Proteoceratidae

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The Proteoceratidae were a Middle Ordovician to Middle Silurian family of orthocerid cephalopods.
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The Proteoceratidae is a family of Middle Ordovician to Middle Silurian [[Pseudorthocerida|pseudorthocerids]] (nautiloid cephalopods).
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'''Characters''' (from Sweet 1964): Smooth or annulated orthocones and exogastric cyrtoconeswith expanded cyrtochoanitic siphuncular segments in early stages and narrower, subcylindrical, orthochoanitic segments in later stages. Siphuncular deposits consist of annuli developing into parietal deposits by growth forward, backward, or in both directions from septal foramen. Cameral deposits usually well developed.
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Proteoceratids are characterized by smooth or annulated orthocones and exogastric cyrtocones with expanded cyrtochoanitic siphuncular segments in early stages and narrower, subcylindrical, orthochoanitic segments in later stages. Siphuncular deposits consist of annuli developing into parietal deposits by growth forward, backward, or in both directions from septal foramen. Cameral deposits usually well developed. (Sweet 1964)
==Taxonomy==
==Taxonomy==
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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.
[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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[S64] Sweet, W. C. 1964. Nautiloidea – Orthocerida. In ''Treatise on Invertebrate Paleontology'' pt. K. ''Mollusca 3. Cephalopoda – General Features – Endoceratoidea – Actinoceratoidea – Nautiloidea – Bactritoidea'' (R. C. Moore, ed.) pp. K216-K261. The Geological Society of America and the University of Kansas Press.
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[S64] Sweet, W. C. 1964. Nautiloidea – Orthocerida. In ''Treatise on Invertebrate Paleontology'' pt. K. ''Mollusca 3. Endoceratoidea – Actinoceratoidea – Nautiloidea – Bactritoidea'' (R. C. Moore, ed.) pp. K216-K261. The Geological Society of America and the University of Kansas Press.
'''Credits'''
'''Credits'''
[[User:Christopher|Christopher]] 23:34, 28 January 2011 (UTC)
[[User:Christopher|Christopher]] 23:34, 28 January 2011 (UTC)
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[[user:John M|John]] 15 July 2014

Revision as of 15:31, 15 July 2014

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