Rhabditida Strongylida and see text Rhabditina Subclass Rhabditia is mostly composed of parasitic nematodes (particularly in the Strongylida), though there are some free-living species as well (particularly in the Rhabditida).

In an alternate classification system, they are treated as suborder Rhabditina, with the orders listed here being ranked as infraorders.

On the other hand, the old placement of the Ascaridida in Rhabditia instead of Spiruria seems unwarranted.

The Rhabditida contain a number of families which are probably better placed in the Tylenchia; alternatively, the latter group may entirely be merged with the Rhabditia.

You can help Wikipedia by expanding it.This Rhabditida roundworm-related article is a stub.