Protosirenidae

Protosirenidae; Temporal range: Middle Eocene–Late Eocene PreꞒ Ꞓ O S D C P T J K Pg N
	The skeleton of Protosiren
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Sirenia
Family:	†Protosirenidae; Sickenberg, 1934
Genera
	Ashokia; Libysiren; Protosiren;

Protosirenidae is an extinct primitive family of the order Sirenia.^[1]^[2]

Protosirenids are thought to have been amphibious quadrupeds, meaning that they spent their time both on land and in the water and had four legs.^[3]

References

^ D. P. Domning, G. J. Heal, and S. Sorbi. 2017. Libysiren sickenbergi, gen. et sp. nov.: a new sirenian (Mammalia, Protosirenidae) from the middle Eocene of Libya. Journal of Vertebrate Paleontology 37(2):e1299158
^ "Fossilworks: Protosirenidae".
^ Berta, Annalisa; Sumich, James; Kovacs, Kit (2005). Sirenian and Other Marine Mammals: Evolution and Systematics (PDF) (2nd ed.). Elsevier Science. pp. 89–110. ISBN 9780120885527. Retrieved 15 July 2018. {{cite book}}: |work= ignored (help)