Teuthoidea

Teuthoidea (squids; class Cephalopoda, subclass Coleoidea) An order of cephalopods which have an internal, elongate pro-ostracum. The phragmocone may be present, the rostrum is not. Eight arms and two tentacles are present. The order probably originated in the Lower Cretaceous from a belemnite (Belemnitida) ancestor. The squids are most closely related to the cuttlefish, both groups having ten suckered arms around the mouth.

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MICHAEL ALLABY. "Teuthoidea." A Dictionary of Zoology. 1999. Encyclopedia.com. 30 May. 2012 <http://www.encyclopedia.com>.

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MICHAEL ALLABY. "Teuthoidea." A Dictionary of Zoology. 1999. Retrieved May 30, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-Teuthoidea.html

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