A class of flatworms that comprises those flukes that are internal parasites. The monogenean flukes are sometimes also placed in this class.
- ‘Coregonus hoyi is heavily parasitized, with common parasites including: Botriochocephalidae, Nematoda, Trematoda, Cestoda, Acanthocephala.’
- ‘The Trematoda, or flukes, are all parasitic, and have complex life cycles specialized for parasitism in animal tissues.’
- ‘Surprisingly, we found it in a highly conserved form also in a human parasite Schistosoma japonicum (Trematoda).’
- ‘The medically important flatworms are further divided into the flukes (Trematoda) and tapeworms (Cestoda).’
Modern Latin (plural), from Greek trēmatōdēs perforated from trēma hole.