42e8fc589c9b77aef9814f3804414a6f bmsap-10398.pdf f5599ddbfe4702459ce82f1df0db182bec0d5681 bmsap-10398.pdf f15b42f9b7bdb2c921bc732bf554095a152174effdb42dfaeaf46a38f677954d bmsap-10398.pdf Title: Variation morphologique et concept d’espèce en paléoanthropologie : l’exemple d’Australopithecus en Afrique australe Subject: Interpréter et comprendre la variation morphologique au sein des hominines fossiles représente l’un des défis majeurs de la paléoanthropologie. L’absence d’une définition consensuelle du concept d’espèce en paléontologie, associée à la nature fragmentaire du registre fossile, affecte notre appréciation de la diversité taxinomique des hominines fossiles. Les débats historiques autour des restes fossiles attribués à Australopithecus en Afrique australe constituent un exemple marquant de l’impact de ces questionnements sur notre compréhension actuelle de l’évolution humaine. Dès les premières découvertes, les rapports scientifiques font état d’une très forte variation morphologique au sein de cet assemblage. Les fouilles qui ont suivi ainsi que l’étude des fossiles ont depuis confirmé cette variation remarquable. Alors que certains y décèlent la présence de plusieurs espèces du genre Australopithecus, d’autres explorent des hypothèses alternatives pour tenter d’expliquer cette surprenante variation. Loin d’être anecdotique, une forte diversité taxinomique au sein de ce genre modifierait profondément notre conception des mécanismes de spéciation des hominines du Plio-Pleistocène. Dans cette synthèse, je m’attache tout d’abord à rappeler les facteurs susceptibles de jouer un rôle dans la variation morphologique au sein du registre fossile et les discussions autour du concept d’espèce en paléoanthropologie avant d’aborder l’histoire des découvertes et les études qui ont soulevé certains questionnements autour de la diversité chez Australopithecus en Afrique australe et d’examiner les facteurs qui en seraient à l’origine.Interpreting and understanding morphological variation within the fossil hominin record represent one of the major challenges in palaeoanthropology. The lack of a consensual definition of the species concept in palaeontology, together with the fragmentary nature of the fossil record, greatly impact our understanding of the fossil hominin taxonomic diversity. Historical debates around the fossil remains attributed to Australopithecus in southern Africa is an emblematic example of the influence of those questions on our understanding of human evolution. Since the earliest discoveries, scientific papers have been reporting a high degree of morphological variation within this assemblage. Since then, subsequent excavations have confirmed this outstanding variation. While some authors interpret this variation as a proof of the presence of more than one Australopithecus species, others explore alternative hypotheses to tentatively explain this variation. Far from being anecdotical, this presumed taxonomic diversity within the genus Australopithecus would substantially modify our grasp of speciation processes within Plio-Pleistocene hominins. In this synthesis, I describe the factors that play a role in morphological variation before going through the history of discoveries and studies that raised concerns and questions about the diversity within southern African Australopithecus and investigating the factors that may explain this conundrum. Keywords: Hominines,Hominins,"Berceau de l’Humanité","Cradle of Humankind",morphological variation,variation morphologique,polymorphisme,polymorphism,Plio-Pléistocène,Plio-Pleistocene Author: Amélie Beaudet Creator: OpenEdition Producer: OpenEdition PDF Server v2 CreationDate: Wed Feb 15 00:29:19 2023 CET ModDate: Wed Feb 15 00:29:19 2023 CET Tagged: no UserProperties: no Suspects: no Form: none JavaScript: no Pages: 10 Encrypted: no Page size: 595 x 841 pts Page rot: 0 File size: 1214623 bytes Optimized: no PDF version: 1.5 name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- SKRUIC+GentiumBookBasic-Italic TrueType WinAnsi yes yes yes 10 0 XZDGTI+Roboto-LightItalic TrueType WinAnsi yes yes yes 14 0 KCGYME+Roboto-Medium TrueType WinAnsi yes yes yes 18 0 UQMPQP+Roboto-Light CID TrueType Identity-H yes yes yes 22 0 WDGSRJ+Roboto-Medium CID TrueType Identity-H yes yes yes 27 0 RWJGFD+GentiumBookBasic TrueType WinAnsi yes yes yes 32 0 DBBABP+Roboto-Bold TrueType WinAnsi yes yes yes 36 0 DIGVFJ+Roboto-Light TrueType WinAnsi yes yes yes 40 0 LXOZHA+Roboto-Black TrueType WinAnsi yes yes yes 44 0 GTYULB+Cambria-Italic TrueType WinAnsi yes yes yes 72 0 NTZOTF+Cambria-BoldItalic TrueType WinAnsi yes yes yes 76 0 VVTAFY+Cambria-Bold TrueType WinAnsi yes yes yes 80 0 KTRNBY+TrebuchetMS TrueType WinAnsi yes yes yes 84 0 GRMKLW+Cambria-Bold CID TrueType Identity-H yes yes yes 88 0 VWCTYU+Cambria CID TrueType Identity-H yes yes yes 104 0 XTMDXE+Cambria TrueType WinAnsi yes yes yes 111 0 IMURPZ+TimesNewRomanPSMT TrueType WinAnsi yes yes yes 126 0 IHCFKS+Cambria-BoldItalic CID TrueType Identity-H yes yes yes 130 0 SALHHN+ConduitITC