RT info:eu-repo/semantics/article T1 Main morphological characteristics and sexual dimorphism of hominin adult femora from the Sima de los Huesos Middle Pleistocene site (Sierra de Atapuerca, Spain) A1 Carretero Díaz, José Miguel A1 Rodríguez, Laura A1 García González, Rebeca A1 Arsuaga, Juan Luis K1 Archaic hominins K1 Lower limb K1 Middle Pleistocene K1 Paleontología K1 Paleontology AB The excellent fossil record from Sima de los Huesos (SH) includes three well-known complete adult femora and several partial specimens that have not yet been published in detail. This fossil record provides an opportunity to analyze the morphology of European pre-Neandertal adult femur and its variation with different evolution patterns. Currently, there are a minimum of five adult individuals (males or females). In this study, we compiled previously published basic anatomical and biometric characteristics of SH adult femora, emphasizing the most relevant features compared to other recent and fossil hominins. The SH femora exhibited a primitive morphological pattern common to all non-Homo sapiens femora, as well as most of the Neandertal traits. Therefore, the complete Upper Pleistocene Neandertal pattern was well-established in Middle Pleistocene ancestors long before the proper Neandertals appeared. Additionally, we highlight that the SH and Neandertal femora share some morphological traits and proportions with modern humans that hold sexual significance in our species, regardless of size. Keeping this in mind, we discussed the sex determination of the complete SH specimens and re-evaluated sex allocation in two of them. PB Wiley SN 1932-8486 YR 2023 FD 2023-10-05 LK http://hdl.handle.net/10259/9329 UL http://hdl.handle.net/10259/9329 LA eng NO The Atapuerca research project is financed by the Ministerio de Ciencia, Innovación y Universidades Grant PID2021-122355NB-C31 funded by MCIN/AEI/10.13039/501100011033 and “ERDF A way of making Europe.” Fieldwork at the Atapuerca sites is funded by the Junta de Castilla y León and Fundación Atapuerca. DS Repositorio Institucional de la Universidad de Burgos RD 04-dic-2024