Clade Procellariiformes Fürbringer 1888
Parent taxon: Procellariimorphae according to G. Sangster and G. Mayr 2021
See also Baird 1992, Bourdon et al. 2005, Carroll 1988, del Hoyo et al. 2014, Gadow 1898, Guthrie 1992, Hay 1930, Hope 2002, Howard 1972, Livezey and Zusi 2007, Mayr 2005, Mayr 2011, Mayr 2022, Sepkoski 2002, Slack et al. 2006, Wetmore 1940, Wetmore 1956 and Wetmore 1960
Sister taxon: Sphenisciformes
Subtaxa: Diomedeidae Diomedeoididae Hydrobatidae Hydrotherikornis Kievornis Makahala Marinavidae Oceanitidae Pandiomedeidae Pelecanoidi Pelecanoididae Procellarae Procellariidae Rupelornis Rupelornis definitus Tytthostonychidae