Cybaeus songniensis, 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 : 582

Cybaeus songniensis n. sp.

ẆƞƌặHŔ (ṳAE) ( Figs. 4 A­E, 5L, M, 6S­U, 7P­R)

Material examined. Holotype: ♂, mixed forest (36°29′ 35″N, 127°49′36″E, alt. 347 m), 5.3 km south of Beopju Temple in Mt. Songni, Songnisan­myeon, Boeun­gun , Chungcheongbuk­do, 22 August 2011, T. B. Ryu . Paratype: 1$, same data as holotype.

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

Diagnosis. The new species is similar to C. jiriensis 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 normal cymbium tip of male palp, the epygine, the small size and the separated position of the anterior vesicles, and the curved copulatory duct connected with the anterior vesicle of female spermatheca ( Figs. 4 A­E, 5L, M, 7P­R).

Description. Male (holotype). Total length 4.35. Habitus as in Fig. 5M . Carapace brown, 2.77 long, 2.08 wide; radial grooves and linear fovea distinct. Clypeus height 3.4 times of diameter of ALE. AER 0.60, PER 0.75; AER and PER retrocurved slightly in dorsal view. AME 0.13, ALE 0.17, PME 0.14, PLE 0.16, AME­AME 0.04, AME­ALE 0.04, PME­PME 0.13, PME­PLE 0.10, AME­PME 0.14, and ALE­PLE 0.05. Median ocular quadrangle, posterior side>height>anterior side (30: 27: 17). Chelicera with three promarginal and eight minute retromarginal teeth. Sternum 1.32 long, 1.26 wide. Labium 0.38 long, 0.44 wide. Leg measurements: I 9.96 (2.58, 0.95, 2.65, 2.33, 1.45), II 8.25 (2.27, 0.88, 1.95, 1.89, 1.26), III 6.80 (1.89, 0.76, 1.32, 1.70, 1.13), IV 8.83 (2.33, 0.76, 2.02, 2.46, 1.26). Palp 3.08 (1.13, 0.44, 0.38, 1.13). Leg I/c 3.60. Fem. I/c 0.93. Tib. I/c 0.96. Met. I/c 0.83. Pat. I+ tib. I/c 1.30. Met. I/tar. I 1.61. Met. IV/tar. IV 1.95. Leg spination pattern: Femora; I d1­1­0, p0­0­1; II d1­1, p0­0­0­1; III d1­1­1, p0­1­1, r0­1­1; IV d1­1­0, p0­0­0­1, r0­0­0­1. Tibiae; I d0­0­0­1, p1­1­1, v2­2­1; II d1­0­1, p1­1­1, v2­2­1; III, IV d1­1, p1­1­1, r1­1, v2­2­ 2. Metatarsi; I p1­1, r0­0­1, v2­2­0; II p1­1­0­2, r0­0­0­ 1, v2­2­1; III p1­1­1­2, r1­1­1­2, v2­2­1; IV p1­2­2, r1­ 1­2, v1­1­2­1. Abdomen oval and dark, with two pairs of pale dots and four chevrons longitudinally, and 1.89 long, 1.51 wide. Palp ( Figs. 4 A­C, 6S­U): tibia shorter than patella; patella apophysis rather pointed with 9 conical teeth; embolus short and slender; interval between embolic base and conductor narrow.

Female (paratype). Total length 4.98. Habitus as in Fig. 5L . Carapace 2.84 long, 1.95 wide. Clypeus height 2.9 times of diameter of ALE. AER 0.61, PER 0.83. AME 0.09, ALE 0.17, PME 0.14, PLE 0.17, AME­AME 0.07, AME­ALE 0.04, PME­PME 0.14, PME­PLE 0.12, AME­PME 0.17, and ALE­PLE 0.04. Median ocular quadrangle, posterior side>height>anterior side (34: 30: 18). Chelicera with three promarginal and eight minute retromarginal teeth. Sternum 1.32 long, 1.26 wide. Labium 0.38 long, 0.44 wide. Leg measurements: I 7.63 (2.21, 0.88, 1.83, 1.64, 1.07), II 7.00 (2.08, 0.82, 1.58, 1.51, 1.01), III 6.25 (1.83, 0.76, 1.20, 1.51, 0.95), IV 8.01 (2.21, 0.76, 1.83, 2.08, 1.13). Palp 3.15 (1.01, 0.50, 0.57, 1.07). Leg I /c 2.69. Fem. I /c 0.78. Tib. I /c 0.64. Met. I /c 0.58. Pat. I + tib. I/c 0.95. Met. I /tar. I 1.53. Met. IV /tar. IV 1.84. Leg spination pattern: Femora; I d1­1, p0­0­1; II d1­1, p0­0­1, r0­1­0; III d1­1­1, p0­1­1, r0­1­1; IV d1­ 1­1, r0­0­1. Tibiae; I d1­1, p1­1­1, r0­0­1, v2­2­1­0; II d1­1, p1­1­1, v2­2­1­1; III d1­1, p1­1, r1­1, v2­2­2; IV d1­1, p1­1­1, r0­1­1, v1­1­2. Metatarsi; I p1­1, r1­1, v2­ 2­0; II p1­1­2, r1­1, v2­2­1; III p1­1­1­2, r1­1­1­2, v2­ 2­1; IV p1­1­1­0­2, r1­1­2, v2­2­1. Abdomen dark gray, 2.58 long, 1.83 wide. Epigynum: atrium wide, with a pair of copulatory openings. Internal genitalia: spermatheca with an anterior medium­sized pear­shaped vesicle and a posterior gourd­like vesicle; curved copulatory duct connected with anterior vesicle dorsally; fertilization duct short ( Figs. 4D, E , 7 P­R) .

Habitat. Mixed forest.

World Distribution. Korea (Chungcheongbuk­do).

Figures

Fig. 4. Cybaeus songniensis n. sp.(A­E): A­ male left palp, ventral view; B ­male left palp, tibia and patella, dorsal view; C ­ditto, 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.