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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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Phylum Vertebrata (Craniata)

Phylum Vertebrata (Craniata)

(p.377) 65 Phylum Vertebrata (Craniata)
Animal Evolution

Claus Nielsen

Oxford University Press

This chapter, which focuses on the phylum Vertebrata (Craniata), a monophyletic group that includes humans and other vertebrates, describes the general characters of chordates and the autapomorphies of vertebrates. It looks at the cyclostomes, which include the hagfish and lampreys, and shows a whole suite of characters that have been interpreted as ancestral to the vertebrates. The chapter discusses the character complexes that are regarded as important apomorphies of the chordates, including the notochord, neural tube, and longitudinal muscles along the chorda.

Keywords:   vertebrates, Vertebrata, chordates, autapomorphies, cyclostomes, lampreys, notochord, neural tube, longitudinal muscles, chorda

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