belophragm
the median ossification of the basisphenoid

Dictionary of ichthyology. 2009.

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  • basisphenoid — the small, Y shaped, deep, endochondral cranial bone ventrally covered by the parasphenoid and medial to the pterosphenoids forming part of the floor of the neurocranium and the base of the posterior myodome. The bone ossifies from the medial… …   Dictionary of ichthyology

  • os basisphenoideum — (plural ossa basipsphenoidea)) basisphenoid (the small, Y shaped, deep, endochondral cranial bone ventrally covered by the parasphenoid and medial to the pterosphenoids forming part of the floor of the neurocranium and the base of the posterior… …   Dictionary of ichthyology

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