- Trematoda, class Trematoda - parasitic flatworms (including flukes)
--1 is a kind of class
--1 is a member of Platyhelminthes, phylum Platyhelminthes
--1 has members:helminth, parasitic worm; fluke, trematode, trematode worm; cercaria; Fasciolidae, family Fasciolidae; Schistosomatidae, family Schistosomatidae