Classification
Nematoda [filum]Secernentea [klas]
Klas Secernentea contains the following taxa:
Aphelenchida [orde]
Ascaridida [orde]
Oxyurida [orde]
Rhabditida [orde]
Spirurida [orde]
Strongylida [orde]
Tylenchida [orde]