Mammalia - Sirenia - Prorastomidae

Full reference: D. P. Domning. 2001. The earliest known fully quadrupedal sirenian. Nature 413:625-627

Parent taxon: Prorastomidae according to D. P. Domning 2008

Sister taxon: Prorastomus

Subtaxa: Pezosiren portelli

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Type: Pezosiren portelli

Ecology: aquatic herbivore