Cestodaria

Cestodaria
Adults of Gigantolina elongata in body cavity of freshwater turtle.
Scientific classification
Kingdom:	Animalia
Phylum:	Platyhelminthes
Class:	Cestoda
Subclass:	Cestodaria

Cestodaria is one of two subclasses of the class Cestoda. The Cestodaria subclass is made up of Amphilinidea and Gyrocotylidea. The larvae have ten hooks on posterior end.

...
Wikipedia