Gephyrea
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Ge·phyr·ea | \ jəˈfirēə, ˌjefəˈrēə \
Definition of Gephyrea
: a probably artificial group of marine worms variously regarded as a phylum or as a class of Annelida, including Echiuroidea, Sipunculoidea, and Priapuloidea, and comprising worms that are unsegmented as adults and have coeloms and separate sexes and typically a single pair of nephridia
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