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| | Evolution of Cetaceans Dolphins and Whales |
 | | Some believe that the beaked whales evolved from this species, but there is limited evidence to support this. |
 | | In modern times, the superfamily Delphinoidea contains most of the living cetacean species, including the families Delphinidae, Phocoenidae, and Monodontidae, as well as the now defunct families Albireonidae and Kentriodontidae, which are thought to be ancestors. |
 | | The families Delphinidae, Phoceonidae, and Monodontidae are genetically very similar, with only a 10-15% variation in C-heterochromatin. |
| www.robins-island.org /dolphins_evolution.php (2104 words) |
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