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TRIPLOBLASTICA

Claus Nielsen

in Animal Evolution: Interrelationships of the Living Phyla

Published in print:
2011
Published Online:
December 2013
ISBN:
9780199606023
eISBN:
9780191774706
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199606023.003.0014
Subject:
Biology, Evolutionary Biology / Genetics, Animal Biology

The Triploblastica is a clade consisting of species with three germ layers: the primary ectoderm and endoderm, and the secondary mesoderm. Mesoderm is often organised as epithelial cells that exhibit ... More


Phylum Chaetognatha

Claus Nielsen

in Animal Evolution: Interrelationships of the Living Phyla

Published in print:
2011
Published Online:
December 2013
ISBN:
9780199606023
eISBN:
9780191774706
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/acprof:oso/9780199606023.003.0055
Subject:
Biology, Evolutionary Biology / Genetics, Animal Biology

The Chaetognatha, or arrowworms, is a small phylum consisting of roughly 120 species of marine, mainly holopelagic ‘worms’. Some species, mainly of Spadella and Paraspadella, are benthic. ... More


Chaetognatha

Annelies Pierrot-Bults

in Marine Plankton: A practical guide to ecology, methodology, and taxonomy

Published in print:
2017
Published Online:
October 2017
ISBN:
9780199233267
eISBN:
9780191835698
Item type:
chapter
Publisher:
Oxford University Press
DOI:
10.1093/oso/9780199233267.003.0033
Subject:
Biology, Aquatic Biology, Ecology

This chapter describes the taxonomy of Chaetognatha, a small phylum of exclusively marine organisms with approximately 150 species currently recognized, of which about 70 are pelagic. Chaetognatha ... More


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