Parasphenoid
Theparasphenoidis a bone which can be found in thecraniumof manyvertebrates.It is an unpaireddermal bonewhich lies at the midline of the roof of the mouth. In many reptiles (including birds), it fuses to theendochondral(cartilage-derived) basisphenoid bone of the lower braincase, forming a bone known as the parabasisphenoid. Early mammals have a small parasphenoid, but for the most part its function has been replaced by thevomerbone. The parasphenoid has been lost inplacentalmammals andcaecilianamphibians.[1]
See also
[edit]References
[edit]- ^Atkins, Jade B.; Franz-Odendaal, Tamara A. (2016-04-01). "The evolutionary and morphological history of the parasphenoid bone in vertebrates".Acta Zoologica.97(2): 255–263.doi:10.1111/azo.12131.ISSN1463-6395.
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