A comparative Study of Frontal Bone Morphology Among Pleistocene Hominin Fossils Group: A Study on Eyasi Hominin (EH6) Frontal Bone

Abstract

Features of the frontal bone and the supraorbital torus are conventionally used to distinguish fossil hominin groups. The study examines and measures five (5) morphological variables of EH-06, and then compares with published and unpublished data of the morphologies and measurements of eighteen (18) hominin remains from Africa, Asia and the Near East, dating from early- to late Pleistocene. Using a digital calliper, the morphological variables measured include: 1) supra orbital torus thickness (central and lateral), 2) minimum frontal breadth, 3) maximum frontal breadth, 4) biorbital chord and 5) post orbital constriction index (calculated as: maximum frontal breadth x 100/bizygomatic breadth). The results indicate that EH-06 exhibits features of Homo erectus and archaic Homo sapiens, but more moving towards frontal morphological features of anatomically-modern Homo sapiens.