However, as most of them are only roughly dated and intermediate in size between this species and P. antarcticus, they should not be referred to either taxon pending a comprehensive review of the New Zealand material of Palaeeudyptes (which will probably result in recognizing that P. marplesi was a larger progenitor species or subspecies of P. antarcticus).
The species are only roughly dated and intermediate in size between this species and P. antarcticus, so they should not be referred to as either taxon until a comprehensive review of the New Zealand material of Palaeeudyptes is completed (which will likely lead to recognizing that P. marplesi was a larger ancestor or subspecies of P. antarcticus).