Orbitosphenoid


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Or`bi`to`sphe´noid


a.1.(Anat.) Of or pertaining to the sphenoid bone and the orbit, or to the orbitosphenoid bone.
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In the orbitotemporal region of chondrocranium, the orbitosphenoid is observed (Table 1).
Sphenoid bone has a body formed by pre sphenoid and post sphenoid centers along with medial crus of orbitosphenoid.
Two other features may be interpreted as synapomorphies of this clade if a 'fast optimization' is chosen: rostrodermethmoids ossified and not fused with median supraethmoid (29: 0 [right arrow] 1) and orbitosphenoid not present as independent ossification (44: 0 [right arrow] 1).
Authors such as Jollie (1975) and Arratia (1997, 1999) have described/coded the orbitosphenoid as present in Esox and/or Thymallus.