A New Record of the Polychaete Boccardia proboscidea (Family Spionidae), Imported to Hawai'i with Oysters
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2000-01
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University of Hawai'i Press
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Abstract
The spionid polychaete Boccardia proboscidea Hartman, 1940
was introduced to an oyster culture farm at Keahole, Hawai'i, with a shipment
of Ostrea edulis from Maine. Oysters were heavily infested with adult worms,
and burrows contained egg capsules with late-stage larvae. Diagnostic morphological
features match the species description based on California material,
except that the Hawai'i specimens are smaller. This genus differs from other
oyster-associated spionids, Polydora nuchalis and P. websteri, in having blunt,
bristle-tip setae on the fifth setiger. Boccardia proboscidea forms shallow, burrows
nestled under shell lamina and so differs from P. websteri, a true carbonate
borer, and P. nuchalis, which builds tubes of sediment in ponds and ditches
used for penaeid shrimp culture. Boccardia proboscidea has a pan-Pacific distribution
including the west coast of North America, Japan, and southeastern
Australia. This distribution is attributed in part to the production of early and
late larval stages that are widely dispersed by ocean currents.
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Citation
Bailey-Brock JH. 2000. A new record of the polychaete Boccardia proboscidea (family Spionidae), imported to Hawai'i with oysters. Pac Sci 54(1): 27-30.
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