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Tuatara taxonomy and evolution

May 8, 2011 Written by nicolae
English

http://www.ccpictures.org/var/resizes/Recreation/Animals/Reptiles/Tuatara_cladogram.png?m=1304873904Cladogram showing relationships of extant members of the Sauria. Numbered items are:
1. Tuatara
2. Lizards
3. Snakes
4. Crocodiles
5. Birds
"Lizards" are paraphyletic. Branch lengths do not indicate divergence times.

Science: 
Reptiles
Tags: 
living fossils
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Prehistoric fish

December 4, 2008 Written by nicolae

Fish fossil from Cretaceous periodFish fossil from Cretaceous period

Prehistoric fish are various groups of fishes that lived before recorded history. A few, such as the coelacanth still exist today and are considered living fossils.

English
Science: 
Fish
Tags: 
living fossils
Society: 
History
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