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Text
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<a href="http://doi.org/10.1146/annurev.ecolysis.33.020602.095426" target="_blank" rel="noreferrer noopener">http://doi.org/10.1146/annurev.ecolysis.33.020602.095426</a>
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Pages
73-90
Volume
33
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Title
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The early radiations of cetacea (Mammalia): Evolutionary pattern and developmental correlations
Publisher
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Annual Review of Ecology and Systematics
Date
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2002
2002
Subject
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archaeocete; artiodactyls; development; Environmental Sciences & Ecology; evolution; Evolutionary Biology; feet; fossil record; India; locomotor evolution; marine mammal; middle eocene; origin; pakistan; Stenella attenuata; time; whales
Creator
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Thewissen J G M; Williams E M
Description
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The origin and early evolution of Cetacea (whales, dolphins, and porpoises) is one of the best examples of macroevolution as documented by fossils. Early whales are divided into six families that differ greatly in their habitats, which varied from land to freshwater, coastal waters, and fully marine. Early cetaceans lived in the Eocene (55-37 million years ago), and they show an enormous morphological diversity. Toward the end of the Eocene the modem cetacean body plan originated, and this body plan remained more or less the same in the subsequent evolution. It is possible that some aspects of this body plan are rooted in constraints that are dictated by cetacean embryologic development and controlled by genes that affect many organ systems at once. It may be possible to use a study of patterns of correlations among morphological traits to test hypotheses of developmental links among organ systems.
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<a href="http://doi.org/10.1146/annurev.ecolysis.33.020602.095426" target="_blank" rel="noreferrer noopener">10.1146/annurev.ecolysis.33.020602.095426</a>
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Journal Article
2002
Annual Review of Ecology and Systematics
archaeocete
artiodactyls
development
Environmental Sciences & Ecology
Evolution
Evolutionary Biology
Feet
fossil record
India
Journal Article
locomotor evolution
marine mammal
middle eocene
origin
Pakistan
Stenella attenuata
Thewissen J G M
Time
WHALES
Williams E M