Insights into the lower torso in late Miocene hominoidOreopithecus bambolii
Publication
, Journal Article
Hammond, AS; Rook, L; Anaya, AD; Cioppi, E; Costeur, L; Moyà-Solà, S; Almécija, S
Published in: Proceedings of the National Academy of Sciences
(8.3–6.7 million years old) is the latest known hominoid from Europe, dating to approximately the divergence time of the-hominin lineages. Despite being the most complete nonhominin hominoid in the fossil record, theskeleton IGF 11778 has been, for decades, at the center of intense debate regarding the species’ locomotor behavior, phylogenetic position, insular paleoenvironment, and utility as a model for early hominin anatomy. Here we investigate features of the IGF 11778 pelvis and lumbar region based on torso preparations and supplemented by othermaterial. We correct several crucial interpretations relating to the IGF 11778 anterior inferior iliac spine and lumbar vertebrae structure and identifications. We find that features of the early hominintorso that are argued to have permitted both lordosis and pelvic stabilization during upright walking are not present in. However,also lacks the complete reorganization for torso stiffness seen in extant great apes (i.e., living members of the Hominidae), and is more similar to large hylobatids in certain aspects of torso form. We discuss the major implications of thelower torso anatomy and howinforms scenarios of hominoid evolution.
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