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Hemichordata
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A brief introduction to the hemichordates from the Biological Sciences at the University of Paisley.
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Chordata introduction Phylum Hemichordata The hemichordates also have pharyngeal gill slits an unusual form of dorsal nerve cord and a similar structure to notochord. These features should qualify them to be included in the phylum Chordata and they were included in this phylum until...UCMP Berkeley's introduction to the acorn worms. The site includes information on graptolites.
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Introduction to the Hemichordata Not familiar creatures to most people, hemichordates form a small phylum (only a few hundred species Their importance for the study of vertebrate evolution, however, cannot be underestimated. The fossil record of one group of hemichordates, the graptolites, is very...Photograph of an acorn worm (Saccoglossus kowalevskii).
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Hemichordata Go to navigation for this section of the ToL site Go to quick links Go to quick search Go to detailed site links Site Navigation Browse Help Features Learning Contribute About advanced go to beginning of page Temporary Page Containing...