Lagenida

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m (Protected "Lagenida" ([move=sysop] (indefinite)))
(taxa to taxonomy section, new section: dendrogram.)
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==Description==
==Description==
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'''Parent taxa:''' [[Rhizaria]], [[Foraminifera]], [[Polythalamea]].
 
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'''Sister or parent taxon:''' [[Fusulinida]].
 
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'''Significant daughter taxa:''' [[Lagenidae]], [[Nodosariidae]], [[Geinitzinidae]], [[Protonodosariidae]].
 
'''Age:''' [[Moscovian]] (later [[Carboniferous]]) to [[Recent]].
'''Age:''' [[Moscovian]] (later [[Carboniferous]]) to [[Recent]].
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'''Comments:''' The Lagenida after primarily distinguished from the closely related (and probably ancestral) Fusulinida by their possession of a hyaline-radial shell rather than the [[microgranular]] shell of the Fusulinida. Studies of the ultrastructure of the earliest genus of Lagenida, ''[[Syzrania]]'', show that this change in cell structure was achieved by the addition of a hyaline-radial layer over the outside of the microgranular shell, followed by the loss of the microgranular layer (Groves ''et al.'', 2003, 2004). ''Syzrania'' includes species both with and without the microgranular layer, and is probably [[paraphyletic]] and ancestral to all other lagenides (Groves ''et al.'', 2003). Because of this difference in shell structure, some authors have recommended excluding ''Syzrania'' (or at least some species thereof) from the Lagenida, but this seems more a matter of taste than of any actual disagreement over relationships.
'''Comments:''' The Lagenida after primarily distinguished from the closely related (and probably ancestral) Fusulinida by their possession of a hyaline-radial shell rather than the [[microgranular]] shell of the Fusulinida. Studies of the ultrastructure of the earliest genus of Lagenida, ''[[Syzrania]]'', show that this change in cell structure was achieved by the addition of a hyaline-radial layer over the outside of the microgranular shell, followed by the loss of the microgranular layer (Groves ''et al.'', 2003, 2004). ''Syzrania'' includes species both with and without the microgranular layer, and is probably [[paraphyletic]] and ancestral to all other lagenides (Groves ''et al.'', 2003). Because of this difference in shell structure, some authors have recommended excluding ''Syzrania'' (or at least some species thereof) from the Lagenida, but this seems more a matter of taste than of any actual disagreement over relationships.
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==Taxonomy and Phylogeny==
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==Taxonomy ==
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Kingdom:[[Protista]], or [[Rhizaria]] <br>
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Phylum: [[Granuloreticulosa]], or [[Retaria]]<br>
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Class:[[Foraminifera]], or in some taxonomies, a phylum <br>
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Order: '''Lagenida''' (=Lagenina) <br>
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Families:<br>
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:[[Lagenidae]]
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:[[Nodosariidae]]
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:[[Geinitzinidae]]
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:[[Protonodosariidae]].
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==Lagenid dendrogram==
  [[Rotaliina|<==]]Lagenida [Lagenina, Syzraniidae]
  [[Rotaliina|<==]]Lagenida [Lagenina, Syzraniidae]

Revision as of 13:56, 29 August 2012

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