- Amidostomatidae [familie]
- Ancylostomatidae [familie]
- Angiostrongylidae [familie]
- Chabertiidae [familie]
- Crenosomatidae [familie]
- Dictyocaulidae [familie]
- Filaroididae [familie]
- Heligmonellidae [familie]
- Heligmosomidae [familie]
- Heterorhabditidae [familie]
- Metastrongylidae [familie]
- Molineidae [familie]
- Protostrongylidae [familie]
- Pseudallidae [familie]
- Skrjabingylidae [familie]
- Strongylidae [familie]
- Syngamidae [familie]
- Trichostrongylidae [familie]