The Homo floresiensis cranium (LB1):: Size, scaling, and early Homo affinities
The Homo floresiensis cranium (LB1):: Size, scaling, and early Homo affinities
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DOI：
10.1073/pnas.0710041105
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发表时间：
2008-03-25
影响因子：
11.1
通讯作者：
Wood, Bernard
中科院分区：
文献类型：
--
作者：
Gordon, Adam D.;Nevell, Lisa;Wood, Bernard
在印度尼西亚弗洛雷斯岛的晚更新世洞穴沉积物中发现的一种小型小脑人类的骨骼遗骸被分配给一个新物种，弗洛雷斯人[Brown P等人（2004）印度尼西亚弗洛雷斯晚更新世的一种新的小型身体人类。Nature 431：1055-1061]。另一种截然不同的解释是，这种材料不属于一个新的古人类分类群，而是属于一个受小头畸形影响或不受影响的小型现代人类群体。争论主要集中在模式标本LB 1的颅内腔的大小和形状上，很少关注LB 1颅骨和后颅骨的其他部分提供的形态学证据，迄今为止还没有研究解决缩放如何影响像LB 1这样的小型颅骨和现代人类更大的颅骨之间的形状比较的问题。我们发现，无论是否占其小的颅骨尺寸的影响，外部颅骨形态的LB 1颅骨不能容纳在一个大的全球样本的正常现代人类颅骨。相反，多变量分析显示，LB 1的形状与现代人的形状显著不同，它与广义直立人的形状相似，在较小程度上与能人相似。我们的研究结果是一致的假设，表明梁布样本代表了一个小的人口密切相关的早期H。直立山L.从东非和/或Dmanisi或H.能人
The skeletal remains of a diminutive small-brained hominin found in Late Pleistocene cave deposits on the island of Flores, Indonesia were assigned to a new species, Homo floresiensis [Brown P, et al. (2004) A new small-bodied hominin from the Late Pleistocene of Flores, Indonesia. Nature 431: 1055-1061]. A dramatically different interpretation is that this material belongs not to a novel hominin taxon but to a population of small-bodied modern humans affected, or unaffected, by microcephaly. The debate has primarily focused on the size and shape of the endocranial cavity of the type specimen, LB1, with less attention being paid to the morphological evidence provided by the rest of the LB1 cranium and postcranium, and no study thus far has addressed the problem of how scaling would affect shape comparisons between a diminutive cranium like LB1 and the much larger crania of modern humans. We show that whether or not the effects of its small cranial size are accounted for, the external cranial morphology of the LB1 cranium cannot be accommodated within a large global sample of normal modern human crania. instead, the shape of LB1, which is shown by multivariate analysis to differ significantly from that of modern humans, is similar to that of Homo erectus sensu lato, and, to a lesser extent, Homo habilis. Our results are consistent with hypotheses that suggest the Liang Bua specimens represent a diminutive population closely related to either early H. erectus s. l. from East Africa and/or Dmanisi or to H. habilis.