期刊
JOURNAL OF HUMAN EVOLUTION
卷 46, 期 6, 页码 647-653出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jhevol.2004.02.005
关键词
Homo erectus; melka kunture; Garba IV; enamel dysplasia; amelogenesis imperfecta
The teeth of the Homo erectus child (Garba IV) recovered from Melka Kunture Ethiopia and dated to 1.5 Ma are characterized by generalized enamel dysplasia, reduced enamel radio-opacity, and severe attrition. This combination of features is found in a large group of hereditary, generalized enamel dysplasias known as amelogenesis imperfecta (AI). SEM studies carried out on epoxy replicas of teeth from the Garba IV child, confirmed that the defects noted were developmental and not due to diagenesis. The enamel prism arrangement is abnormal and there are deep vertical furrows lacking enamel on both buccal and lingual surfaces of all molars. The lesions differ from those characteristic of linear enamel hypoplasia that form discrete horizontal lesions or pits within otherwise normal enamel. We propose that the Garba IV child is the earliest example of Al and provides a link between palaeoanthropology and molecular biology in investigations of the evolutionary history of genetic disorders. (C) 2004 Elsevier Ltd. All rights reserved.
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