Pseudorthoceratidae

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(Taxonomy: linked subgroups)
(Systemic paleontology and other additions)
 
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The Pseudorthoceratidae were a Lower Silurian to Permian family of 'orthocerid' cephalopods. The relationship of this family to the remaining orthocerids is doubtful.
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<u>Systematic Paleontology</u><br/>
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Class: [[Cephalopoda]]<br/>
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Subclass: [[Nautiloidea]] <br/>
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Order: [[Pseudorthocerida]]<br/>
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Family: '''Pseudorthoceratidae'''
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'''Characters''' (from Sweet 1964): Cyrtochoanitic orthocones and longiconic cyrtocones; endosiphuncular annuli developing into continuous parietal endosiphuncular lining, each deposit extending forward or backward from its place of origin to join the next.
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The Pseudorthoceratidae is a family of Lower Silurian to Permian  orthoconic cephalopods included in the [[Pseudorthocerida]].
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Defining characters(Sweet 1964): Cyrtochoanitic orthocones and longiconic cyrtocones; endosiphuncular annuli developing into continuous parietal endosiphuncular lining, each deposit extending forward or backward from its place of origin to join the next.
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At one time the Pseudorthoceratidae were included in the superfamily Pseudorthocerataceae, which was part of the Orthocerida, also known as [[Michelinoceratida]].
==Taxonomy==
==Taxonomy==
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  [[Michelinoceratida|<==]]Pseudorthoceratidae [Mooreoceratidae, Shikhanoceratidae]
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  [[Pseudorthocerida|<==]]Pseudorthoceratidae [Mooreoceratidae, Shikhanoceratidae]
     |--Pseudactinoceratinae [Macroloxoceratinae, Pseudactinoceratidae] S64
     |--Pseudactinoceratinae [Macroloxoceratinae, Pseudactinoceratidae] S64
     |    |--''Pseudactinoceras'' Schindewolf 1943 S64
     |    |--''Pseudactinoceras'' Schindewolf 1943 S64
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[[User:Christopher|Christopher]] 07:50, 30 January 2011 (UTC)
[[User:Christopher|Christopher]] 07:50, 30 January 2011 (UTC)
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[[user:John M|John]] 7/15/2012

Latest revision as of 15:04, 15 July 2014

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