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A comparative morphology of the three described whales, Basilosaurus isis, Dorudon atrox, and Orcinus orca.

A comparative morphology of the three described whales, Basilosaurus isis, Dorudon atrox, and Orcinus orca.

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Basilosauridae are aquatic Archaeoceti whales, included larger Basilosaurus isis and smaller Dorudon atrox in the middle to upper Eocene Gehannam and Birket Qaroun formations (38–36.5 Ma) of Wadi El-Hitan, Fayoum, Egypt. In this study, 123 specimens of Basilosauridae are discovered from Gehannam and Birket Qaroun formations. B. isis and D. atrox ar...

Contexts in source publication

Context 1
... sternum is large and dense, which weighs down the ventral midline to keep the body trim in water like that present in O. orca. The forelimbs are evolved into flippers that are effective hydrofoils for steering while swimming (Rice 1998;Uhen 2004;Gingerich, et al. 2009; see Figure 9). D. atrox has aquatic adaptations shared with O. orca. ...
Context 2
... of D. atrox were adequately adapted to living in the warm shallow seas of the Eocene of Egypt. O. orca can also live at the shallow water (Federal MDA 2004;Uhen 2004) and Schur 2004;Uhen 2004; see Figure 9). ...
Context 3
... sternum is large and dense, which weighs down the ventral midline to keep the body trim in water like that present in O. orca. The forelimbs are evolved into flippers that are effective hydrofoils for steering while swimming (Rice 1998;Uhen 2004;Gingerich, et al. 2009; see Figure 9). D. atrox has aquatic adaptations shared with O. orca. ...
Context 4
... of D. atrox were adequately adapted to living in the warm shallow seas of the Eocene of Egypt. O. orca can also live at the shallow water (Federal MDA 2004;Uhen 2004) and Schur 2004;Uhen 2004; see Figure 9). ...

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Basilosauridae are aquatic Archaeoceti whales, included largerBasilosaurus isisand smallerDorudon atroxin the middle to upper Eocene Gehannam and Birket Qaroun formations (38–36.5 Ma) of Wadi El-Hitan, Fayoum, Egypt. In this study, 123 specimens of Basilosauridae are discovered from Gehannam and Birket Qaroun formations.B. isisandD. atroxare repres...