Semirostrum ceruttii

This a re-do of a drawing I made a couple of years ago. It shows a female Semirostrum cerutti and her calf, swimming in the coastal waters of Pliocene California. Semirostrum was a member of the porpoise family, but unlike it's extant relatives, it had an extremely long jaw, which was probably used for finding food in the sediment of estuaries and shallow seas. This bizarre cetacean was described in 2014 by a team of american palaeontologists.