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Maritrema subdolum
''Maritrema subdolum'' is a species of parasitic fluke found in the Wadden Sea. It is related to the New Zealand species ''Maritrema novaezealandensis'', and like its New Zealand relative, ''Maritrema subdolum'' infects local amphipods, in this case, ''Corophium volutator'' and ''Corophium arenarium''. The cercariae of ''M. subdolum'' emerge from the first intermediate host, a gastropod of the genus ''Hydrobia'' for example, and seek out the next host, a crustacean. There the cercariae develop into metacercariae and form metacercarial cysts of different sizes.
== Morphology ==
''Maritrema subdolum'' has 2 layers: an inner transparent and an outer light-refractory layer. The latter encloses either the entire body or only the anterior end. It lies in a pouch formed by an invagination of the tegument of the oral sucker and its posterior end is surrounded in the syncytial layer at the base of the pouch in close contact with the basal membrane. The anterior end is limited only by an external plasmatic membrane. The cercarial body is a strongly developed tegumental spine.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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