Paleobiological Implications of the Ardipithecus ramidus Dentition
Paleobiological Implications of the Ardipithecus ramidus Dentition
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DOI：
10.1126/science.1175824
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发表时间：
2009-10
期刊：
影响因子：
56.9
通讯作者：
G. Suwa;Reiko T. Kono;S. Simpson;B. Asfaw;C. Lovejoy;T. White
中科院分区：
文献类型：
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作者：
G. Suwa;Reiko T. Kono;S. Simpson;B. Asfaw;C. Lovejoy;T. White
中海岸Ardipithecus ramidus样本包括超过145颗牙齿，包括相关的上颌组和下颌组。这些有助于揭示人类进化的最早阶段。阿。雷米德斯缺乏南方古猿的犬后巨齿。它的磨牙有较薄的牙釉质，在功能上不如南方古猿的牙釉质耐用，但缺乏与成熟果实有关的薄牙釉质的派生潘氏图案。这是AR。雷米迪斯的牙齿形态和磨损模式与部分陆生的杂食性/食果性生态位一致。分析表明，ARA-VP-6/500骨架为雌性，Ar。在犬类的大小和形状上，雷米德斯几乎是单一的。犬齿/下第三前磨牙复合体表明，在原始人进化的早期，犬齿的大小和研磨能力有所减小，这可能是由于针对雄性上犬科动物的选择所致。
The Middle Awash Ardipithecus ramidus sample comprises over 145 teeth, including associated maxillary and mandibular sets. These help reveal the earliest stages of human evolution. Ar. ramidus lacks the postcanine megadontia of Australopithecus. Its molars have thinner enamel and are functionally less durable than those of Australopithecus but lack the derived Pan pattern of thin occlusal enamel associated with ripe-fruit frugivory. The Ar. ramidus dental morphology and wear pattern are consistent with a partially terrestrial, omnivorous/frugivorous niche. Analyses show that the ARA-VP-6/500 skeleton is female and that Ar. ramidus was nearly monomorphic in canine size and shape. The canine/lower third premolar complex indicates a reduction of canine size and honing capacity early in hominid evolution, possibly driven by selection targeted on the male upper canine.