Articular bone: Difference between revisions
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[[File:Jaw joint - double.png| thumb | right | [[Morganucodon]]tidae had both types of jaw joint: [[dentary]]-[[squamosal]] (front) and [[articular]]-[[quadrate bone|quadrate]] (rear).]] |
[[File:Jaw joint - double.png| thumb | right | [[Morganucodon]]tidae had both types of jaw joint: [[dentary]]-[[squamosal]] (front) and [[articular]]-[[quadrate bone|quadrate]] (rear).]] |
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One theory is that in [[mammals]], the articular bone has migrated to the [[middle ear]] to become the [[malleus]], while the quadrate bone becomes the [[incus]]. [[Paleontologists]] regard this differace as the defining characteristic of mammalian fossils.<ref>{{cite web |
One theory is that in [[mammals]], the articular bone has migrated to the [[middle ear]] to become the [[malleus]], while the quadrate bone becomes the [[incus]]. [[Paleontologists]] regard this differace as the defining characteristic of mammalian fossils.<ref>{{cite web|url=http://www.palaeos.com/Vertebrates/Units/Unit420/420.000.html |title=Mammaliformes: Overview - Palaeos |deadurl=yes |archiveurl=https://web.archive.org/web/20070429203723/http://www.palaeos.com/Vertebrates/Units/Unit420/420.000.html |archivedate=2007-04-29 }}</ref> |
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==See also== |
==See also== |
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Revision as of 00:21, 10 July 2017
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The articular bone is part of the lower jaw of most vertebrates, including most jawed fish, amphibians, birds and various kinds of reptiles, as well as Stem-mammal. In these animals it is connected to two other lower jaw bones, the suprangular and the angular. It forms the jaw joint by articulating with the quadrate bone of the skull.
One theory is that in mammals, the articular bone has migrated to the middle ear to become the malleus, while the quadrate bone becomes the incus. Paleontologists regard this differace as the defining characteristic of mammalian fossils.[2]
See also
References
- ^ University of the Cumberlands, QUADRATE AND ARTICULAR EXPRESSION
- ^ "Mammaliformes: Overview - Palaeos". Archived from the original on 2007-04-29.
{{cite web}}: Unknown parameter|deadurl=ignored (|url-status=suggested) (help)
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