- Anguinidae [familie]
- Criconematidae [familie]
- Ecphyadophoridae [familie]
- Hemicycliophoridae [familie]
- Heteroderidae [familie]
- Hoplolaimidae [familie]
- Iotonchiidae [familie]
- Meloidogynidae [familie]
- Neotylenchidae [familie]
- Paratylenchidae [familie]
- Pratylenchidae [familie]
- Psilenchidae [familie]
- Rotylenchulidae [familie]
- Sphaeronematidae [familie]
- Telotylenchidae [familie]
- Tylenchidae [familie]
- Tylodoridae [familie]