Classification of Aguirre-Fernández et al. 2017

Infraor. Delphinida Muizon 1984
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Superfm. Inioidea de Muizon 1988
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Fm. Iniidae Gray 1846
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G. †Ischyrorhynchus Ameghino 1891
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†Ischyrorhynchus vanbenedeni Ameghino 1891
Infraor. Platanistida Fordyce and de Muizon 2001
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Superfm. Platanistoidea Simpson 1945
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Fm. Platanistidae Gray 1846
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G. †Zarhachis Cope 1868
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†Zarhachis flagellator Cope 1868
Invalid names: Tachyrgrhynchus Odreman-Rivas 1997 [nomen nudum]