 Presently this is considered monotypic by most.However, it was recently established that the supposed "Cretaceous flamingo" Parascaniornis stensioi from the Late Cretaceous of Ivö Island in Sweden was not a flamingo and neither, as suggested by others, a gaviiform (loon) nor a procellariiform, but in fact belongs with "Baptornis".As there is insufficient material for a proper comparison, it is not known whether it is also a junior synonym of "B. advenus" or a second species.