The suprainiac fossa is an elliptical depression on the

occiput The occipital bone () is a cranial dermal bone and the main bone of the occiput (back and lower part of the skull). It is trapezoidal in shape and curved on itself like a shallow dish. The occipital bone lies over the occipital lobes of the ...

above the superior

nuchal line The nuchal lines are four curved lines on the external surface of the occipital bone: * The upper, often faintly marked, is named the highest nuchal line, but is sometimes referred to as the Mempin line or linea suprema, and it attaches to the ep ...

, or inion, or a dent in the back of the head. Suprainiac fossae were common anatomical features of Neanderthals but are rare in modern Humans.

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