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periderm

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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"periderm." A Dictionary of Earth Sciences. . Encyclopedia.com. 21 Aug. 2017 <http://www.encyclopedia.com>.

"periderm." A Dictionary of Earth Sciences. . Encyclopedia.com. (August 21, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/periderm

"periderm." A Dictionary of Earth Sciences. . Retrieved August 21, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/periderm

periderm

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

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"periderm." A Dictionary of Zoology. . Encyclopedia.com. 21 Aug. 2017 <http://www.encyclopedia.com>.

"periderm." A Dictionary of Zoology. . Encyclopedia.com. (August 21, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/periderm-1

"periderm." A Dictionary of Zoology. . Retrieved August 21, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/periderm-1

periderm

periderm See cork cambium.

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"periderm." A Dictionary of Biology. . Encyclopedia.com. 21 Aug. 2017 <http://www.encyclopedia.com>.

"periderm." A Dictionary of Biology. . Encyclopedia.com. (August 21, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/periderm-2

"periderm." A Dictionary of Biology. . Retrieved August 21, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/periderm-2

periderm

periderm See BARK.

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"periderm." A Dictionary of Plant Sciences. . Encyclopedia.com. 21 Aug. 2017 <http://www.encyclopedia.com>.

"periderm." A Dictionary of Plant Sciences. . Encyclopedia.com. (August 21, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/periderm-0

"periderm." A Dictionary of Plant Sciences. . Retrieved August 21, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/periderm-0