Mechanisms Underlying Variations in the Dentition Asymmetry of Asian Snail-Eating Snakes
Mechanisms Underlying Variations in the Dentition Asymmetry of Asian Snail-Eating Snakes
复制标题
亚洲食螺蛇牙列不对称变异的机制
DOI：
10.1007/978-981-19-1342-6_9
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Hoso Masaki
中科院分区：
文献类型：
--
作者：
Vu Trieu-Duc;Iwasaki Yuki;Oshima Kenshiro;Chiu Ming-Tzu;Nikaido Masato;Okada Norihiro;Hoso Masaki
两侧对称的外部形态通常具有特征。一个值得注意的例外是亚洲食螺蛇科的下颌牙齿。除了一种专门吃鼻涕虫的蛇外，所有的蛇的右下颌骨上的牙齿都比左下颌骨上的牙齿多，这是为了专门捕食右侧的大多数陆生蜗牛。齿系不对称的程度因物种而异，预计将由稳定的自然选择对自然猎物的最佳摄食性能，广泛见于适应性质量性状。在这项研究中，我综述了种间的齿系不对称性的变化及其与猎物。接下来，作为一个测试案例，我研究了个体差异之间的关联，在齿系不对称的日本帕瑞斯岩崎蛇，和各种蜗牛猎物的喂养性能。最后，我展示了种内和种间变异的地理模式。我讨论的问题持续有关牙列不对称。
The Bilateria are generally characterized by lateral symmetry of external morphology. A remarkable exception is the mandibular teeth of Asian snail-eating snakes in the family Pareidae. All the pareid snakes, except a slug-eating specialist species, have more teeth on the right mandible than on the left, for feeding specialization on the dextral majority of land snails. The extent of the dentition asymmetry varies among species and is expected to be determined by stabilizing natural selection for optimal feeding performance on natural prey, as is widely seen in adaptive qualitative traits. In this study, I reviewed the interspecific variation in dentition asymmetry and its association with prey. Next, as a test case, I examined the association between individual variation in the dentition asymmetry of a Japanese pareid snake,Pareas iwasakii, and feeding performance on a variety of snail prey. Finally, I showed a geographic pattern in intraspecific and interspecific variation. I discuss the questions persisting regarding dentition asymmetry.