A tool from the archaeological site at Wairau Bar, New Zealand, is identified as an import from the tropical Pacific. The tool was made by working a cutting edge on the apex of a spiral gastropod shell, identified as Acus crenulatus (formerly Terebra crenulata) (family Terebridae). Similar tools have been found in a number of sites in tropical East Polynesia, dating to the same general time period as Wairau Bar. The tool supports the view that the Wairau Bar site was a pioneering settlement close in time to the initial Polynesian arrival in New Zealand.
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Davidson et al. (2011) studied this question.