Concise hierarchy

(Kingdom) Animalia - (Phylum) Chordata - (Class) Mammalia - (Order) Cetartiodactyla

Original position

Questionably Delphinoidea (Superfamily) Gray, 1821

Original entries

Questionably †Goniodelphis (Genus) Allen, 1941
Questionably †Ischyrorhynchus (Genus) Ameghino, 1891
Questionably †Plicodontinia (Genus) Miranda-Ribeiro, 1938, nom. dub.
Questionably †Proinia (Genus) True, 1910
Questionably †Saurodelphis (Genus) Burmeister, 1891

Subsequent entries

Inia (Genus) d'Orbigny, 1834

Current position

Inioidea (Superfamily) de Muizon, 1988

Ref: C.J. Burgin et al., 2020: table 2 (p. 27).

Alternative positions

Delphinoidea (Superfamily) Gray, 1821	Ref: M.C. McKenna & S.K. Bell, 1997: 387.
Odontoceti (Suborder) Flower, 1867	Ref: D.E. Wilson & D.M. Reeder, 2011: 60.
Platanistoidea (Superfamily) Gray, 1846	Ref: I. Eibl-Eibesfeldt et al., 1974: 596.

Historical positions

Inioidea (Superfamily) de Muizon, 1988	Ref: C.J. Burgin et al., 2020: table 2 (p. 27).
Inioidea (Superfamily) de Muizon, 1988	Ref: F.G. Marx et al., 2016: 131-133, fig. 4.37.
Odontoceti (Suborder) Flower, 1867	Ref: D.E. Wilson & D.M. Reeder, 2011: 60.
Delphinoidea (Superfamily) Gray, 1821	Ref: M.C. McKenna & S.K. Bell, 1997: 387.
Platanistoidea (Superfamily) Gray, 1846	Ref: I. Eibl-Eibesfeldt et al., 1974: 596.

Number of Subtaxa

2024	Available in Systema Naturae 2000	1g;2s;2ss; †5g
1989-present	Systema Naturae 2000: 15 Jul 2022	[1g;2s; †5g]
2016	F.G. Marx et al.: 133	[1g; †5g]
2011	D.E. Wilson & D.M. Reeder: 60	1g;2s
1997	M.C. McKenna & S.K. Bell	[1g; †5g]