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      Ledi-Geraru strikes again: Morphological affinities of the LD 350-1 mandible with early Homo

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          Abstract

          Abstract The origins of the genus Homo have been a focus of much debate in the paleoanthropological literature due to its importance in understanding the evolutionary trajectories that led to the appearance of archaic humans and our species. On the level of taxonomic classification, the controversies surrounding the origins of Homo are the result of lack of clear classification criteria that separate our genus from australopiths, given the general similarities observed between fossils ascribed to late australopiths and early Homo. The challenge in finding clear autapomorphies for Homo has even led to debates about the classification of Homo habilis and Homo rudolfensis as part of our genus. These debates are further complicated by the scarcity of fossils in the timeframe of appearance of our genus, making any fossils dated to between 3.0 and 2.5 Ma of particular relevance in the context of this discussion. The Ledi-Geraru mandible is one such fossils, which has called the attention of researchers due to its combination of primitive traits seen in Australopithecus and derived traits observed in later Homo. Despite being fragmented and poorly preserved, it is one of the key fossil specimens available from the period mentioned above.

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          Most cited references14

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          R: A language and environement for statistical computing

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            Australopithecus sediba: a new species of Homo-like australopith from South Africa.

            Despite a rich African Plio-Pleistocene hominin fossil record, the ancestry of Homo and its relation to earlier australopithecines remain unresolved. Here we report on two partial skeletons with an age of 1.95 to 1.78 million years. The fossils were encased in cave deposits at the Malapa site in South Africa. The skeletons were found close together and are directly associated with craniodental remains. Together they represent a new species of Australopithecus that is probably descended from Australopithecus africanus. Combined craniodental and postcranial evidence demonstrates that this new species shares more derived features with early Homo than any other australopith species and thus might help reveal the ancestor of that genus.
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              ggplot2: elegenat graphics for data analysis

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                Author and article information

                Journal
                aabc
                Anais da Academia Brasileira de Ciências
                An. Acad. Bras. Ciênc.
                Academia Brasileira de Ciências (Rio de Janeiro, RJ, Brazil )
                0001-3765
                1678-2690
                2023
                : 95
                : suppl 1
                : e20230032
                Affiliations
                [2] São Paulo São Paulo orgnameInstituto Butantan orgdiv1Laboratório de Parasitologia Brazil
                [1] São Paulo São Paulo orgnameUniversidade de São Paulo orgdiv1Instituto de Estudos Avançados Brazil
                [3] Columbus Ohio orgnameOhio State University orgdiv1Department of Anthropology United States
                Article
                S0001-37652023000201802 S0001-3765(23)09500001802
                10.1590/0001-3765202320230032
                71d76068-7663-466a-abff-982d77c7b4a7

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 16 January 2023
                : 05 March 2023
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 14, Pages: 0
                Product

                SciELO Brazil

                Categories
                Social Sciences

                Australopithecus afarensis,Homo sp,Plio-Pleistocene hominins,Principal Component analysis

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