Protosirenidae

Protosirenidae; Temporal range: Middle Eocene–Late Eocene PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Sirenia
Family:	†Protosirenidae
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
http://fossilworks.org/bridge.pl?a=taxonInfo&taxon_no=43290
Berta, Annalisa; Sumich, James; Kovacs, Kit (2005). Sirenian and Other Marine Mammals: Evolution and Systematics (PDF). Marine Mammals: Evolutionary Biology (2nd ed.). pp. 89–110. ISBN 9780120885527. Retrieved 15 July 2018.

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