Parietal Foramen


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Related to Parietal Foramen: mastoid foramen, Emissary veins
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Parietal Foramen

 

the medial foramen between the parietal or frontal bones for the eyelike pineal body; it is characteristic of ancient lower vertebrates, including reptiles. It has been preserved in the tuatara, in many lizards, and in such fishes as sheatfish and fishes of the family Acipenseridae. In ancient armored fishes, the parietal foramen could be paired to correspond to two eyelike organs, the pineal body and the epiphysis.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.