs. 2 A­E, 5E, F, 7G­I).

Description. Male (holotype). Total length 4.85. Habitus as in Fig. 5F . Carapace yellowish brown, 2.80 long, 2.05 wide; radial grooves and linear fovea distinct. Clypeus height 2 times of diameter of ALE. AER 0.62, PER 0.77; AER and PER retrocurved slightly in dorsal view. AME 0.10, ALE 0.18, PME 0.14, PLE 0.23, AME­AME 0.05, AME­ALE 0.04, PME­PME 0.13, PME­PLE 0.10, AME­PME 0.18, and ALE­PLE 0.04. Median ocular quadrangle, posterior side = height>anterior side (31: 19). Chelicera with three promarginal and eight minute retromarginal teeth. Sternum 1.40 long, 1.55 wide. Labium 0.45 long, 0.50 wide. Leg measurements: I 10.00 (2.60, 1.00, 2.60, 2.45, 1.35), II 8.60 (2.25, 0.90, 2.05, 2.15, 1.25), III 7.40 (1.95, 0.85, 1.50, 1.95, 1.15), IV 9.25 (2.30, 0.85, 2.10, 2.60, 1.40). Palp 3.95 (1.55, 0.65, 0.45, 1.30). Leg I/c 3.57. Fem. I/c 0.93. Tib. I/c 0.93. Met. I/c 0.88. Pat. I+ tib. I/c 1.29. Met. I/tar. I 1.81. Met. IV/tar. IV 1.86. Leg spination pattern: Femora; I, IV d1­1­1, p0­1­1; II d1­1­0, p0­0­1, r0­1­0; III d1­1­1, p0­1­1, r0­1­1. Tibiae; I p1­1, v2­2­2­0; II p1­1­1, v2­2­1; III d1­1, p1­1, r1­1, v2­2­2; IV d1­1, p1­1­1, r0­1­1, v2­1­1. Metatarsi; I p1­ 0­1, r1­0­1, v2­2­0; II p1­1­1­1, r1­1, v2­2­1; III, IV d2­ 2­2, p1­1, r1­1, v2­2­1. Abdomen oval and dark gray, with two pairs of pale dots and three chevrons longitudinally, and 2.15 long, 1.70 wide. Palp ( Figs. 2 A­C, 6G­I): tibia shorter than patella; patella apophysis rather point­ ed with 13 conical teeth; embolus short and slender; interval between embolic base and conductor narrow.

Female (paratype). Total length 4.45. Habitus as in Fig. 5E . Carapace 2.75 long, 1.85 wide. Clypeus height 2 times of diameter of ALE. AER 0.64, PER 0.81. AME 0.12, ALE 0.18, PME 0.16, PLE 0.14, AME­AME 0.05, AME­ALE 0.04, PME­PME 0.13, PME­PLE 0.12, AME­PME 0.17, and ALE­PLE 0.07. Median ocular quadrangle, posterior side>height>anterior side (33: 31: 20). Chelicera with three promarginal and eight minute retromarginal teeth. Sternum 1.25 long, 1.15 wide. Labium 0.40 long, 0.45 wide. Leg measurements: I 7.80 (2.15, 0.95, 1.90, 1.70, 1.10), II 7.15 (2.00, 0.85, 1.65, 1.60, 1.05), III 6.35 (1.80, 0.80, 1.25, 1.55, 0.95), IV 8.10 (2.15, 0.80, 1.85, 2.15, 1.15). Palp 3.15 (1.05, 0.50, 0.60, 1.00). Leg I /c 2.84. Fem. I /c 0.78. Tib. I /c 0.69. Met. I /c 0.62. Pat. I + tib. I/c 1.04. Met. I /tar. I 1.55. Met. IV /tar. IV 1.87. Leg spination pattern: Femora; I d1­1­1, p0­0­2; II, IV d1­1­1, p0­0­1; III d1­1­1, p0­1­1, r0­1­1. Tibiae; I p1­0, v2­2­2­1; II p1­1­1, v2­2­1; III d1­1, p1­1, r1­1, v2­2; IV d1­1, p1­1­1, r0­1­1, v1­1­2. Metatarsi; I p1­ 1, r1­1, v2­2­0; II p1­1­1­2, r1­1, v2­2­0; III d2­2­2, p1­ 1, r1­1, v2­2­1; IV d2­2­2, p1­1, r0­1, v2­2­1. Abdomen 2.00 long, 1.45 wide. Epigynum: atrium wide, with a pair of copulatory openings. Internal genitalia: spermatheca with an anterior small pear­shaped vesicle and a posterior gourd­like vesicle; slightly curved copulatory duct connected with anterior vesicle dorsally; fertilization duct short ( Figs. 2D, E, 7 G­I) .

A B D C E G F H I J

Habitat. Mixed forest.

World Distribution. Korea (Jeollanam­do).

Figures

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.