Information om | Engelska ordet PARABASISPHENOID

Exempel på hur man kan använda PARABASISPHENOID i en mening

• Synapomorphies of this clade were reported to be: two large palpebral bones, a squamosal bone which contacts the rear surface of the quadrate bone, an enclosure of the cranioquadrate canal by the squamosal and occipital bones, a convergence of the laterosphenoid and the quadrate, a contact between the otoccipital and the quadrate, an expansive and pneumatic parabasisphenoid, a developed ridge on the back of the ectopterygoid projecting along the interior surface of the jugal bone, a front edge of the scapular blade which is larger than the rear edge, and a low olecranon process of the ulna.
• Bones we have found are: left quadratojugal, postfrontal, supratemporal, postorbital, basioccipital and both tubera basioccipitalia, the parabasisphenoid, the otic capsule containing both opisthotic and prootic bones, exoccipital, supraoccipital and pterygoid.
• 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.
• The parabasisphenoid bone at the bottom of the braincase has a semilunar depression like that of Venaticosuchus, but the gap between its basipterygoid processes and basitubera is less acute than in that taxon.
• At the same time, it differs from Eodicynodon and all other dicynodonts by the combination of lacking a tusk and caniniform process, absence of a secondary palate, lateral exposure of the septomaxilla, and a parabasisphenoid that reaches the interpterygoid vacuity—all features it shares with various earlier anomodonts.

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