ENAMEL STRUCTURE OF ARCTOID CARNIVORA: AMPHICYONIDAE, URSIDAE, PROCYONIDAE, AND MUSTELIDAE
ENAMEL STRUCTURE OF ARCTOID CARNIVORA: AMPHICYONIDAE, URSIDAE, PROCYONIDAE, AND MUSTELIDAE
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DOI：
10.1644/1545-1542(2001)082
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发表时间：
2001-05
期刊：
影响因子：
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通讯作者：
Clara Stefen
中科院分区：
文献类型：
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作者：
Clara Stefen
摘要：用光学和扫描电子显微镜研究了几种化石和近代食肉动物的牙釉质。与其他食肉动物一样，我们观察到 3 种类型的亨特-施雷格带 (HSB)：波状、锐角和锯齿状 HSB，它们的 3 维复杂性有所不同。弧形食肉动物的数据被用来检验锯齿状 HSB 多次进化以抵抗高拉伸应力下牙釉质破裂的假设。 HSB 的分布（除了草食性大熊猫 Ailuropoda 中存在之字形 HSB 之外）支持了这一假设。
Abstract Enamel of several fossil and recent arctoid carnivores was studied with light and scanning electron microscopy. As in other carnivorans, 3 types of Hunter–Schreger bands (HSB) were observed: undulating, acute-angled, and zigzag HSB, which differ in their 3-dimensional complexity. Data on arctoid carnivores were used to test the hypothesis that zigzag HSB evolved multiple times to resist cracking of the enamel under high tensile stress. Distribution of HSB, except presence of zigzag HSB in the herbivorous panda, Ailuropoda, supported the hypothesis.