Lichida

A Dictionary of Earth Sciences | 1999 | 216 words | Copyright

Lichida An order of Trilobita that lived from the Middle Cambrian to Middle Devonian. They were medium-sized to very large, usually spiny, and in many the pygidium is larger than the cephalon. There were 3 suborders.

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AILSA ALLABY and MICHAEL ALLABY. "Lichida." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "Lichida." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O13-Lichida.html

AILSA ALLABY and MICHAEL ALLABY. "Lichida." A Dictionary of Earth Sciences. 1999. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-Lichida.html

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