Clades:
Procellariiformes;
Ardeae;
Aves;
Sauropsida;
Animals;
Kingdoms.
Members: x Aphrodroma brevirostris; x Ardenna bulleri; x Bulweria bulwerii; x Calonectris diomedea; x Daption capense; x Fulmarus glacialis; x Halobaena caerulea; x Macronectes giganteus; x Pachyptila belcheri; x Pagodroma nivea; x Pelecanoides garnotii; x Procellaria aequinoctialis; x Pseudobulweria aterrima; x Pterodroma alba; x Puffinus assimilis; x Thalassoica antarctica.