Myzostomida
Animal
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. Wikipedia
Higher classification: Polychaete
Lower classifications: Myzostoma and Endomyzostomatidae
Scientific name: Myzostomida
Phylum: Annelida