Zoology: General

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Chondrostei

A Dictionary of Earth Sciences | 1999 | | Copyright

Chondrostei (chondrostean fish) Group of bony fish belonging to the subclass Actinopterygii. Often ranked as a super-order, the chondrosteans have a partly cartilaginous skeleton (see CARTILAGE), a heterocercal tail, a spiracle, and an intestinal spiral valve. The group includes the extant orders Acipenseriformes and Polypteriformes, and the extinct order Palaeonisciformes (palaeoniscids, or ‘ancient fish’).

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AILSA ALLABY and MICHAEL ALLABY. "Chondrostei." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "Chondrostei." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O13-Chondrostei.html

AILSA ALLABY and MICHAEL ALLABY. "Chondrostei." A Dictionary of Earth Sciences. 1999. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-Chondrostei.html

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Chondrostei

A Dictionary of Zoology | 1999 | | Copyright

Chondrostei A group of bony fish belonging to the subclass Actinopterygii. Often ranked as a superorder, the chondrosteans have a partly cartilaginous skeleton, a heterocercal tail, a spiracle, and an intestinal spiral valve. Apart from a number of fossil orders, it includes the extant order Acipenseriformes.

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MICHAEL ALLABY. "Chondrostei." A Dictionary of Zoology. 1999. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "Chondrostei." A Dictionary of Zoology. 1999. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O8-Chondrostei.html

MICHAEL ALLABY. "Chondrostei." A Dictionary of Zoology. 1999. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O8-Chondrostei.html

Learn more about citation styles