After Olson, 1985, Sibley & Monroe, 1990, Feduccia, 1980, 1996, Olson & Rasmussen, 2001, and Peterson, 2002-2004, with Finnish vernacular names from Lokki, Jännes & Nikander, 1992

<==o Pelecanidae Rafinesque, 1815 (pelicans; pelikaanit)
   |?- †Protopelicanus cuvieri
   |-- †Miopelecanus gracilis
   `--o Pelecanus Linnaeus, 1758 (Pelicans; pelikaanit)
      |-- †P. gracilis
      |-- †P. intermedius
      |-- †P. cauleyi
      |-- †P. sivalensis
      |-- †P. odessanus
      |-- †P. halieus
      |-- †P. schreiberi Olson, 1999
      |-- P. onocrotalus Linnaeus, 1758 (Great white pelican; pelikaani) [incl. P. roseus Gmelin, 1789] (Eastern white pelican; ruusupelikaani)
      |-- P. rufescens Gmelin, 1789 (Pink-backed Pelican; afrikanpelikaani)
      |-- P. philippensis Gmelin, 1789 (Spot-billed Pelican; pisamapelikaani)
      |-- P. crispus Bruch, 1832 (Dalmatian Pelican; kiharapelikaani)
      |--+?- P. conspicillatus Temminck, 1824 (Australian Pelican; australianpelikaani) [incl. P. novaezealandiae Scarlett, 1966 (New Zealand Pelican; uudenseelanninpelikaani)] 
      |  `?- †P. cadimurka (australianpikkupelikaani)
      |-- P. erythrorhynchos Gmelin, 1789 (American White Pelican; punanokkapelikaani)
      |--o P. occidentalis Linnaeus, 1766 (Brown Pelican; ruskopelikaani)
      |  |-- P. o. californicus Ridgway, 1884
      |  |-- P. o. carolinensis Gmelin, 1789
      |  |-- P. o. murphyi Wetmore, 1945
      |  |-- P. o. occidentalis Linnaeus, 1766
      |  |-- P. o. urinator Wetmore, 1945
      `-- P. thagus Molina, 1782 (Peruvian Pelican)


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