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Microscopic observations of larval Ostrea circumpicta (bivalve: ostreidae) in brood chambers.
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ABSTRACT This study is the first report of the microscopic features of larvae and gonads of Ostrea circumpicta collected in Jeju, Korea. Female oysters brooded larvae at the early veliger stage (115-135 [micro]m) in the infrabranchial chamber. Larvae in this chamber displayed a well-developed velum covered with long and short cilia: the adductor muscle was incompletely developed. The digestive system of the larvae, including the mouth, esophagus, stomach, digestive gland, and intestine, was identifiable in histologic preparations, indicating that the veliger larvae in the brood ...
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