ammonites
†superfamily Prorastomoidea Heal 1973 (sirenian)

Mammalia - Sirenia

Full reference: G. J. Heal. 1973. Contributions to the Study of Sirenian Evolution. 1-245

Parent taxon: Sirenia according to G. J. Heal 1973

Sister taxa: Dugongidae, Dugongoidea, Prorastomidae, Protosirenidae, Rhytinidae, Trichechidae

Subtaxa: Eotheroididae

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Ecology: aquatic herbivore