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出典:『Wikipedia』 (2011/03/26 16:55 UTC 版)

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Bucephalus polymorphus is a species of the Bucephalidae family of Digenea, a subclass of Trematodes within the phylum Platyhelminthes. It is characterized by having a mouth near middle of body along with a sac-like gut. The adults occur in the centre of the ventral surface. The adults occur in the gut of marine and fresh-water fish. The metacercariae encyst in smaller fish, sometimes in the nervous system. These parasitic flatworms are dorso-ventrally flattened animals characterized by a bilaterally symmetrical body enclosed within a syncytial tegument. They have a distal, anucleate later (distal cytoplasm). The distal cytoplasm contains vesicular inclusions that are Golgi derived. The adults of these acoelomate worms are common in the digestive tract, but are also found in other organs of vertebrates. The adult parasite attaches via a characteristic anterior adhesive organ with tentacles. Bucephalus are native to North American fresh waters that parasitize freshwater bivalves.