System Glossary
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Definition of Term

anterior fontanelle
(English) On the elasmobranch neurocranium, an aperture on the anterodorsomedial surface, usually at the rear of the ethmoid region and forming a passage into the internal cranial cavity. It is closed by a tough membrane, varies tremendously in shape, and may be pinched off by the medially expanded orbits in a few sharks. (See also: fontanelle, neurocranium)

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