Basilosaurus is a genus of large, predatory, prehistoric archaeocete whale from the late Eocene, approximately 41.3 to 33.9 million years ago. First described in 1834, it was the first archaeocete and
Basilosaurus cetoides
Outdated restoration of Basilosaurus by Charles R. Knight from 1907 showing a serpent-like body-plan
Skeleton of B. isis at Wadi El Hitan
Basilosaurus isis fossil, Nantes History Museum in France
Basilosauridae is a family of extinct cetaceans that lived during the middle to late Eocene. Basilosaurids are known from all continents including Antarctica, and are probably the first fully aquatic
Basilosaurus
…that evolved the traits associated with Neocetes. Below is the phylogenetic analysis on the placement of Basilosaurus. Two subfamilies exist in Basilosauridae: Basilosaurinae which includes Basilosaurus, and Dorudontinae. These groups have been declared invalid in the past. Dorudon remains were once thought…
Dorudon skeletal diagram.
Cynthiacetus, mounted skeleton.
Zygorhiza, mounted skeleton.