Parasphenoid
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Bone in the cranium of some vertebrates
The parasphenoid is a bone which can be found in the
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 Early mammals have a small parasphenoid, but for the most part its function has been replaced by the vomer bone.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]
See also
- Ossification of frontal bone
- Terms for anatomical location
References
- ISSN 1463-6395.
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Squamous part
- Frontal suture
- Frontal eminence
- external
- Superciliary arches
- Glabella
- foramina
- Zygomatic process
- internal
Squamous part
- Articular tubercle
- Suprameatal triangle
- Mandibular fossa
- Petrotympanic fissure
- Zygomatic process
- Mastoid foramen
- Mastoid process (Mastoid cells)
- Mastoid notch
- Occipital groove
- Sigmoid sulcus
- Mastoid antrum (Aditus)
- Carotid canal
- Facial canal
- Internal auditory meatus
- Cochlear aqueduct
- Stylomastoid foramen
- fossae
- canaliculi
- Inferior tympanic
- Mastoid
- Styloid process
- Petrosquamous suture
- (note: ossicles in petrous part, but not part of temporal bone)
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Labyrinth |
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Hyoid |
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- Baubellum
- Gastralia
- Ossified tendon
- Osteoderms
- Parentheses denote bones that receive a different name in particular clades
- Italics denote neomorphic bones present only in particular clades
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