Gastropod opercula. An operculum is a retractable calcareous plate found on the opening of a gastropod shell. It is attached dorsally to the gastropod's foot and serves as a protection against predators and drought. In several regions certain types of opercula are ground and used as incense material. These opercula are from the South China Sea, north east Borneo.
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Creative#:
TOP03230989
Source:
達志影像
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RM
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