Strongylidae Baird 1853
円虫科
- Bourgelatia Railliet, Henry & Bauche 1919
- Chabertia Railliet & Henry 1909
- Craterostomum Boulenger 1920
- Cyathostomum Molin 1861
- Cylicocyclus Ihle 1922
- Cylicodontophorus Ihle 1922
- Cylicostephanus Ihle 1922
- Gyalocephalus Looss 1900
- Oesophagodontus Bailliet & Henry 1902
- Oesophagostomum Molin 1861
- Poteriostomum Quiel 1919
- Stephanurus Diesing 1839
- Strongylus Müller 1780
- Triodontophorus Looss 1902