Hemichordata Animalia Flora and Fauna Biology

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.

• Top/Science/Earth Sciences/Paleontology/Invertebrates/Graptolites

• Chordata introduction - Phylum Hemichordata - A brief introduction to the hemichordates from the Biological Sciences animalia at the University of Paisley.
• Introduction to the Hemichordata - UCMP Berkeley\\'s introduction to the acorn worms. Includes information on hemichordata graptolites.
• Hemichordata (Acorn Worms and Pterobranchs) - Photograph of an acorn worm (Saccoglossus kowalevskii).

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