| Strongylidae | |
|---|---|
 | |
| Strongylus vulgaris | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Nematoda |
| Class: | Chromadorea |
| Order: | Rhabditida |
| Superfamily: | Strongyloidea |
| Family: | Strongylidae |
| Subfamilies | |
Strongyles (from Greek strongulos 'round'), or alternatively, strongyls, are nematode worms of the family Strongylidae, order Strongylida. They are often parasitic in the gastrointestinal tract of mammals, especially grazers such as sheep, cattle, and horses.
