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skull shark

QuestionAnswer
Rostrum
rostral fenestra open ventrally
epiphyseal foramen just behind the rostrum on the top of the skull
otic capsule back of skull just lateral to midline
orbit
preorbital process ridge at the front of the orbit
supraorbital crest ridge at the top of the orbit
postorbital process ridge behind the orbit
basal plate large flat plate posterior section of the skull
vagal foramen caudal section of the skull just lateral to foramen magnum
glossopharyngeal foramen caudal section of the skull most lateral foramina
foramen magnum canal for the spinal cord
occipital condyle just ventral and lateral to foramen magnum articulate with the first trunk vertebra
branchial arches basibranchials: center base hypobranchials: branch off basi- ceratobranchial: ventral rods posteriorly oriented epibranchial: curve dorsally from cerato- pharyngobranchial: terminates the arch dorsally
hyoid arch basihyal: central section paired ceratohyal: lateral section posteriorly oriented paired hyomandibulae: lateral most projection terminates hyoid arch
meckel's cartilage lower jaw skeleton
palatoquadrate cartilage quadrate process: lateral immediately anterior to arches orbital process: projection nearest midline
homodont teeth
Created by: jebeard