Superfamily Suloidea Hay 1930
Alternative spellings: Sulides, Suloidae
Full reference: O. P. Hay. 1930. Second Bibliography and Catalogue of the Fossil Vertebrata of North America 390(II):1-1074
Parent taxon: Sulida according to B. C. Livezey and R. L. Zusi 2007
See also Bourdon et al. 2005, Hay 1930, Lambrecht 1933, Mayr 2002, Mayr 2005, Wetmore 1940, Wetmore 1956 and Wetmore 1960
Sister taxon: Phalacrocoracoidea
Subtaxa: Elopterygidae
Type: Sula
Distribution: found only at Hordle Cliff (generic, non-specific locality) (Eocene of the United Kingdom)