Zoology: General

A Dictionary of Earth Sciences A Dictionary of Zoology A Dictionary of Biology A Dictionary of Plant Sciences Further reading

periderm

A Dictionary of Earth Sciences | 1999 | | Copyright

periderm The thin, sheet-like material that makes up the skeleton in graptolites (Graptolithina). Long thought to be chitin, it is now considered perhaps to be collagen (a scleroprotein). It is bi-layered, with an inner fusellar layer and outer cortical layer which have distinct structural differences.

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AILSA ALLABY and MICHAEL ALLABY. "periderm." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 30 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "periderm." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 30, 2012). http://www.encyclopedia.com/doc/1O13-periderm.html

AILSA ALLABY and MICHAEL ALLABY. "periderm." A Dictionary of Earth Sciences. 1999. Retrieved May 30, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-periderm.html

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periderm

A Dictionary of Zoology | 1999 | | Copyright

periderm In invertebrates, the thin sheets of material that make up the skeleton.

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

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

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

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periderm

A Dictionary of Biology | 2004 | Copyright

periderm See cork cambium.

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"periderm." A Dictionary of Biology. 2004. Encyclopedia.com. (May 30, 2012). http://www.encyclopedia.com/doc/1O6-periderm.html

"periderm." A Dictionary of Biology. 2004. Retrieved May 30, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O6-periderm.html

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periderm

A Dictionary of Plant Sciences | 1998 | | Copyright

periderm See BARK.

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MICHAEL ALLABY. "periderm." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 30 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "periderm." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (May 30, 2012). http://www.encyclopedia.com/doc/1O7-periderm.html

MICHAEL ALLABY. "periderm." A Dictionary of Plant Sciences. 1998. Retrieved May 30, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-periderm.html

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