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Updated: Jun 2, 2026

Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology
Published on: August 22, 2022
[The structure of morphological variability (with the masticatory surface morphotypes of the lower first molar in
Abstract:
An analysis of morphotypical variability of the lower first molar in twelve species of Microtus genus revealed similarity in patterns of variability, consisting in two-three homologous series of three morphotypes of one class of rugosity in each series. In the majority of species, morphotypes are located in a single plane. In some species, morphotypes of other class of rugosity form the homologous series of a second plane so that the structure of the variability takes on a three-dimensional form. The variability spectrum is limited by molars design; at the different trends in complication of a masticatory surface have taxonomic weight of subgenus or species rank. Thus, incompleteness of homologous series is caused by taxonomic specificity and is nonrandom in essence.
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