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N. BROTHERS¹ & G. DAVIS^2
1Department Primary Industries, Water & Environment, GPO Box 44 Hobart 7001 Tasmania, Australia and Consultant Marine Ecology and Technology, 178 South Arm Drive, Wonga Beach Queensland 4873. Email: brothersbone@yahoo.com.au
2222 Hill Street, Bellerive, 7018, Tasmania, Australia.

Two new records of Mytilidae, Aulacomya ater ater (Iredale, 1915) and Mytilus cf. galloprovincialis (Lamarck, 1819), are reported for Macquarie Island. The former is considered to have been a recent arrival at the island, but is apparently not yet established there, which raises issues of management response and the need for a species inventory update to enable appropriate management of alien species in the future. The mode of arrival of Mytilus is uncertain but it is possibly indicative of an already established, but previously unreported, population.

Key words: oceanic dispersal, Mollusca, Bivalvia, Mytilus, Aulacomya

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