TrueType WinAnsi yes yes yes 137 0 SZVJLH+TimesNewRomanPSMT CID TrueType Identity-H yes yes yes 141 0 EPVUHU+TimesNewRomanPS-ItalicMT TrueType WinAnsi yes yes yes 148 0 VDZNLA+TimesNewRomanPS-BoldMT TrueType WinAnsi yes yes yes 152 0 GSAQID+TimesNewRomanPS-ItalicMT CID TrueType Identity-H yes yes yes 198 0 Jhove (Rel. 1.22.1, 2019-04-17) Date: 2023-02-17 02:36:33 CET RepresentationInformation: bmsap-10398.pdf ReportingModule: PDF-hul, Rel. 1.12.1 (2019-04-17) LastModified: 2023-02-15 09:10:04 CET Size: 1214623 Format: PDF Version: 1.5 Status: Well-Formed and valid SignatureMatches: PDF-hul MIMEtype: application/pdf PDFMetadata: Objects: 215 FreeObjects: 13 IncrementalUpdates: 1 DocumentCatalog: PageLayout: SinglePage PageMode: UseNone Info: Title: Variation morphologique et concept d’espèce en paléoanthropologie : l’exemple d’Australopithecus en Afrique australe Author: Amélie Beaudet Subject: Interpréter et comprendre la variation morphologique au sein des hominines fossiles représente l’un des défis majeurs de la paléoanthropologie. L’absence d’une définition consensuelle du concept d’espèce en paléontologie, associée à la nature fragmentaire du registre fossile, affecte notre appréciation de la diversité taxinomique des hominines fossiles. Les débats historiques autour des restes fossiles attribués à Australopithecus en Afrique australe constituent un exemple marquant de l’impact de ces questionnements sur notre compréhension actuelle de l’évolution humaine. Dès les premières découvertes, les rapports scientifiques font état d’une très forte variation morphologique au sein de cet assemblage. Les fouilles qui ont suivi ainsi que l’étude des fossiles ont depuis confirmé cette variation remarquable. Alors que certains y décèlent la présence de plusieurs espèces du genre Australopithecus, d’autres explorent des hypothèses alternatives pour tenter d’expliquer cette surprenante variation. Loin d’être anecdotique, une forte diversité taxinomique au sein de ce genre modifierait profondément notre conception des mécanismes de spéciation des hominines du Plio-Pleistocène. Dans cette synthèse, je m’attache tout d’abord à rappeler les facteurs susceptibles de jouer un rôle dans la variation morphologique au sein du registre fossile et les discussions autour du concept d’espèce en paléoanthropologie avant d’aborder l’histoire des découvertes et les études qui ont soulevé certains questionnements autour de la diversité chez Australopithecus en Afrique australe et d’examiner les facteurs qui en seraient à l’origine.Interpreting and understanding morphological variation within the fossil hominin record represent one of the major challenges in palaeoanthropology. The lack of a consensual definition of the species concept in palaeontology, together with the fragmentary nature of the fossil record, greatly impact our understanding of the fossil hominin taxonomic diversity. Historical debates around the fossil remains attributed to Australopithecus in southern Africa is an emblematic example of the influence of those questions on our understanding of human evolution. Since the earliest discoveries, scientific papers have been reporting a high degree of morphological variation within this assemblage. Since then, subsequent excavations have confirmed this outstanding variation. While some authors interpret this variation as a proof of the presence of more than one Australopithecus species, others explore alternative hypotheses to tentatively explain this variation. Far from being anecdotical, this presumed taxonomic diversity within the genus Australopithecus would substantially modify our grasp of speciation processes within Plio-Pleistocene hominins. In this synthesis, I describe the factors that play a role in morphological variation before going through the history of discoveries and studies that raised concerns and questions about the diversity within southern African Australopithecus and investigating the factors that may explain this conundrum. Keywords: Hominines,Hominins,"Berceau de l’Humanité","Cradle of Humankind",morphological variation,variation morphologique,polymorphisme,polymorphism,Plio-Pléistocène,Plio-Pleistocene Creator: OpenEdition Producer: OpenEdition PDF Server v2 CreationDate: Wed Feb 15 00:29:19 CET 2023 ModDate: Wed Feb 15 00:29:19 CET 2023 ID: 0x1bc70963a23caffe2c7cc461194c075d, 0x8a6839b49857ba8d142586f6b977ec05 Filters: FilterPipeline: FlateDecode FilterPipeline: DCTDecode Images: Image: NisoImageMetadata: FormatName: image/png ImageWidth: 600 ImageHeight: 281 ColorSpace: RGB BitsPerSample: 8 BitsPerSampleUnit: integer Filter: FlateDecode Interpolate: true Image: NisoImageMetadata: FormatName: image/png ImageWidth: 88 ImageHeight: 31 ColorSpace: RGB BitsPerSample: 8 BitsPerSampleUnit: integer Filter: FlateDecode Interpolate: true Image: NisoImageMetadata: FormatName: image/png ImageWidth: 591 ImageHeight: 153 ColorSpace: RGB BitsPerSample: 8 BitsPerSampleUnit: integer Filter: FlateDecode Interpolate: 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