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首页> 外文期刊>Journal of Mammalian Evolution >Intraspecific Variation of Endocranial Structures in Extant Equus: A Prelude to Endocranial Studies in Fossil Equoids
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Intraspecific Variation of Endocranial Structures in Extant Equus: A Prelude to Endocranial Studies in Fossil Equoids

机译：现存马脑内结构的种内变异：化石类动物颅内研究的前奏

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摘要

Intraspecific variation of endocranial structures is not widely studied in most mammals, particularly fossil mammals, which are mainly represented by a few preserved crania. However, a description of this variation is necessary to be able to study fossil mammals from an ecological and phylogenetic perspective. To facilitate further analyses on fossil equoids, digital reconstructions of the cranial endocast, petrosal bone, and bony labyrinth were created based on CT scans, taken from a wild population of 12 Equus caballus przewalskii currently being monitored. Using descriptive, biometric, and morphometric analyses, an unsuspected range of intraspecific variation for 40 endocranial characters is revealed. Intraindividual variation can be further understood through the comparison of paired organs from a single individual. These results prompt cautious consideration of these characters, as well as an index for the determination of hearing abilities or encephalization quotients.
机译：在大多数哺乳动物，特别是化石哺乳动物中，颅内结构的种内变异没有得到广泛研究，其主要表现为少数保留的颅骨。但是，要能够从生态和系统发育的角度研究化石哺乳动物，就必须对此变化进行描述。为了促进对化石等位物的进一步分析，基于CT扫描创建了颅内铸件，岩骨和骨迷宫的数字重建，该重建取自目前受监视的12匹马qu przewalskii的野生种群。使用描述性，生物特征性和形态特征分析，揭示了40个颅骨特征的种内变异范围未曾怀疑。通过比较来自单个个体的配对器官，可以进一步了解个体差异。这些结果促使人们谨慎考虑这些特征，以及确定听力或脑电商的指标。

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