Cylindroid, solitary, with mucron, late syzygy and coelomic
habitat of the parasite in an earthworm justify the inclusion of
the present form under the family Monocystidae, subfamily
Monocystinae and genus Monocystis Stein, 1848. Of more
than 70 species belonging to the genus Monocystis Stein,
1848, only 13 have been described from India.