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Revision as of 16:09, 14 September 2008
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Choristoderes, also known as champsosaurs, are a linage of extinct lizard/crocodile like aquatic reptiles, which became in our world.
In Terra Alternativa
The evolution of choristoderes in Terra Alternativa parallels that of Earth's; however, those in this parallel Earth remained alive, occupying the niches of gharials (which either became extinct or evolved into terrestrial, ant-eater like forms). An extinct linage, Pelagochampsosauridae, gave rise to marine forms in the Eocene period, successfully outcompeting the last marine crocodiles; however, changes in the oceanic currents, plus the evolution of marine of marine cynodonts, eventually caused their demise. Nowdays most species belong to the family Champsosauridae, which was also present in our world, most members are freshwater forms from America and Africa, although a few gave rise to marine species, found mostly in the Pacific Ocean and Carabbean.
In What if Dinosaurs
In What if Dinosaurs the evolutionary history of choristoderes was similar to the previous ones; like in Terra Alternativa, some marine champsosaurids have also evolved.
See also
Choristoderes on Wikipedia
