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Pennatulacea
Pennatulacea (sea pens; class Anthozoa, subclass Octocorallia) An order of colonial octocorals that have an elongate primary polyp embedded in mud on the sea-bottom. The distal end of the primary polyp bears secondary polyps, usually on lateral branches. The polyps are supported by a calcareous or horny skeleton. They are known first as fossils from Cretaceous and Tertiary strata, and with uncertainty from the Silurian. The order contains two suborders, 14 families, and about 40 genera.
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MICHAEL ALLABY. "Pennatulacea." A Dictionary of Zoology. 1999. Encyclopedia.com. 30 May. 2012 <http://www.encyclopedia.com>. MICHAEL ALLABY. "Pennatulacea." A Dictionary of Zoology. 1999. Encyclopedia.com. (May 30, 2012). http://www.encyclopedia.com/doc/1O8-Pennatulacea.html MICHAEL ALLABY. "Pennatulacea." A Dictionary of Zoology. 1999. Retrieved May 30, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-Pennatulacea.html |
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Pennatulacea
Pennatulacea See OCTOCORALLIA.
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Cite this article
AILSA ALLABY and MICHAEL ALLABY. "Pennatulacea." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 30 May. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "Pennatulacea." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 30, 2012). http://www.encyclopedia.com/doc/1O13-Pennatulacea.html AILSA ALLABY and MICHAEL ALLABY. "Pennatulacea." A Dictionary of Earth Sciences. 1999. Retrieved May 30, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-Pennatulacea.html |
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