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July 31 (UPI) --New X-ray images of ancient fish fossils have helped scientists solve a 160-year-old mastery about the origins of the vertebrate skeleton. Heterostracans are a group of fossil fishes ...
Front Cover; Biology and Physiology of Freshwater Neotropical Fish; Copyright; Contents; Contributors; Chapter 1: Phylogeny and classification of Neotropical fish ...
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