// Workers AI · dad joke modeWhat did the parasphenoid say? I'm a bone to pick.
The parasphenoid is a bone which can be found in the cranium of many vertebrates. It is an unpaired dermal bone which lies at the midline of the roof of the mouth. In many reptiles (including birds), it fuses to the endochondral (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 Early mammals have a small parasphenoid, but for the most part its function has been replaced by the vomer bone. The parasphenoid has been lost in placental mammals and caecilian amphibians.[1] In many early tetrapods the parasphenoid bears teeth (palatal dentition).[2]
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. ISSN 1463-6395.
- ↑ Matsumoto, Ryoko; Evans, Susan E. (January 2017). "The palatal dentition of tetrapods and its functional significance". Journal of Anatomy. 230 (1): 47–65. doi:10.1111/joa.12534. ISSN 0021-8782. PMC 5192890. PMID 27542892.
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