Cybaeus geumensis, 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 : 571-572

Cybaeus geumensis n. sp.

ōüƌặHŔ (ṳAE) ( Figs. 1 A­E, 5A, B, 6A­C, 7A­C)

Material examined. Holotype: ♂, mixed forest (34°44′ 59″N, 127°59′03″E, alt. 428 m), 300 m south­southeast of Bori Hermitage in Mt. Geum, Sangju­myeon, Namhaegun , Gyeongsangnam­do, 20 July 2013, B. K. Seo . Paratype: 13♂♂, 3$$, same data as holotype ; 2♂♂, 7$$, mixed forest (34°44′53″N, 127°59′07″E, alt. 343 m), 550 m south­southeast of Bori Hermitage, other data same as holotype .

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

Diagnosis. The new species is similar to C. jogyensis 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 round apophysis of male palpal patella, and the size and shape of the vesicles of female spermatheca, but can be distinguished from the latter by the body length, the teeth number of on the apophysis of male palpal patella, the epigyne, and the coiled copulatory duct connected ventrally with the anterior vesicle of female spermatheca ( Figs. 1 A­E, 5A, B, 7A­C).

Description. Male (holotype). Total length 9.70. Habitus as in Fig. 5B . Carapace reddish brown, 5.60 long, 4.10 wide; radial grooves and linear fovea distinct. Clypeus height about 3 times of diameter of ALE. AER 1.17, PER 1.46; AER and PER retrocurved slightly in dorsal view. AME 0.17, ALE 0.26, PME 0.23, PLE 0.22, AME­AME 0.09, AME­ALE 0.13, PME­PME 0.29, PME­PLE 0.22, AME­PME 0.27, and ALE­PLE 0.08. Median ocular quadrangle, posterior side>height>anterior side (57: 49: 34). Chelicera with three promarginal and nine minute retromarginal teeth. Sternum 2.60 long, 2.30 wide. Labium 0.90 long, 0.90 wide. Leg measurements: I 19.30 (5.00, 1.90, 5.20, 4.60, 2.60), II 16.50 (4.40, 1.70, 4.10, 4.00, 2.30), III 13.30 (3.70, 1.60, 2.70, 3.50, 1.80), IV 16.30 (4.20, 1.60, 3.70, 4.60, 2.20). Palp 6.00 (2.40, 0.80, 0.70, 2.10). Leg I/c 3.45. Fem. I/c 0.89. Tib. I/c 0.93. Met. I/c 0.82. Pat. I + tib. I/c 1.27. Met. I/tar. I 1.77. Met. IV/tar. IV 2.09. Leg spination pattern: Femora; I d1­1, p0­0­0­1; II d1­1­1, p0­0­0­1­1, r0­1­0; III d1­1­1, p0­1­1, r0­1­1; IV d1­1­1, p0­0­0­1, r0­0­0­1. Tibiae; I, II d1­1, p1­1­1­1, v2­2­1­0­2; III d1­1, p1­1­1, r1­1, v2­ 2­2; IV d1­1, p1­1­1, r0­1­1, v2­1­2. Metatarsi; I p1­1­ 1, r1­1­1, v2­0­0­0; II p1­1­1­0­2, r0­1­0­1, v2­2­1; III p1­1­1­2, r1­1­1­2, v2­2­1; IV p1­1­1­2, r1­1­2, v2­2­1. Abdomen oval and dark, with two pairs of pale dots and four chevrons longitudinally, and 4.60 long, 3.60 wide. Palp ( Figs. 1 A­C, 6A­C): tibia slightly shorter than patella; patella apophysis round with 49 conical teeth; embolus long and slender, its tip reaches end of conductor; interval between embolic base and conductor wide.

Female (paratype). Total length 9.00. Habitus as in Fig. 5A . Carapace 4.80 long, 3.20 wide. Clypeus height 2.3 times of diameter of ALE. AER 1.01 , PER 1.24 . AME 0.16, ALE 0.22, PME 0.21, PLE 0.22, AME­AME 0.10, AME­ALE 0.08, PME­PME 0.26, PME­PLE 0.16, AME­PME 0.23, and ALE­PLE 0.07. Median ocular quadrangle, posterior side>height>anterior side (51: 43: 31). Chelicera with three promarginal and eight minute retromarginal teeth. Sternum 2.10 long, 1.90 wide. Labium 0.80 long, 0.80 wide. Leg measurements: I 13.30 (3.70, 1.60, 3.30, 3.00, 1.70), II 12.30 (3.50, 1.50, 2.90, 2.80, 1.60), III 10.40 (3.00, 1.30, 2.10, 2.60, 1.40), IV 13.40 (3.60, 1.40, 3.00, 3.60, 1.80). Palp 5.70 (1.90, 0.80, 1.10, 1.90). Leg I /c 2.77. Fem. I /c 0.77. Tib. I /c 0.69. Met. I /c 0.63. Pat. I + tib. I/c 1.02. Met. I /tar. I 1.76. Met. IV /tar. IV 2.00. Leg spination pattern: Femora; I d1­1­ 1, p0­0­0­1­1, r0­1­0; II d1­1­1, p0­1­1­1, r0­1­0; III d1­ 1­1, p0­1­1, r0­1­1; IV d1­1­1, p0­1­0, r0­0­1. Tibiae; I, II d1­1, p1­1­1, v2­2­1­2; III d1­1, p1­1­1, r1­1, v2­2­0­ 2; IV d1­1, p1­1­0­1, r0­1­1, v2­1­0­2. Metatarsi; I p1­1, r0­1­1, v2­2­1; II p1­1­1­2, r0­1­1, v2­2­1; III p1­1­1­2, r1­1­1­2, v2­2­1; IV p1­1­1­2, r1­1­2, v2­2­1. Abdomen oval and dark gray, and 5.10 long, 3.70 wide. Epigynum: atrium wide, with a pair of copulatory openings. Internal genitalia: spermatheca with an anterior small pear­like vesicle and a posterior gourd­like vesicle; coiled copulatory duct connected with anterior vesicle ventrally; fertilization duct short ( Figs. 1D, E , 7 A­C) .

Habitat. Mixed forest.

World Distribution. Korea (Gyeongsangnam­do).

Figures

Fig. 1. Cybaeus geumensis n. sp. (A­E) and Cybaeus ilweolensis n. sp. (F­J): A, F ­ male left palp, ventral view; B, G ­ male left palp, tibia and patella, dorsal view; C, H­ditto, retrolateral view; D, I­ female internal genitalia, ventral view; E, J­ 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.