The ciliated first-stage aquatic embryo of pseudophyllid and other cestodes with aquatic cycles; within the ciliated embryophore is a hooked larva, the hexacanth, which develops in the intermediate host, usually an aquatic crustacean, into the next larval stage, the procercoid.
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References in periodicals archive ?
The larva (coracidium) is surrounded by ciliated cells which enable its active movement in the water after hatching from the egg.
A coracidium (ciliated embryo) is released into the water and is the infective form that can infect a copepod crustacean in the genus Cyclops (first intermediate host).
The coracidium of the cestode Tylocephalum and the migration and late of this parasite in the American oyster, Crassostrea virginica.
Authors while working on the cultured carp in Sanami district Japan (27) discussed the role of temperature on the hatching of eggs and reported that no coracidium formation occurs during winter and spring seasons, thus attributing the lowest incidence in these seasons (2); hence supporting the present investigation.