The Miocene "Aythya" arvernensis is now placed in Mionetta, while "Aythya" chauvirae seems to contain the remains of two species, at least one of which does not seem to be a diving duck.
中新世的"Aythya" arvernensis現已被編入Mionetta中，而"Aythya" chauvirae似乎包含了兩個物種，但最少有一種已肯定不是潛鴨屬。