Diestoceratidae

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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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==Taxonomy==
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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.
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[[Oncoceratidae|<==]]Diestoceratidae
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    |--''Danoceras'' Troedsson 1926 [incl. ''Hyperoceras'' Foerste 1928] S64
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    |    `--*''D. ravni'' Troedsson 1926 S64
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    |--''Dowlingoceras'' Foerste 1928 S64
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    |    `--*''D. gracile'' (Whiteaves 1892) [=''Poterioceras gracile''] S64
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    |--''Lyckholmoceras'' Teichert 1930 S64
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    |    `--*''L. estoniae'' Teichert 1930 S64
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    |--''Suttonoceras'' Miller & Youngquist 1947 S64
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    |    `--*''S. rossorum'' Miller & Youngquist 1947 S64
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    `--''Diestoceras'' Foerste 1924 S64
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        |--*''D. indianense'' (Miller & Faber 1894) [=''Gomphoceras indianense''] S64
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        |--''D. curtum'' Foerste 1935 P68
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        |--''D. fremontense'' Foerste 1935 P68
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        |--''D. kirki'' Foerste 1935 P68
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        |--''D. landerense'' P68
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        |--''D. magister'' Foerste 1935 P68
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        |--''D. occidentale'' Foerste 1935 P68
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        |--''D. schucherti'' Foerste 1928 P68
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        |--''D. shideleri'' Foerste 1924 P68
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        `--''D. walcotti'' Foerste 1935 P68
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<nowiki>*</nowiki> Type species of generic name indicated
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==References==
==References==
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[P68] Purnell, L. R. 1968. Catalog of the Type Specimens of Invertebrate Fossils. Part I: Paleozoic Cephalopoda. ''United States National Museum Bulletin'' 262: 1-198.
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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.
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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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'''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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