Assertion: rib's bone | /r/CapableOf | extend to the basisphenoid
Facets:
value: downward
type: MANNER
Source sentences:
text: The typical snake skull has a solidly ossified braincase, with the separate frontal bones and the united parietal bones extending downward to the basisphenoid, which is large and extends forward into a rostrum extending to the ethmoidal region.