1. One of two subgroups of Nematoda used in some classification systems, comprises worms having typically papillose sensory organs, phasmids, lateral cervical papillae, and simple lateral sensory depressions at the anterior end which resemble pores (Phasmidia)
   - class Phasmidia

Type of: class

Part of: Aschelminthes, Nematoda, phylum Aschelminthes, phylum Nematoda