A STUDY OF MICROWEAR ON CHIMPANZEE MOLARS - IMPLICATIONS FOR DENTAL MICROWEAR ANALYSIS
A STUDY OF MICROWEAR ON CHIMPANZEE MOLARS - IMPLICATIONS FOR DENTAL MICROWEAR ANALYSIS
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DOI：
10.1002/ajpa.1330590208
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发表时间：
1982-01-01
影响因子：
2.8
通讯作者：
GORDON, KD
中科院分区：
文献类型：
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作者：
GORDON, KD
最近对牙齿微磨损的研究表明，这种分析最终可能提供关于化石物种饮食的有价值的信息。到目前为止，还没有关于微磨损模式的种内可变性的背景信息。用扫描电子显微镜观察了黑猩猩磨牙牙釉质的微磨损特征。描述了模式分析的方法。咬合面上选定的部位包括由咀嚼动力的两个阶段形成的剪切面、研磨面和穿刺面。在这个黑猩猩样本中发现的微磨损模式显示出高度的规律性。斑纹相对频率、特征密度、斑纹长度和斑点直径等参数受小关节类型和磨牙位置的影响显著。个体的性别和年龄也影响一些微磨损参数，但由于样本量较小，这些发现被认为是初步的。单个物种内的微磨损可能会因生物力学因素而不是饮食因素而有所不同。还给出了由于功能和形态影响而引起的正常模式变异性的一些度量估计。这些估计应该为评估不同饮食物种之间可能发现的微磨损模式差异的重要性提供一个有用的基线。
Recent investigations of dental microwear have shown that such analyses may ultimately provide valuable information about the diets of fossil species. No background information about intraspecific variability of microwear patterns has been available until now. A scanning electron microscopy survey of microwear patterns found on occlusal enamel of chimpanzee molars is presented. Methods of pattern analysis are described. Selected sites on the occlusal surface included shearing, grinding and puncture-crushing surfaces formed by both phases of the power stroke of mastication. The microwear patterns found in this sample of chimpanzees showed a high degree of regularity. Certain parameters such as relative pit-to-striation frequencies, feature density, striation length and pit diameter were significantly affected by facet type and molar position. Sex and age of individuals also influenced some microwear parameters, but due to the small sample size these findings are considered to be preliminary. Microwear within a single species may vary because of factors that are due more to biomechanics than to diet. Some metrical estimates of normal pattern variability due to functional and morphological influences also are given. These estimates should provide a useful baseline for assessing the significance of microwear pattern differences that may be found between species of differing diets.