A SINGLE LINEAGE IN EARLY PLEISTOCENE HOMO: SIZE VARIATION CONTINUITY IN EARLY PLEISTOCENE HOMO CRANIA FROM EAST AFRICA AND GEORGIA
Identifieur interne : 000971 ( Istex/Checkpoint ); précédent : 000970; suivant : 000972A SINGLE LINEAGE IN EARLY PLEISTOCENE HOMO: SIZE VARIATION CONTINUITY IN EARLY PLEISTOCENE HOMO CRANIA FROM EAST AFRICA AND GEORGIA
Auteurs : Adam P. Van Arsdale [États-Unis] ; Milford H. Wolpoff [États-Unis]Source :
- Evolution [ 0014-3820 ] ; 2013-03.
Descripteurs français
- Wicri :
- geographic : Kenya.
English descriptors
- KwdEn :
- Anthropol, Average index, Average pairwise variance values, Boisei, Boisei specimens, Cranial, Cranial sample, Cranium, Dimorphism, Dmanisi, Early homo, Early homo crania, East africa, Erectus, Evol, Evolution march, Evolutionary change, Evolutionary relationships, Feibel, Fossil, Gathogo, Genus homo, Gorge, Habilis, Hominid, Homo, Homo erectus, Homo habilis, Homo lineage, Homo sample, Human evolution, Individual measurement comparisons, Kenya, Koobi, Koobi fora, Leakey, Lineage, Lordkipanidze, Measurement comparisons, Null hypothesis, Olduvai, Olduvai gorge, Pairwise, Pairwise comparisons, Pairwise difference, Pairwise measurement comparisons, Pairwise specimen comparisons, Phys, Relative difference, Rightmire, Sexual dimorphism, Single lineage, Spoor, Suwa, Time interval, Time intervals, Time period, Tobias, Turkana, Variance, Vekua.
- Teeft :
- Anthropol, Average index, Average pairwise variance values, Boisei, Boisei specimens, Cranial, Cranial sample, Cranium, Dimorphism, Dmanisi, Early homo, Early homo crania, East africa, Erectus, Evol, Evolution march, Evolutionary change, Evolutionary relationships, Feibel, Fossil, Gathogo, Genus homo, Gorge, Habilis, Hominid, Homo, Homo erectus, Homo habilis, Homo lineage, Homo sample, Human evolution, Individual measurement comparisons, Kenya, Koobi, Koobi fora, Leakey, Lineage, Lordkipanidze, Measurement comparisons, Null hypothesis, Olduvai, Olduvai gorge, Pairwise, Pairwise comparisons, Pairwise difference, Pairwise measurement comparisons, Pairwise specimen comparisons, Phys, Relative difference, Rightmire, Sexual dimorphism, Single lineage, Spoor, Suwa, Time interval, Time intervals, Time period, Tobias, Turkana, Variance, Vekua.
Abstract
The relationship between Homo habilis and early African Homo erectus has been contentious because H. habilis was hypothesized to be an evolutionary stage between Australopithecus and H. erectus, more than a half‐century ago. Recent work re‐dating key African early Homo localities and the discovery of new fossils in East Africa and Georgia provide the opportunity for a productive re‐evaluation of this topic. Here, we test the hypothesis that the cranial sample from East Africa and Georgia represents a single evolutionary lineage of Homo spanning the approximately 1.9–1.5 Mya time period, consisting of specimens attributed to H. habilis and H. erectus. To address issues of small sample sizes in each time period, and uneven representation of cranial data, we developed a novel nonparametric randomization technique based on the variance in an index of pairwise difference from a broad set of fossil comparisons. We fail to reject the hypothesis of a single lineage this period by identifying a strong, time‐dependent pattern of variation throughout the sequence. These results suggest the need for a reappraisal of fossil evidence from other regions within this time period and highlight the critical nature of the Plio‐Pleistocene boundary for understanding the early evolution of the genus Homo.
