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n. pl.1.(Zool.) The division of Cetacea which comprises the dolphins, porpoises, and related forms.
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Delphinoidea, especially closely related species, are challenging to distinguish from one another acoustically, and few studies have directly explored inter-specific variation (Steiner, 1981; Miller et al, 1995; Rendell et al, 1999; Baron et al, 2008; Gannier et al, 2010).
Superfamilia Delphinoidea Flower, 1865 Familia Kentriodontidae Slijper, 1936 Subfamilia Lophocetinae Barnes, 1978 Genus Hadrodelphis Kellogg, 1966 Hadrodelphis sp.
The tucuxi (Sotalia fluviatilis) belongs to the superfamily Delphinoidea, which includes all marine dolphins.