Class Trematoda. There are about 9000 species of trematodes all of which are parasitic. Most parasitize vertebrates. Adaptations for parasitism include suckers and hooks for attachment, glands to produce cyst material and increased reproductive capacity. Sheep liver fluke. Class Trematoda.
Sheep liver fluke (above)
frequency of males
and thus sexual
Gyrodactylus olsoni on the gill filament of longjaw mudsucker, SEM. a - general view
The scolex is equipped with suckers and hooks that enable it to grip onto its host’s intestines.
Tapeworm cysticerci in body cavity of a rabbit