First record Acrobeles ciliatus (Rhabditida) and Plectus parietinus (Plectida) from South Korea

During the nematode survey in Korea in 2015, two unrecorded species of nematodes belonging to the genus of Acrobeles and Plectus were found from soybean field and paddy field, Miryangsi, Gyeongsangnamdo, Korea, respectively. Acrobeles is readily recognized by the fun­ nel shaped stoma and the complex, vine­ shaped labial attachment. Identification of Acrobeles species is usually based on measurement of female, head shape, three la­ bial probolae, and tines. Plectus is easily recognised by having large papillae and easily visible amphid on head. P. antarcticus, P. cirratus subsp. parietinus, P. fusiformis, P. hawaiiensis, P. intermedius, P. naticochensis, P. ornatus, P. parietinus subsp. australis, P. patagonicus, P. pusteri, and P. velox is synonym of P. parietinus (Bastian, 1865).