Henderson Island, Pitcairn Group.
Belongs to the large species-group centred on P. purpuratus (which see), forming part of the subgroup centred on that same species. Previously thought to be most closely related to †P. mercierii. In past was considered a race of P. purpuratus#R. Monotypic.
Henderson I (mostly interior of island), in Pitcairn Group.
Food and feeding
Status and conservation
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