Regionalization and morphological integration in the vertebral column of Eurasian small‐bodied newts (Salamandridae: Lissotriton)
2023
Аутори:
Urošević, AleksandarAjduković, Maja
Vučić, Tijana
Scholtes, Stefan
Arntzen, Jan, W
Ivanović, Ana
Тип документа:
Чланак у часопису (Рецензирана верзија)
,
© 2023 Wiley Periodicals LLC.
Метаподаци
Приказ свих података о документуАпстракт:
Serially homologous structures may have complex patterns of regionalization and
morphological integration, influenced by developmental Hox gene expression and
functional constraints. The vertebral column, consisting of a number of repeated,
developmentally constrained, and highly integrated units—vertebrae—is such a
complex serially homologous structure. Functional diversification increases regionalization
and modularity of the vertebral column, particularly in mammals. For
salamanders, three concepts of regionalization of the vertebral column have been
proposed, recognizing one, two, or three presacral regions. Using three‐dimensional
geometric morphometrics on vertebra models acquired with microcomputerized
tomography scanning, we explored the covariation of vertebrae in four closely
related taxa of small‐bodied newts in the genus Lissotriton. The data were analyzed
by segmented linear regression to explore patterns of vertebral regionalization and
by a two‐block partial least squares method to test for morphological integration. All
taxa show a morphological shift posterior to the fifth trunk vertebra, which
corresponds to the two‐region concept. However, morphological integration is
found to be strongest in the mid‐trunk. Taken jointly, these results indicate a highly
integrated presacral vertebral column with a subtle two‐region differentiation. The
results are discussed in relation to specific functional requirements, developmental
and phylogenetic constraints, and specific requirements posed by a biphasic life
cycle and different locomotor modes (swimming vs. walking). Further research
should be conducted on different ontogenetic stages and closely related but
ecologically differentiated species.
Напомена:
This is the peer reviewed version of the following article: Urošević, A., Ajduković, M., Vučić, T., Scholtes, S.J., Arntzen J.W., Ivanović, A. (2023). Regionalization and morphological integration in the vertebral column of Eurasian small‐bodied newts (Salamandridae: Lissotriton). Journal of Experimental Zoology Part B – Molecular and Developmental Evolution, which has been published in final form at http://doi.org/10.1002/jez.b.23205
Кључне речи:
axial skeleton; geometric morphometrics; micro‐CT scanning; modularity; regional differentiation; serial homology; tailed amphibiansИзвор:
Journal of Experimental Zoology Part B - Molecular and Developmental Evolution, 2023, 2023Финансирање / пројекти:
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200007 (Универзитет у Београду, Институт за биолошка истраживања 'Синиша Станковић') (RS-MESTD-inst-2020-200007)
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200178 (Универзитет у Београду, Биолошки факултет) (RS-MESTD-inst-2020-200178)