I don’t have time for anything at the moment, it’s terrible. So here’s this, from one of my talks on marine mammal diversity and evolution…
For more on Pezosiren portelli, see Domning (2001); the diagram contrasting the prorastomid, protosirenid and crown-sirenian is from Domning (2000). The Steller’s sea cow painting is by Maurice Wilson. Sirenians were previous covered on Tet Zoo in When manatees crossed the Atlantic.
Refs – -
Domning, D. P. 2000. The readaptation of Eocene sirenians to life in water. Historical Biology 14, 115-119.
- . 2001. The earliest known fully quadrupedal sirenian. Nature 413, 625-627.