It was described based on an incomplete skull found in Italy, which lacks the rear and left side, but had the back side.

It consists of an incomplete skull and other postcranial fragments.

The type species, H. calathocercos, was described from an incomplete skull and postcranial material.

Mr. Zabroski picked up the incomplete skull, which was missing pretty much everything below the eye sockets.

It is only known from an incomplete skull.

It is known only from a series of incomplete skulls.

Additional remains, consisting of the incomplete skull and skeleton of a juvenile, were described in 1992.

Homo rudolfensis refers to a single, incomplete skull from Kenya.

It is known from a single incomplete skull from Kenya.

The fossil has the form of an incomplete skull and fragments of post-cranial material.