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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 Ambulacraria is a group in the animal kingdom that includes the echinoderms, pterobranchs, and enteropneusts. The ambulacrarians share similarities between their coelomic systems and their larvae. The pterobranchs and enteropneusts are either sister groups, or the former are an ingroup of the latter. The Hox genes bear an ‘ambulacrarian signature’.

Keywords:   echinoderms, pterobranchs, enteropneusts, Ambulacraria, Hox genes, ambulacrarians

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