Diphyllidea

Diphyllidea is a monotypic order of Cestoda (tapeworms).^[1] Members of this order are gut parasites of elasmobranch fishes including rays and sharks.^[2] Disphyllidea infect their host’s spiral intestine. Scolex is the type of tapeworm associated with Disphyllidea, which have a hook-like structure that helps attach to their host’s gut.

Diphyllidea
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Platyhelminthes
Class:	Cestoda
Subclass:	Eucestoda
Order:	Diphyllidea
Families
Echinobothriidae