conchological features; geometric morphometry;
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The aquatic gastropod Lymnaea stagnalis exhibits a high variability of conchological features. To assess the degree of variation in the size and shape of the shell in the populations of this species inhabiting the Central Russian Upland, a comparative analysis was carried out using the methods of classical and geometric morphometry. A pairwise comparison of populations using the Post-hoc test for perMANOVA has shown that when using geometric morphometry, there were more statistically significant differences between the groups of snails compared than when using classical conchiometric analysis. In addition, the pattern of distribution of populations by groups during clusterization differed significantly when using different morphometric methods. We believe that the methods of geometric morphometry, which make it possible to give an integral characteristic of the shell, are better suited for understanding the patterns of microevolutionary processes in populations of gastropods, as well as studying the ecological characteristics of species. Nevertheless, in order to prevent the loss of important conchiometric data that can be used for species identification and assessment of intra- and inter-population variability, when using geometric morphometry, it is also important to take into account the absolute dimensional characteristics of the object of study.

Оценка изменчивости конхиологических признаков Lymnaea stagnalis с использованием методов классической и геометрической морфометрии
Снегин Э.А.; Юсупов С.Р.; Юсупова А.Ю.;