overlaps OBO_REL:part_of (UNDECLARED) sphenoid region olfactory region parasphenoid Dermal bone that forms part of the base of the skull and the lateral walls of the braincase through its ascending processes. It may articulate with the vomer anteriorly, the prootics and exoccipitals laterally, and the basioccipital posteriorly. The parasphenoid is an elongate median bone. TAO:0000561 teleost_anatomy dermatocranium orbital region neurocranium parasphenoid-basioccipital joint parasphenoid-pterosphenoid joint dermal bone