Canine sexual dimorphism in Ardipithecus ramidus was nearly human-like
文献类型：期刊论文
| 作者 | Suwa, Gen13; Sasaki, Tomohiko12; Semaw, Sileshi10,11; Rogers, Michael J.9; Simpson, Scott W.8; Kunimatsu, Yutaka7; Nakatsukasa, Masato6; Kono, Reiko T.5; Zhang, Yingqi4; Beyene, Yonas3 |
| 刊名 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
 |
| 出版日期 | 2021-12-07 |
| 卷号 | 118期号:49页码:11 |
| ISSN号 | 0027-8424 |
| 关键词 | canine dimorphism Bayesian estimate Ardipithecus ramidus Australopithecus Homo |
| DOI | 10.1073/pnas.2116630118 |
| 通讯作者 | Suwa, Gen(gsuwa@um.u-tokyo.ac.jp) |
| 英文摘要 | Body and canine size dimorphism in fossils inform sociobehavioral hypotheses on human evolution and have been of interest since Darwin's famous reflections on the subject. Here, we assemble a large dataset of fossil canines of the human clade, including all available Ardipithecus ramidus fossils recovered from the Middle Awash and Gona research areas in Ethiopia, and systematically examine canine dimorphism through evolutionary time. In particular, we apply a Bayesian probabilistic method that reduces bias when estimating weak and moderate levels of dimorphism. Our results show that Ar. ramidus canine dimorphism was significantly weaker than in the bonobo, the least dimorphic and behaviorally least aggressive among extant great apes. Average male-to-female size ratios of the canine in Ar. ramidus are estimated as 1.06 and 1.13 in the upper and lower canines, respectively, within modern human population ranges of variation. The slightly greater magnitude of canine size dimorphism in the lower than in the upper canines of Ar. ramidus appears to be shared with early Australopithecus, suggesting that male canine reduction was initially more advanced in the behaviorally important upper canine. The available fossil evidence suggests a drastic size reduction of the male canine prior to Ar. ramidus and the earliest known members of the human clade, with little change in canine dimorphism levels thereafter. This evolutionary pattern indicates a profound behavioral shift associated with comparatively weak levels of male aggression early in human evolution, a pattern that was subsequently shared by Australopithecus and Homo. |
| WOS关键词 | MONKEYS BRACHYTELES-ARACHNOIDES ; EARLY HOMINID ; LATE MIOCENE ; MIDDLE AWASH ; AUSTRALOPITHECUS-ANAMENSIS ; POLYMORPHIC ASPECTS ; ANTERIOR DENTITION ; LUKEINO FORMATION ; SIZE DIMORPHISM ; PROJECT AREA |
| 资助项目 | Japan Society for the Promotion of Science (Kakenhi)[24000015] ; Japan Society for the Promotion of Science (Kakenhi)[18H04007] ; L. S. B. Leakey Foundation ; European Union ; NSF[SBR-9910974] ; NSF[RHOI BCS 0321893] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB26000000] |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| 出版者 | NATL ACAD SCIENCES |
| WOS记录号 | WOS:000730583000017 |
| 资助机构 | Japan Society for the Promotion of Science (Kakenhi) ; L. S. B. Leakey Foundation ; European Union ; NSF ; Strategic Priority Research Program of the Chinese Academy of Sciences |
| 源URL | [http://119.78.100.205/handle/311034/19124]  |
| 专题 | 古脊椎动物与古人类研究所_图书馆1 |
| 通讯作者 | Suwa, Gen |
| 作者单位 | 1.Univ Calif Berkeley, Dept Integrat Biol, Berkeley, CA 94720 USA 2.Rift Valley Res Serv, Addis Ababa, Ethiopia 3.French Ctr Ethiopian Studies, Addis Ababa, Ethiopia 4.Chinese Acad Sci, Key Lab Vertebrate Evolut & Human Origins, Inst Vertebrate Paleontol & Paleoanthropol, Beijing 100044, Peoples R China 5.Keio Univ, Fac Letters, Yokohama, Kanagawa 2238521, Japan 6.Kyoto Univ, Lab Phys Anthropol, Kyoto 6068502, Japan 7.Ryukoku Univ, Dept Business Adm, Kyoto 6128577, Japan 8.Case Western Reserve Univ, Dept Anat, Sch Med, Cleveland, OH 44106 USA 9.Southern Connecticut State Univ, Dept Anthropol, New Haven, CT 06515 USA 10.Stone Age Inst, Gosport, IN 47408 USA |
| 推荐引用方式 GB/T 7714 | Suwa, Gen,Sasaki, Tomohiko,Semaw, Sileshi,et al. Canine sexual dimorphism in Ardipithecus ramidus was nearly human-like[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2021,118(49):11. |
| APA | Suwa, Gen.,Sasaki, Tomohiko.,Semaw, Sileshi.,Rogers, Michael J..,Simpson, Scott W..,...&White, Tim D..(2021).Canine sexual dimorphism in Ardipithecus ramidus was nearly human-like.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,118(49),11. |
| MLA | Suwa, Gen,et al."Canine sexual dimorphism in Ardipithecus ramidus was nearly human-like".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 118.49(2021):11. |
入库方式： OAI收割
来源：古脊椎动物与古人类研究所
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