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Phylum Ctenophora - English
URL: http://faculty.washington.edu/cemills/Ctenophores.html

A list of all valid scientific names maintained and published by Claudia E. Mills., Friday Harbor Laboratories and the Department of Zoology, University of Washington.

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Ctenophora: Taxonomy - English
URL: http://www.fmnh.helsinki.fi/users/haaramo/Metazoa/radiata/ctenophora.htm

Order Cydippida: Haeckeliidae, Lambeidae, Bathyctenidae, Pleurobrachiidae, Mertensiidae.

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ctenophore - Britannica.com - English
URL: http://www.britannica.com/bcom/eb/article/5/0,5716,28545 2 28096,00.html

Natural history. Natural history. The more primitive forms (order Cydippida) have a pair of long, retractable branched tentacles that function in the capture of food. The tentacles are richly supplied with adhesive cells called colloblasts, which are found only among ctenophores. These cells produce a sticky secretion, to which prey organisms adhere on contact.

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Ctenophora - English
URL: http://ag.arizona.edu/tree/eukaryotes/animals/ctenophora/ctenophora.html

Classification from Brusca and Brusca (1990).

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