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Lepospondyls

Lepospondyli

A Dictionary of Earth Sciences | 1999 | | Copyright

Lepospondyli Group of small Palaeozoic amphibians, distinguished by the possession of vertebrae with spool- shaped centra below the neural arches. Each centrum (the massive part of the vertebra) was perforated lengthwise, providing a channel for the notochord. The lepospondylous, or ‘husk’, vertebra also occurs in living amphibians, but its evolutionary derivation is unclear.
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AILSA ALLABY and MICHAEL ALLABY. "Lepospondyli." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>.

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

AILSA ALLABY and MICHAEL ALLABY. "Lepospondyli." A Dictionary of Earth Sciences. 1999. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-Lepospondyli.html

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Lepospondyli

A Dictionary of Zoology | 1999 | | Copyright

Lepospondyli (class Amphibia) A group of small, Palaeozoic amphibians in which the vertebrae have spool-shaped centra (see CENTRUM) below the neural arches. The centra were each perforated lengthwise, providing a channel for the notochord. The lepospondylous, or ‘husk’, vertebra also occurs in living amphibians, but its evolutionary derivation is unclear.
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MICHAEL ALLABY. "Lepospondyli." A Dictionary of Zoology. 1999. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>.

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

MICHAEL ALLABY. "Lepospondyli." A Dictionary of Zoology. 1999. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-Lepospondyli.html

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Microsauria

A Dictionary of Zoology | 1999 | | Copyright

Microsauria A group of very small, Carboniferous and Permian amphibians that are thought to be ancestral to the modern Apoda.
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MICHAEL ALLABY. "Microsauria." A Dictionary of Zoology. 1999. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>.

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

MICHAEL ALLABY. "Microsauria." A Dictionary of Zoology. 1999. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-Microsauria.html

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