Leproneta naejangsanensis, Kim & Yoo & Lee, 2016

Kim, Seung Tae, Yoo, Jung Sun & Lee, Sue Yeon, 2016, Two new species of the genus Leptoneta Simon, 1872 (Araneae: Leptonetidae) from Korea, Journal of Species Research 5 (3), pp. 596-600 : 4-5

Leproneta naejangsanensis sp. nov.

내ĝüḦ나ffiHŔ (ṳAE) ( Fig. 2 A­H)

Holotype. 1 male from Mt. Naejangsan , Jeongeup­si, Jollabuk­do, Korea, (04 June 2013, ST Kim and SY Lee).

Etymology. The specific name refers to the type locality.

Diagnosis. Present new species is similar to Letoneta coreana Paik, Yaginuma, and Namkung, 1969 in general appearance, but can be distinguished by the shape and arrangement of cheliceral teeth, the shape of sternum, and the shape of tibial apophysis, shape of embolus, conductor and lamina of male palpal bulb.

Measurements (in mm). Body length 1.96, AER 0.10, PER 0.13, ALE 0.05, PME 0.06, PLE 0.05, Carapace 0.73 × 0.67, Chelicera 0.30 × 0.13, Endite 0.21 × 0.14, Labium 0.06 × 0.10, Sternum 0.54 × 0.49, Abdomen 1.12× 0.85. Legs: I, 8.79 (1.47, 3.66, 2.17, 1.49); II, 6.83 (1.15, 2.60, 1.63, 1.45); III, 4.83 (0.95, 1.95, 0.80, 1.13); IV 7.61 (1.38, 3.15, 1.78, 1.30). Palp 0.94 (0.45, 0.25, 0.24).

Description. Male: Carapace blackish brown, ovoid, longer than wide; thoracic region dark blackish brown, rimmed; cervical furrow and radial furrow dark blackish brown and distinct, fovea reddish brown, spiniform; clypeus gently elevated ( Fig. 2A ). Six eyes well developed protruding from the carapace surface; ALE and PLE closely spaced in semicircular pattern; PLE separated from each other and from PME by 0.11 and 0.69 times their diameter, respectively; PME separated from each other by 1.38 times their diameter; all eyes ringed with a narrow black band; axes of PLE converge posteriorly; PME contiguous and parallel; PER longer than AER( Fig. 2B, C ). Chelicerae blackish brown, longer than wide, weakly developed; darker anteriorly, lighter posteriorly; promargin with 9 teeth ( Fig. 2D ). Endite pale blackish brown; concaved medially; margin dark blackish brown; covered sparsely with dark blackish brown long hairs. Labium pale blackish brown; slightly concaved anteromedially; margin dark blackish brown. Sternum dull blackish brown and mottled, shield­shaped, longer than wide, convex; covered sparsely with several blackish brown long hairs; some blackish brown markings visible ( Fig. 2E ). Legs pale blackish brown; slender and weakly developed; metatarsi and tarsi fairly weak and flexible; covered densely with transparent and blackish brown hairs and spines; no particular pattern; leg formula 1­4­ 2­3. Abdomen pale and dull blackish brown, ovoid, longer than wide; both sides fairly wrinkled; covered sparsely with dark blackish brown hairs; no particular dorsal pattern ( Fig. 2A ). Spinnerets very tiny, pale and dull blackish brown.

Palp with strongly developed long and pointed apophysis along with twisted tibial apophysis ( Fig. 2I ); cymbium covered densely with long and thick spines; embolus short, beak shaped; conductor broad; median apophysis with blunt tip long and slim, needle shaped; lamina broad with truncated tip ( Fig. 2 F­H).

Distribution. Korea (Mt. Naejangsan, Jeongeup­si, Jollabuk­do: 35°27′53″N, 126°50′16″E, 204 m altitude).

Remarks. This species was collected with pitfall traps in the forest of mountain.

Figures

Fig. 2. Leproneta naejangsanensis sp. nov. A. body; B. eye area, dorsal view; C. eye area, lateral view; D. chelicera; E. Sternum; F. male palp, prolateral view; G. ditto, retrolateral view; H. ditto, dorsal view; I. tibial apophysis of palpal tibia. Em, embolus; Co, conductor; Me, Median apophysis; La, Lamina. Scale bars; A. 1.0mm, B, C. 0.1 mm, D. 0.3 mm, E. 0.5 mm, G, H. 0.2 mm, I. 0.05 mm.