Home Acknowledgments Conventions Glossary Maps References Links Articles Thumbnails Species list Order Next family	Runcinidae The family Runcinidae includes very small species that lack shells or have small, plate-like shells concealed below the posterior edge of the mantle or embedded in it. They are herbivores but little is known about their biology. One species is known from Hawaii in the genus Runcina. Runcina sp. #1
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