Westonoceratidae

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==Phylogeny==
==Phylogeny==
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The westonoceratidae were most likely derived from the [[Cyrtogomphoceratidae|cyrogomphoceratid]] ''[[Ulirichoceras]]'', during the middle Ordovician, through the ancestal ''[[Teichertoceras]]'', which retains the endogastric character of its ancestor in the early part of the phragmocone.  
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The westonoceratidae were most likely derived from the [[Cyrtogomphoceratidae|cyrtogomphoceratid]] ''Ulirichoceras'', during the middle Ordovician, through the ancestral ''Teichertoceras'', which retains the endogastric character of its ancestor in the early part of the phragmocone.  
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''Teichertoceras'' apparently gave rise to two primary lineages within the Westonoceratdae. One consists of ''[[Westonoceras]]'' and ''[[Winnipegoceras'', (both m -u Ord), with ''[[Sinclairoceras]]'' and ''[[Simardocers]]'' mid Ord off shoots.  The  other consists of ''[[Faberoceras]]'' (m-u Ord), ''[[Clarkeswillia]]'' (u Ord), and  ''[[Glyptodentron]]'' (l Sil), with ''[[Reedsoceras]]'' (m Ord) and ''[[Hecatoceras]]'' (u Ord)  tentatively included.  ''Faberoceras'' is also the likely source of the Lowoceratdae.
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''Teichertoceras'' apparently gave rise to two primary lineages within the Westonoceratdae. One consists of ''Westonoceras'' and ''Winnipegoceras'', (both m -u Ord), with ''Sinclairoceras'' and ''Simardocers'' mid Ordovician off shoots.  The  other consists of ''Faberoceras'' (m-u Ord), ''Clarkeswillia'' (u Ord), and ''Glyptodentron'' (l Sil), with ''Reedsoceras'' (m Ord) and ''Hecatoceras'' (u Ord) tentatively included. ''Faberoceras'' is also the likely source of the Lowoceratdae.
==Dendrogram==
==Dendrogram==

Latest revision as of 14:20, 19 July 2014

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