Trichocephalida
| Trichocephalida | |
|---|---|
| Trichosomoides crassicauda, young female with male in vagina, drawing in Hall, 1916 | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Nematoda | 
| Class: | Enoplea | 
| Subclass: | Dorylaimia | 
| Order: | Trichocephalida | 
| Families | |
| Anatrichosomatidae Yamaguti, 1961 | |
| Synonyms | |
| Trichinellida | |
The Trichocephalida (Trichinellida or Trichurida in other classifications) is an order of parasitic nematodes.