|Microfilariae of Mansonella perstans (left) and Loa loa (Spirurida: Filariidae)|
The Ascaridida and the Oxyurida, which include worms that infect many mammals (including marine mammals), are sometimes placed in subclass Rhabditia. But that seems as spurious as the erstwhile placement of the Rhigonematida in subclass Tylenchia. The Camallanida and Drilonematida are sometimes included in the Spirurida as suborder and superfamily, respectively.
Some important species
- ToL (2002)