After Olson, 1985, Ericson, 1995, Feduccia, 1996, and Mayr & Smith, 2012, with Recent species from Peterson, 2002-2004, and Finnish vernacular names from Lokki, Jšnnes & Nikander, 1992

<==o Procellariiformes Fürbringer, 1888 (Albatrosses and petrels; ulappalinnut)
   |?- †Lonchodytes estesi Brodkorb, 1963 sensu Hope, 2002 [Lonchodytidae] [jr. synon. to Graculavidae?]
   |?- †Tytthostonyx glauconiticus Olson & Parris, 1987 E. Paleoc. ENA. [Tytthostonychidae]
   |--o †Diomedeoididae Fischer 1985
   |  `--o †Rupelornis van Beneden, 1871 [taxonomic history]
   |     |-- †R. definitus van Beneden, 1871 [taxonomic history]
   |     |-- †R. babaheydariensis (Peters & Hamedani, 2000); Mayr & Smith, 2012 [taxonomic history]
   |     `-- †R. sp. [L.Olig. Germany] [(Mayr, Peters & Rietschel, 2002) Mayr & Smith, 2012] [taxonomic history]
   `--+-- Diomedeidae Gray, 1840 [Diomedaedae] (Albatrosses; albatrossit)
      `--+-- Procellariidae Vigors, 1825 [non Leach, 1820?] (Petrels; Ulappaliitajät)
         `--+-- Hydrobatidae [Oceanitidae Forbes, 1882] (ulappakeijut)
            `--o Pelecanoididae Gray,1871
               `--o Pelecanoides Lacépède, 1799 (Diving Petrels; myrskysukeltajat)
                  |-- †P. sp.
                  |-- P. garnotii (Lesson, 1828) (perunmyrskysukeltaja)
                  |-- P. magellani (Mathews, 1912) (sepelmyrskysukeltaja)
                  |-- P. georgicus Murphy & Harper, 1916 (pikkumyrskysukeltaja)
                  `--o P. urinatrix (Gmelin, 1789) (myrskysukeltaja)
                     |-- P. u. berard (Gaimard, 1823) (Falkland Diving Petrel)
                     |-- P. u. chathamensis Murphy & Harper, 1916 [<Chatham Islands>]
                     |-- P. u. coppingeri Mathews, 1912
                     |-- P. u. dacunhae Nicoll, 1906
                     |-- P. u. exsul Salvin, 1896 (Kerguelen Diving Petrel)
                     `-- P. u. urinatrix (Gmelin, 1789) (Common Diving Petrel)

After Olson, 1985, Ericson, 1995, Feduccia, 1996, and Mayr, Peters & Rietschel, 2002

<==o Procellariiformes
   |?- †Lonchodytes
   |?-o †Tytthostonychidae
   |  `-- †Tytthostonyx
   |--o †Diomedeoididae Fischer 1985
   |  `-- †Diomedeoides Fischer, 1985
   `--+-- Diomedeidae
      `--+-- Hydrobatidae
         `-- Procellariidae [incl. Pelecanoididae]

After Livezey & Zusi, 2007

<==o Procellariiformes
   |--o Pelecanoidi
   |  `-- Pelecanoididae
   `--o Procellarae
      |--o Oceanitoidea
      |  `-- Oceanitidae [Hydrobatidae]
      `--o Procellarioidea
         |-- Procellariidae
         `-- Diomedeidae

Reference(s):