Two Gnaphosid Spiders ( Araneae : Gnaphosidae ) New to Korean Spider Fauna

Drassyllus yaginumai Kamura, 1987 and Zelotes tortuosus Kamura, 1987 belonging to Gnaphosidae were captured by pitfall trap in maize and soybean fields during the survey of arthropod fauna of agricultural ecosystem in Korea. Present work describes these 2 species with illustrations of taxonomic characters.


Introduction
Gnaphosid spider fauna of Korea comprises 48 species in 20 genera to date [1].Drassyllus yaginumai Kamura, 1987 and Zelotes tortuosus Kamura, 1987 belonging to Gnaphosidae are known to be founded only in Japan.These species are medium-sized hunting spiders and captured by pitfall trap in maize and soybean fields during the intensive survey of arthropod fauna of agricultural ecosystem in Korea.Present work describes these 2 species with illustrations of taxonomic characters.

Material and Method
The external morphology of D. yaginumai and Z. tortuosus was examined and illustrated taxonomic characters using a stereoscopic dissecting microscope.Measurements were made with an ocular micrometer and are recorded in millimeters.Leg measurements are given as "leg number, total length (femur, patella, tibia, metatarsus, and tarsus)".Pedipalp measurements are listed as "total length (femur, patella, tibia, tarsus)".The following ab-breviations are used in the description: AME, anterior median eye; ALE, anterior lateral eye; PME, posterior median eye; PLE, posterior lateral eye; MEs, median eyes; Les, lateral eyes; AER, anterior eye row; PER, posterior eye row; MOQ, median ocular quadrangle.The specimens studied are lodged in the deposited in National Institute of Biological Resources (NIBR) of the ministry of Environment, Korea.
Ecological remarks.This species inhabits in the maize fields and is collected by pitfall trap.Distribution.Korea (newly recorded), Japan.
Genus Zelotes Gistel, 1848 [5] Carapace oval covered with fine hairs; narrowed in front.Anterior eye row slightly procurved, posterior row straight in front.Chelicerae with black hairs on prolateral side; promargin with 3 -4 teeth and one row of bristles, retromargin with 1 -4 denticles.Legs relatively long; tibiae and metatarsi III and IV usually with ventral spines; metatarsi with scopulae.Abdomen long oval; anteriodorsallyscutum in male.Male palp with retrolateraltibialapophysis; usually with terminal apophysis and median apophysis.Female epigynum usually with distinct groove-like anterior and lateral margins.
Ecological remarks.This species inhabits in the soybean fields and is collected by pitfall trap.Distribution.Korea (newly recorded), Japan.