Falcileptoneta geumsanensis, Seo, 2016

Seo, Bo Keun, 2016, Four new species of the genus Falcileptoneta (Araneae, Leptonetidae) from Korea, Journal of Species Research 5 (3), pp. 590-595 : 591-4

Falcileptoneta geumsanensis n. sp.

ōüḦ나ffiĄŔ (ṳAE) ( Fig. 2 A­I)

Material examined. Holotype: ♂, mixed forest (34°44′ 27″N, 127°59′06″E, alt. 142 m), 1.4 km south of the summit of Mt. Geum, Sangju­myeon, Namhae­gun , Gyeongsangnam­do, 20 April 2013, B. K. Seo . Paratype: 13 ♂♂, 11$$, same data as holotype ; 2♂♂, 20 July 2013, other data same as holotype ; 3♂♂, 2$$, mixed forest (34°47′15″N, 127°57′07″E, alt. 103 m), 6.4 km westnorthwest of the summit of Mt. Geum, Idong­myeon, Namhae­gun , Gyeongsangnam­do, 19 April 2013, B. K. Seo ; 2♂♂, 2$$, mixed forest (34°43′18″N, 127°57′44″ E, alt. 102 m), 3.9 km.

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B H C D

E

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G F

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

Diagnosis. The male palp of F. geumsanensis n. sp. is very similar to that of F. digitalis Seo, 2015 in the shape of tarsus, the tibial dorsal spurs, three retrolateral apophyses on the distal end of the tibia, and the shape of retrolateral sclerite of the bulb, but can be easily distinguished from the latter by the tarsus without a ventral process and a proximal retrolateral spur, the shape of beak­like dorsal apophysis among three retrolateral tibial ones, the sickle­like embolus tip, the narrow undulating membrane at the anterodorsal embolus, and the endite bulged out medially ( Fig. 2 E­H).

Description. Male (holotype). Total length 1.58. Habitus as in Fig. 2A. Carapace yellowish brown and 0.74 long, 0.62 wide; fovea linear, distinct; radial furrow and margin of thorax covered with brown spots. Clypeus height 2.2 times of diameter of ALE. AER 0.10, PER 0.13. ALE 0.06, PME 0.05, PLE 0.05, ALE­PME 0.08, PLE­PME 0.03. Chelicera with eight promarginal teeth. Sternum 0.48 long, 0.36 wide. Labium 0.10 long, 0.12 wide. Endite bulged out medially, and longer than wide ( Fig. 2B). Leg measurements: I 4.12 (1.10, 0.24, 1.18, 0.92, 0.68), II 3.34 (0.92, 0.24, 0.88, 0.70, 0.60), III 0.92 (0.80, 0.20, 0.74, 0.66, 0.52), IV 4.10 (1.10, 0.24, 1.20, 0.92, 0.64). Palp 1.28 (0.54, 0.20, 0.26, 0.28). Leg I/c 5.57. Fem. I/c 1.49. Tib I/c 1.59. Met I/c 1.24. Pat. I+ tib. I/c 1.92. Met. I/tar. I 1.35. Met. IV/tar. IV 1.44. Leg spination pattern:

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B C D

H E G F

Femora; I p0­0­1. Tibiae; I p0­1­1, r0­1­1, v1­0; II v1­0; III d0­1, p0­0­1, r1­1; IV d1­0, p1­1, r0­0­1. Metatarsi; I v1­1­1; II p0­1­0, v0­0; III p1­0, v0­1­0; IV p0­1­0. Abdomen yellowish brown mottled with brown spots, oval, and 0.74 long, 0.56 wide. Palp ( Fig. 2 C­H): femur without strong spine; tibia with three retrolateral apophyses on distal end, ventral one spur­like, middle one leaf­like and dorsal one beak­like, and with two dorsal spurs and one dorsoretrolateral one; tarsus unbranched, with a transverse depression. Palpal bulb with an embolus and three sclerites: tip of embolus sickle­like, anterodorsal embolus with narrow undulating membrane; prolateral sclerite narrow leaf­like, with serrated tip; median sclerite shoehorn­like; retrolateral sclerite transparent and membranous.

Female (paratype). Total length 1.66. Carapace 0.68 long, 0.60 wide. Clypeus height 2 times of diameter of ALE. AER 0.12, PER 0.13. ALE 0.07, PME 0.05, PLE 0.05, ALE­PME 0.07, PLE­PME 0.03. Chelicera with eight promarginal teeth. Sternum 0.49 long, 0.35 wide. Labium 0.10 long, 0.14 wide. Leg measurements: I 4.14 (1.06, 0.22, 1.18, 0.90, 0.78), II 3.26 (0.90, 0.22, 0.88, 0.68, 0.58) , III 2.88 (0.80, 0.20, 0.74, 0.66, 0.48) , IV 4.04 (1.10, 0.22, 1.20, 0.90, 0.62) . Palp 1.32 (0.42, 0.16, 0.32, 0.42). Leg I/c 6.09. Fem. I/c 1.56. Tib I/c 1.74. Met I/c 1.32. Pat. I+ tib. I/c 2.06. Met. I/tar. I 1.15. Met. IV/tar. IV 1.45 . Leg spination pattern: Femora; I p1­0. Tibiae; I p0­0­0­1, r0­1­1­1, v1­0; II v1­0; III d0­1, p0­0­1, r1­ 1; IV d1­0­0, p0­0­0­1. Metatarsi; I v1­1­1; II, IV p0­1­ 0, v0­1­0; III p0­1­0, v0­1­0; IV p0­1­0. Abdomen oval, 0.98 long, 0.80 wide. Internal genitalia; spermatheca pear­shaped, genital duct short and loosely coiled ( Fig. 2I).

Habitat. Mixed forest.

World Distribution. Korea (Gyeongsangnam­do).