The basisphenoid forms the posterior part of the base, while the pterygoid processes represent the pterygoid bones.
2.
He was the first anatomist to publish descriptions of satisfactory pterygoid process and the sphenoid bone and bone clinoideo tear.
3.
The superior portion of the pterygoid processes are fused anteriorly; a vertical groove, the pterygopalatine fossa, descends on the front of the line of fusion.
4.
The anterior surface of the pterygoid process is broad and triangular near its root, where it forms the posterior wall of the pterygopalatine fossa and presents the anterior orifice of the pterygoid canal.
5.
The forward center of the quadrate's ventral articulation ridge extends downwards and to the middle, and the pterygoid process is only slightly expanded to the upper center in " Odontopteryx ".
6.
Each bone articulates in front with the ethmoid, laterally with the palatine; its pointed posterior extremity is placed above the vomer, and is received between the root of the pterygoid process laterally and the rostrum of the sphenoid medially.
7.
The presphenoid is united to the postsphenoid about the eighth month, and at birth the sphenoid is in three pieces [ Fig . 4 ] : a central, consisting of the body and small wings, and two lateral, each comprising a great wing and pterygoid process.
8.
But the two taxa may be distinguished by differences in the length of the maxillary tooth row ( 40 % instead of 26, 7 % of total skull length ), an unfused basipterygoid-pterygoid process in " Gobisaurus ", the presence of an elongate vomerine premaxillary process in " Gobisaurus ", and the presence of cranial sculpting in " Shamosaurus ", but not in " Gobisaurus ".
Meaning
two bony processes descending from the body of the sphenoid bone
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