Please use this identifier to cite or link to this item: https://biore.bio.bg.ac.rs/handle/123456789/4823
Title: Variation in vertebrae shape across small‐bodied newts reveals functional and developmental constraints acting upon the trunk region
Authors: Scholtes, S. S.
Arntzen, J. W.
Ajduković, M.
Ivanović, A. 
Keywords: Lissotriton;Geometric morphometrics;High-dimensional clustering analysis;Micro computed tomography;Phenotypic trajectory analysis;Regionalization;Trunk vertebrae
Issue Date: 10-Nov-2021
Rank: M21
Publisher: Wiley
Journal: Journal of Anatomy
Abstract: 
The salamander vertebral column is largely undifferentiated with a series of more or less uniform rib-bearing presacral vertebrae traditionally designated as the trunk region. We explored regionalization of the salamander trunk in seven species and two subspecies of the salamander genus Lissotriton by the combination of microcomputed tomography scanning and geometric morphometrics. The detailed information on trunk vertebral shape was subjected to a multidimensional cluster analysis and a phenotypic trajectory analysis. With these complementary approaches, we observed a clear morphological regionalization. Clustering analysis showed that the anterior trunk vertebrae (T1 and T2) have distinct morphologies that are shared by all taxa, whereas the subsequent, more posterior vertebrae show significant disparity between species. The phenotypic trajectory analysis revealed that all taxa share a common pattern and amount of shape change along the trunk region. Altogether, our results support the hypothesis of a conserved anterior-posterior developmental patterning which can be associated with different functional demands, reflecting (sub)species' and, possibly, regional ecological divergences within species.
URI: https://biore.bio.bg.ac.rs/handle/123456789/4823
DOI: 10.1111/joa.13591
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