There are other extinct birds which have been allied with the Palaeognathae by at least one author , but their affinities are a matter of dispute .
There are other extinct orders which have been allied with the Palaeognathae by at least one author , but their affinities are a matter of dispute : the Ambiornithiformes , the Gansuiformes , the Paleocursornithiformes , the Gobipterygidae .