Myzostomida
| Myzostomida | |
|---|---|
| Myzostoma fuscomaculatum on its host the crinoid Tropiometra carinata | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Annelida |
| Class: | Polychaeta |
| Order: | Myzostomida von Graff, 1877 |
The Myzostomida or Myzostomatida are an order of small marine worms, which are parasitic on echinoderms, mostly crinoids. These highly unusual and diverse annelids were first discovered by Friedrich Sigismund Leuckart in 1827.