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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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Animal Evolution

Claus Nielsen

Oxford University Press

The Deuterostomia is a well-delimited group of bilateral animals known for their blastopore that develops into the anus in the adult and a mouth which is a new opening from the bottom of the archenteron. The deuterostomes are represented by two well-defined groups: Ambulacraria and Chordata. The ambulacrarians include enteropneusts, pterobranchs, and echinoderms, while the chordates are comprised of vertebrates, cephalochordates, and urochordates. The Hox genes exhibit a characteristic deuterostome signature.

Keywords:   bilateral animals, Deuterostomia, blastopore, deuterostomes, Ambulacraria, Chordata, ambulacrarians, chordates, vertebrates, Hox genes

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