Comparative Anatomy of the Bony Labyrinth (Inner Ear) of Placental Mammals.
Comparative Anatomy of the Bony Labyrinth (Inner Ear) of Placental Mammals.
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DOI：
10.1371/journal.pone.0066624
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Ekdale EG
中科院分区：
文献类型：
--
作者：
Ekdale EG
变异是一种自然发生的现象，在形态学的各个层面都可以观察到，从DNA分子的解剖变异到整个生物体之间的总体变异。东欧地区的结构也不例外。本文利用高分辨率x射线计算机断层扫描（CT）构建的数字模型，记录了胎盘哺乳动物内耳区域广泛的形态多样性。描述涵盖了主要的胎盘枝，线性，角度和体积尺寸的报道。迷宫的大小与个体的整体体重有关，因此大型哺乳动物的迷宫绝对更大。水生物的三条半规管平均弧度半径与体质量之比明显低于相关陆生类群，水生哺乳动物前庭器官的体积百分比也倾向于小于陆生类群。骨迷路的各个方面具有系统发育上的信息，包括鲸目动物的前庭减少，腔形啮齿类动物的高耳蜗螺旋，与鲸目动物和食肉动物的后耳蜗相比，外侧半规管平面的位置较低，以及灵长类动物的低耳蜗长径比。所提出的形态学描述为许多胎盘哺乳动物分支的内耳解剖学增加了一个广泛的基线，其中许多骨迷路的结构在很大程度上是未知的。这些数据补充了越来越多关于哺乳动物骨迷路结构的生理和系统发育意义的文献，并为未来脊椎动物耳朵的进化和功能研究提供了数据来源。
Variation is a naturally occurring phenomenon that is observable at all levels of morphology, from anatomical variations of DNA molecules to gross variations between whole organisms. The structure of the otic region is no exception. The present paper documents the broad morphological diversity exhibited by the inner ear region of placental mammals using digital endocasts constructed from high-resolution X-ray computed tomography (CT). Descriptions cover the major placental clades, and linear, angular, and volumetric dimensions are reported. The size of the labyrinth is correlated to the overall body mass of individuals, such that large bodied mammals have absolutely larger labyrinths. The ratio between the average arc radius of curvature of the three semicircular canals and body mass of aquatic species is substantially lower than the ratios of related terrestrial taxa, and the volume percentage of the vestibular apparatus of aquatic mammals tends to be less than that calculated for terrestrial species. Aspects of the bony labyrinth are phylogenetically informative, including vestibular reduction in Cetacea, a tall cochlear spiral in caviomorph rodents, a low position of the plane of the lateral semicircular canal compared to the posterior canal in Cetacea and Carnivora, and a low cochlear aspect ratio in Primatomorpha. The morphological descriptions that are presented add a broad baseline of anatomy of the inner ear across many placental mammal clades, for many of which the structure of the bony labyrinth is largely unknown. The data included here complement the growing body of literature on the physiological and phylogenetic significance of bony labyrinth structures in mammals, and they serve as a source of data for future studies on the evolution and function of the vertebrate ear.
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哺乳动物形态的网络数据库和胎盘系统发育的重新分析。
影响因子：
3.4
作者：
Asher RJ
通讯作者：
Asher RJ
影响因子：
56.9
作者：
Asher, RJ;Meng, J;Novacek, MJ
通讯作者：
Novacek, MJ
影响因子：
64.8
作者：
Alonso, PD;Milner, AC;Rowe, TB
通讯作者：
Rowe, TB
影响因子：
64.8
作者：
ARCHIBALD, JD
通讯作者：
ARCHIBALD, JD
DOI：
10.1002/ar.21298
发表时间：
2011-02-01
影响因子：
2
作者：
Armstrong, Stephanie D.;Bloch, Jonathan I.;Silcox, Mary T.
通讯作者：
Silcox, Mary T.