Url:
DOI: 10.1111/j.1558-5646.2012.01824.x
Affiliations:
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Wolpoff</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><placeName><region type="state">Michigan</region></placeName><wicri:cityArea>Department of Anthropology, University of Michigan, 1085 South University Avenue, Ann Arbor</wicri:cityArea></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">Evolution</title><title level="j" type="alt">EVOLUTION</title><idno type="ISSN">0014-3820</idno><idno type="eISSN">1558-5646</idno><imprint><biblScope unit="vol">67</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="841">841</biblScope><biblScope unit="page" to="850">850</biblScope><biblScope unit="page-count">10</biblScope><publisher>Blackwell Publishing Inc</publisher><pubPlace>Malden, USA</pubPlace><date type="published" when="2013-03">2013-03</date></imprint><idno type="ISSN">0014-3820</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0014-3820</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Anthropol</term><term>Average index</term><term>Average pairwise variance values</term><term>Boisei</term><term>Boisei specimens</term><term>Cranial</term><term>Cranial sample</term><term>Cranium</term><term>Dimorphism</term><term>Dmanisi</term><term>Early homo</term><term>Early homo crania</term><term>East africa</term><term>Erectus</term><term>Evol</term><term>Evolution march</term><term>Evolutionary change</term><term>Evolutionary relationships</term><term>Feibel</term><term>Fossil</term><term>Gathogo</term><term>Genus homo</term><term>Gorge</term><term>Habilis</term><term>Hominid</term><term>Homo</term><term>Homo erectus</term><term>Homo habilis</term><term>Homo lineage</term><term>Homo sample</term><term>Human evolution</term><term>Individual measurement comparisons</term><term>Kenya</term><term>Koobi</term><term>Koobi fora</term><term>Leakey</term><term>Lineage</term><term>Lordkipanidze</term><term>Measurement comparisons</term><term>Null hypothesis</term><term>Olduvai</term><term>Olduvai gorge</term><term>Pairwise</term><term>Pairwise comparisons</term><term>Pairwise difference</term><term>Pairwise measurement comparisons</term><term>Pairwise specimen comparisons</term><term>Phys</term><term>Relative difference</term><term>Rightmire</term><term>Sexual dimorphism</term><term>Single lineage</term><term>Spoor</term><term>Suwa</term><term>Time interval</term><term>Time intervals</term><term>Time period</term><term>Tobias</term><term>Turkana</term><term>Variance</term><term>Vekua</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Anthropol</term><term>Average index</term><term>Average pairwise variance values</term><term>Boisei</term><term>Boisei specimens</term><term>Cranial</term><term>Cranial sample</term><term>Cranium</term><term>Dimorphism</term><term>Dmanisi</term><term>Early homo</term><term>Early homo crania</term><term>East africa</term><term>Erectus</term><term>Evol</term><term>Evolution march</term><term>Evolutionary change</term><term>Evolutionary relationships</term><term>Feibel</term><term>Fossil</term><term>Gathogo</term><term>Genus homo</term><term>Gorge</term><term>Habilis</term><term>Hominid</term><term>Homo</term><term>Homo erectus</term><term>Homo habilis</term><term>Homo lineage</term><term>Homo sample</term><term>Human evolution</term><term>Individual measurement comparisons</term><term>Kenya</term><term>Koobi</term><term>Koobi fora</term><term>Leakey</term><term>Lineage</term><term>Lordkipanidze</term><term>Measurement comparisons</term><term>Null hypothesis</term><term>Olduvai</term><term>Olduvai gorge</term><term>Pairwise</term><term>Pairwise comparisons</term><term>Pairwise difference</term><term>Pairwise measurement comparisons</term><term>Pairwise specimen comparisons</term><term>Phys</term><term>Relative difference</term><term>Rightmire</term><term>Sexual dimorphism</term><term>Single lineage</term><term>Spoor</term><term>Suwa</term><term>Time interval</term><term>Time intervals</term><term>Time period</term><term>Tobias</term><term>Turkana</term><term>Variance</term><term>Vekua</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Kenya</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The relationship between Homo habilis and early African Homo erectus has been contentious because H. habilis was hypothesized to be an evolutionary stage between Australopithecus and H. erectus, more than a half‐century ago. Recent work re‐dating key African early Homo localities and the discovery of new fossils in East Africa and Georgia provide the opportunity for a productive re‐evaluation of this topic. Here, we test the hypothesis that the cranial sample from East Africa and Georgia represents a single evolutionary lineage of Homo spanning the approximately 1.9–1.5 Mya time period, consisting of specimens attributed to H. habilis and H. erectus. To address issues of small sample sizes in each time period, and uneven representation of cranial data, we developed a novel nonparametric randomization technique based on the variance in an index of pairwise difference from a broad set of fossil comparisons. We fail to reject the hypothesis of a single lineage this period by identifying a strong, time‐dependent pattern of variation throughout the sequence. These results suggest the need for a reappraisal of fossil evidence from other regions within this time period and highlight the critical nature of the Plio‐Pleistocene boundary for understanding the early evolution of the genus Homo.</div></front></TEI><affiliations><list><country><li>États-Unis</li></country><region><li>Massachusetts</li><li>Michigan</li></region></list><tree><country name="États-Unis"><region name="Massachusetts"><name sortKey="Van Arsdale, Adam P" sort="Van Arsdale, Adam P" uniqKey="Van Arsdale A" first="Adam P." last="Van Arsdale">Adam P. Van Arsdale</name></region><name sortKey="Van Arsdale, Adam P" sort="Van Arsdale, Adam P" uniqKey="Van Arsdale A" first="Adam P." last="Van Arsdale">Adam P. Van Arsdale</name><name sortKey="Wolpoff, Milford H" sort="Wolpoff, Milford H" uniqKey="Wolpoff M" first="Milford H." last="Wolpoff">Milford H. Wolpoff</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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