What are Trematoda? In which kingdom they lie? And what are their characteristics?
Trematoda
Kingdom: Animalia
Phylum : Platyhelminthes
These are parasitic flatworms. Internal parasites of mollusks and vertebrates.
Complex life cycle with normally two hosts. They sexually reproduce in the primary host and the secondary host is for dissemination
They have oral suckers and are sometimes supplemented by hooks to facilitate attachment