Arsinoitherium is an extinct genus of paenungulate mammal belonging to the extinct order Embrithopoda. It is related to elephants, sirenians, hyraxes and the extinct desmostylians. Arsinoitheres were elephant-like herbivores that lived during the late Eocene and the early Oligocene of northern Africa from 36 to 30 million years ago, in areas of tropical rainforest and at the margin of mangrove swamps. A newly discovered species, Arsinoitherium giganteum, lived in Ethiopia ~27 million years ago.
- Series: Prehistoric Animals Dinosaurs
- Country: Malagasy Republic
- Year: 1988
- Subject: Animals
- Face value: 250 Fmg
- Number of Scott Standard Postage Stamp Catalogue 901