Biology: Flora and Fauna: Animalia: Hemichordata

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Pterobranchia (13)

LINKS:

Chordata introduction - Phylum Hemichordata
http://orion1.paisley.ac.uk/courses/Tatner/biomedia/units/chor5.htm
A brief introduction to the hemichordates from the Biological Sciences at the University of Paisley.

Hemichordata (Acorn Worms and Pterobranchs)
http://tolweb.org/tree?group=Hemichordata&contgroup=Metazoa
Photograph of an acorn worm (Saccoglossus kowalevskii).

Introduction to the Hemichordata
http://www.ucmp.berkeley.edu/chordata/hemichordata.html
UCMP Berkeley's introduction to the acorn worms. The site includes information on graptolites.

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