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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 Phoronida

Phylum Phoronida

(p.224) 40 Phylum Phoronida
Animal Evolution

Claus Nielsen

Oxford University Press

The Phoronida comprises only about twelve species in two genera, Phoronis and Phoronopsisis, making it one of the smallest phyla in the entire animal kingdom. The fossil record is unreliable, although phoronid burrows have been inferred from the Cretaceous ichnofossil Talpina and some older burrows in calcareous material. All species are marine and benthic, with a generally solitary life form. Phoronis ovalis, the smallest species, may form lateral buds from the body to generate small, temporary colonies. Molecular phylogeny indicates that the phoronids are placed within the Lophotrochozoa/Trochozoa.

Keywords:   phoronids, Phoronida, Phoronis, Phoronopsisis, Talpina, Phoronis ovalis, Lophotrochozoa, Trochozoa

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