Diestoceratidae

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(Added systematics, edited text)
 
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The Diestoceratidae were a family of cyrtoconic oncocerids from the Middle to Upper Ordovician with a characteristic cross-section.
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<u>Systematics</u> <br/>
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Class: [[Cephalopoda]]<br/>
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Subclass: [[Nautiloidea]] <br/>
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Order: [[Oncocerida]]<br/>
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Family: Diesoceratidae  <br/>
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'''Characters''' (from Sweet 1964): Compressed, straight to slightly endogastric brevicones. Siphuncle marginal, cyrtochoanitic with discrete, irregular actinosiphonate deposits.
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The Diestoceratidae is a family of cyrtoconic oncocerids from the Middle to Upper Ordovician.
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Diestoceratid shells are compressed, straight to slightly endogastric brevicones. That is short, cross section height greater than width, curvature arched. The siphuncle is marginal, cyrtochoanitic, with discrete, irregular actinosiphonate deposits.
==References==
==References==
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[S64] Sweet, W. C. 1964. Nautiloidea – Oncocerida. In ''Treatise on Invertebrate Paleontology'' pt. K. ''Mollusca 3. Cephalopoda – General Features – Endoceratoidea – Actinoceratoidea – Nautiloidea – Bactritoidea'' (R. C. Moore, ed.) pp. K277-K319. The Geological Society of America and the University of Kansas Press.
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Sweet, W. C. 1964. Nautiloidea – Oncocerida. In ''Treatise on Invertebrate Paleontology'' pt. K. ''Mollusca 3. Cephalopoda – General Features – Endoceratoidea – Actinoceratoidea – Nautiloidea – Bactritoidea'' (R. C. Moore, ed.) pp. K277-K319. Geological Society of America and University of Kansas Press.
'''Credits'''
'''Credits'''
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[[User:Christopher|Christopher]] 00:16, 16 January 2011 (UTC)
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[[User:Christopher|Christopher]] 16 Jan 2011<br/>
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[[user:John M|John M]] 6 Oct 2014

Latest revision as of 23:05, 6 October 2014

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