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| | Cetacea (Site not responding. Last check: 2007-10-29) |
 | | Cetaceans are ecologically very diverse as their habitats vary from coastal to pelagic, from tropical to polar, and from marine to fresh water, while their preys vary from planctonic crustaceans to fish, squids, and marine mammals. |
 | | The close relationship between cetaceans and ungulates (and especially artiodactyls) was strongly supported by basically all molecular data published to date: from immunological (e.g., Boyden and Gemeroy, 1950; Shoshani, 1986) and DNA-DNA hybridization (Milinkovitch, 1992) studies, to analyses of mitochondrial and nuclear amino-acid and DNA sequences (e.g., Czelusniak et al. |
 | | The morphology of the ankle (mainly the astragalus and calcaneum) of these terrestrial cetaceans suggest that Cetacea are the sister group of monophyletic Artiodactyla, and that [artiodactyls, cetaceans] form the sister group of mesonychians. |
| tolweb.org /Cetacea/15977 (2869 words) |
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