Cerithidea
noun
Cer·i·thid·ea
ˌserəˈthidēə
: 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)
Word History
Etymology
New Latin, probably irregular from Cerithium