Explanation for spheno-ethmoid contact on the organ-crowded hominoid anterior cranial floor

The anterior cranial floor is variably configured in primates. The [sphenoid and ethmoid bones contact each other](https://www.worldcat.org/title/mans-place-among-the-mammals/oclc/1463021) in strepsirrhines, orangutans, and modern humans, whereas a [horizontal plate of frontal bone](https://www....

By Robert McCarthy