| Mammalia Linnaeus, 1758 |
| Afrotheria Stanhope et al., 1998 |
| Tethytheria McKenna, 1975 |
| Sirenia Illiger, 1811 sensu Vélez-Juarbe & Wood, 2018 |
| Dugongidae Gray, 1821 sensu Vélez-Juarbe & Wood, 2018 |
| Dugonginae Gray, 1821 (Simpson, 1932) sensu Vélez-Juarbe & Wood, 2018 |
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