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Animal EvolutionInterrelationships of the Living Phyla$
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Claus Nielsen

Print publication date: 2011

Print ISBN-13: 9780199606023

Published to Oxford Scholarship Online: December 2013

DOI: 10.1093/acprof:oso/9780199606023.001.0001

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(p.1) 1 Introduction
Animal Evolution

Claus Nielsen

Oxford University Press

Charles Darwin revolutionised biological thought by suggesting that the origins of species were the result of ‘descent with modification’. His theory of evolution gave the word ‘homology’ its present meaning and importance. The first phylogenetic tree was created based on Darwin’s ideas about evolution, speciation, and natural selection. This book focuses on the origin of the living phyla, which are now separated from each other by distinct morphological gaps, and uses phylogenetic/cladistic principles to infer the topology of the basal metazoan radiation.

Keywords:   evolution, Charles Darwin, homology, phylogenetic tree, speciation, natural selection, phyla, radiation

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