Cerithidea
noun
Cer·i·thid·ea
| \ ˌserəˈthidēə\
Definition of Cerithidea
: a genus of brackish-water snails (family Cerithiidae) having a long usually dark brown or blackish spiral shell, common on tidal mud flats, and including intermediate hosts of the intestinal fluke (Heterophyses heterophyses)
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