Directory of Hemichordata Resources

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The hemichordates form a small phylum of a few hundred species. They are worm-like creatures with their bodies divided into 3 parts, a pre-oral lobe, a collar and a trunk. Their name means “half chordate” and they have certain primitive features that resemble those of true chordates. The three main groups are the Enteropneusta, or acorn worms, the Pterobranchia and the Graptolithina.

Subcategories

• Enteropneusta
• Planctosphaeroidea
• Pterobranchia

Resources in This Category

• Hemichordata

  http://en.wikipedia.org/wiki/Hemichordate
  Information from Wikipedia on this phylum of worm-shaped marine deuterostome organisms.

• 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. Includes information on graptolites.

• Phylum Hemichordata

  http://www.fossilmuseum.net/Tree_of_Life/PhylumHemichordata.htm
  Brief description of the phylum with images of some fossil species.

• The Phylum Hemichordata

  http://www.earthlife.net/inverts/hemichordata.html
  An introduction to the hemichordates including their characteristics and the two classes Enteropneusta and Pterobranchia.

Related Categories

• Home > Science > Earth Sciences > Paleontology > Invertebrates > Graptolites

 

Home > Science > Biology > Flora and Fauna > Animalia > Hemichordata

 

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