Image of: Umbonium
ADW: 015.rjb1.jpg
Caption
Umbonium
. Commonly called "button shells" because of their size and colors, these primitive mollusks inhabit sandy littoral habitats in the Indo-Pacific. Note the multispiral operculum.
Contributors
Dr. John B. Burch, Ph.D.
(photographer, copyright holder), Mollusk Division, Museum of Zoology, University of Michigan
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