Question: The pheasants, grouse and their allies form which group?
Sentence: The earliest divergence within the Neognathes was that of the Galloanserae, the superorder containing the Anseriformes (ducks, geese, swans and screamers) and the Galliformes (the pheasants, grouse, and their allies, together with the mound builders and the guans and their allies).
Answer in sentence: yes