Dusisiren Temporal range: Middle Miocene to Pliocene, 16–5 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Skeletons of adult and juvenile D. jordani at the Natural History Museum of Los Angeles County
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Sirenia
Family:	Dugongidae
Subfamily:	†Hydrodamalinae
Genus:	†Dusisiren
Type species
Dusisiren jordani Kellogg, 1925
Species
D. dewana Takahashi, Domning, and Saito, 1986 D. jordani (Kellogg, 1925) (type) D. reinharti Domning, 1978 D. takasatensis Kobayashi, Horikawa, & Miyazaki, 1995

Dusisiren is an extinct genus of dugong related to the Steller's sea cow that lived in the North Pacific during the Neogene.^[1]

Paleobiology

Dusisiren is a sirenian exemplar of the evolutionary theory of punctuated equilibrium. It evolved from a mangrove-eating ancestor to adapt to cold climates in the North Pacific by developing the capability to feed on kelp beds out on the open coast. The incipient modifications to the cervicals suggest that it was capable of maneuvering and feeding in high-energy environments of surf-swept coasts with deep, cold water.^[2][3]

Species

There are four recognized species of Dusisiren:

• Dusisiren jordani (Kellogg, 1925) (type)^[4]
• Dusisiren reinharti Domning, 1978^[2]
• Dusisiren dewana Takahashi, Domning, and Saito, 1986^[5]
• Dusisiren takasatensis Kobayashi, Horikawa, & Miyazaki, 1995^[6]