抄録
Trophonema asoense sp. n. was found in rhizosphere of Scirpus Wichurai f. concolor on Mt. Aso, Kumamoto, Japan. This species was similar to T. arenarium (RASKI, 1956) but distinguished from it by smaller c-value of the female, shorter gubernaculum and spicules of the male, and shorter body of the second-stage larva. T. okamotoi sp. n. was collected from roots and soilaround roots of Lespedeza bicolor var. japonica and Indigofera pseudo-tinctoria in Ibaraki, Japan. This differed from other species of this genus by a thick tail with roundly pointed terminus. Trophonema was placed in subfamily Tylenchulinae. Diagnosis of this genus and key to species were given.
