Cerithidea

Cerithidea

(ser'i-thid'ē-ă), A genus of marine and brackish water operculate (prosobranch) snails that serve as first intermediate hosts of a number of trematodes. Cerithidea cingulata serves as host for Heterophyes heterophyes in Japan and Southeast Asia; Cerithidea scalariformis induces swimmer's itch in the southeastern U.S. from Florida to Texas.