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Unification of Criteria for Distinguishing Morphotypes of Cheek Teeth in Lemmings (Lemmini, Arvicolinae, Rodentia)

机译:区分小动物脸颊牙齿形态标准的统一(Lemmini,Arvicolinae,Rodentia)

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摘要

This paper summarizes the data on morphotype dental patterns in recent lemmings (Lemmini) and their earliest presumed ancestors based on analysis of both the existing literature and zoological collections. The criteria for distinguishing the morphotypes are unified, and four metrics are proposed for assessment: (1)the occlusal surface complexity, (2) the regularity of enamel cutting edges, (3) the asymmetry of the lingual and buccal prisms, and (4) the degree of cement deposition in reentrant angles. A catalogue of basic, reserve, and rare morphotypes has been created for Lemmus sibiricus and Myopus schisticolor. The approach developed here is recommended for further research into the spatial, temporal, and ontogenetic variation in Lemmini, based on their dental characters.
机译:本文在对现有文献和动物学资料进行分析的基础上,总结了最近旅鼠(Lemmini)及其最早的祖先的形态学牙齿模式的数据。统一了区分形态型的标准,并提出了四个评估指标:(1)牙合面的复杂性;(2)牙釉质切削刃的规则性;(3)舌和颊棱镜的不对称性;以及(4) )水泥在凹角内的沉积程度。已经为西伯利亚豆和日本血吸虫创建了基本,保留和稀有形态型的目录。建议根据此处的方法的牙齿特征,进一步研究Lemmini的空间,时间和个体发育变异。

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