Large median unpaired cartilage bone that contacts the exoccipital, epiotic and pterotic dorsally, and the parasphenoid anteriorly. Forms the posteroventral hind margin of the cranium, articulates with the centrum of the first vertebra. Bears a posteroventral pharyngeal process that is flattened ventrally and opposes the pharyngeal teeth of the fifth pair of ceratobranchials. [ GOC:mh ORCiD:0000-0001-9114-8737 ]
Term information
Term relations
- endochondral bone
- basioccipital bone
- part of some occipital region
- part of some chondrocranium
- part of some neurocranium
- overlaps some basioccipital-exoccipital joint
- overlaps some parasphenoid-basioccipital joint
- develops from some parachordal cartilage
- overlaps some basioccipital-prootic joint