NEMATODES ASSOCIATED WITH FOREST TREES IN KOREA .2. .3. NEW AND ONE DESCRIBED SPECIES OF GEOCENAMUS WITH A NOTE ON THE EN-FACE VIEW IN THE GENUS

Geocenamus boghiae sp. n. and G. myungsugae sp. n. are species with a tessellated cuticle. G. boghiae is unusual because of the long stylet (45-54 mum), the absence of a bursa in the male and a conical tail wit h a non-annulated, hyaline tip. G. myungsugae has an offset button-lik e head and a short subcylindrical tail with annulated tip. G. sobaeken sis sp. n. has a long conical tail, unequally spaced lateral lines and a large projecting epiptygma. G. adakensis (Bernard, 1984) was found for the second time since its description. The comparative study of SE M en face patterns revealed three different types.