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Trematoda
Miracidium, sporocyst, redia, cercaria, metacercaria
Schistosome flukes
Schistosomule
Cestoda
Oncosphere and cysticerous
Unionidae
Glochidium
Nemertea
Pilidium
Cycliophora
Pandora and chordoid
Dicyemida
Vermiform and infusiform
Monogea
Oncomiracidium
Acanthocephala
Cystacanth
Mollusca
Trocophore and veliger