Difference between revisions of "Palaeognathae"

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m (Kikimalou moved page Ratite to Palaeognathae without leaving a redirect)
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| width=960 colspan=6 | A ratite is any of a diverse group of large, flightless birds of the superorder Palaeognathae. There is still some controversy regarding the systematics involved. Some sources state that Ratites are synonymous with Struthioniformes, while other sources state that Ratites are the same group, only that the order Struthioniformes contains only the Ostrich and possibly the Elephant Bird. Ratites belong to the modern bird superorder Palaeognathae which consists of ratites and tinamous (compare to Neognathae). Unlike other flightless birds, the ratites have no keel on their sternum – hence the name from the Latin ratis (for raft). Without this to anchor their wing muscles, they could not fly even if they were to develop suitable wings.
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| width=960 colspan=6 | Palaeognathae is one of 2 living clades of birds – the other being Neognathae. Palaeognathae contains five extant branches of flightless lineages (plus two extinct clades), termed ratites, and one flying lineage, the Neotropic tinamous. Recent research has indicated that paleognaths are monophyletic but the traditional taxonomic split between flightless and flighted forms is incorrect; tinamous are within the ratite radiation, meaning flightlessness arose independently multiple times via parallel evolution.
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There are three extinct groups that are undisputed members of Palaeognathae: the Lithornithiformes, the Dinornithiformes (moas) and the Aepyornithiformes (elephant birds)
  
Most parts of the former Gondwana Supercontinent have ratites, or did have until the fairly recent past. Their closest living relatives are the tinamous of South America.
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For more information, visit the [http://en.wikipedia.org/wiki/Palaeognathae Wikipedia entry].
 
 
For more information, visit the [http://en.wikipedia.org/wiki/Ratite Wikipedia entry].
 
  
 
'''Get back to [[Aves]]'''
 
'''Get back to [[Aves]]'''
 
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| width=160 | [[File:Safari225429Face1.JPG|60px|link= Cassowary]] [[Cassowary]]
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| width=240 | [[File:Safari225429Face1.JPG|60px|link= Cassowary]] [[Cassowary]]
| width=160 | [[File:YowieEmuary1.jpg|60px|link= Emuarius]] †[[Emuarius]]
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| width=240 | [[File:YowieEmuary1.jpg|60px|link= Emuarius]] †[[Emuarius]]
| width=160 | [[File:Emu.JPG|60px|link= Emu]] [[Emu]]
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| width=240 | [[File:Emu.JPG|60px|link= Emu]] [[Emu]]
| width=160 | [[File:Kiwi.jpg|60px|link= Kiwi]] [[Kiwi]]
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| width=240 | [[File:Kiwi.jpg|60px|link= Kiwi]] [[Kiwi]]
| width=160 | [[File:Collecta88459face.JPG|60px|link= Ostrich]] [[Ostrich]]
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| width=160 | [[File:Rhea.jpg|60px|link= Rhea]] [[Rhea]]
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| [[File:YowieGiantMoa.jpg|60px|link=Dinornithiformes]] [[Dinornithiformes |† Moas]]
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| [[File:Collecta88459face.JPG|60px|link= Ostrich]] [[Ostrich]]
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| [[File:Rhea.jpg|60px|link= Rhea]] [[Rhea]]
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Revision as of 09:13, 11 November 2020

Palaeognathae is one of 2 living clades of birds – the other being Neognathae. Palaeognathae contains five extant branches of flightless lineages (plus two extinct clades), termed ratites, and one flying lineage, the Neotropic tinamous. Recent research has indicated that paleognaths are monophyletic but the traditional taxonomic split between flightless and flighted forms is incorrect; tinamous are within the ratite radiation, meaning flightlessness arose independently multiple times via parallel evolution.

There are three extinct groups that are undisputed members of Palaeognathae: the Lithornithiformes, the Dinornithiformes (moas) and the Aepyornithiformes (elephant birds)

For more information, visit the Wikipedia entry.

Get back to Aves

Safari225429Face1.JPG Cassowary YowieEmuary1.jpgEmuarius Emu.JPG Emu Kiwi.jpg Kiwi
YowieGiantMoa.jpg † Moas Collecta88459face.JPG Ostrich Rhea.jpg Rhea