Мorphological integration of the cranium and axial skeleton in european newts
2019
Tip dokumenta:
Konferencijski prilog (Objavljena verzija)
,
© 2019 by the University of Milan, the University of Pavia, the Natural History Museum of Milan and the University of Milano-Bicocca
Metapodaci
Prikaz svih podataka o dokumentuApstrakt:
Using micro-CT scanning and 3D geometric morphometrics of newt craniums and axial skeletons (first
three vertebrae) we explored the pattern of morphological integration. We tested if i) directly connected serially
homologous structures are more integrated than separated ones and ii) morphological integration coincides with
regional differentiation. We applied a multilevel approach by analyzing patterns of integration at static and
evolutionary levels, i.e., within and between species respectively. At the static level we choose the genus Triturus
as a representative monophyletic group. We analysed between-individual variation in shape to detect functional
modules and within-individuals the asymmetric component of variation in shape to detect developmental modules.
At the evolutionary level, 17 species from five genera were analysed in phylogenetic context and taking effects of
allometry on modularity and integration into account. We found that allometry is an important integrating factor
in serially homologous structures. At the static level and after the correction for allometry, functional integration
between the cranium and first vertebrae was weak but statistically significant between all elements, and
developmental integration was significant between the cranium and the atlas and first and second trunk vertebrae.
At the evolutionary level, the cranium, atlas and trunk vertebrae separate as three different modules. Our results
suggest that, at the evolutionary level, morphological integration coincide with regional and functional
differentiation of the axial skeleton. This allows the relatively independent evolution of the cranial skeleton and
the vertebral column, separate of the significant functional and developmental integration at the static level.
Finansiranje / projekti:
- Diverzitet vodozemaca i gmizavaca Balkana: evolucioni aspekti i konzervacija (RS-MESTD-Basic Research (BR or ON)-173043)
U:
- XX European Congress of Herpetology. Program & Abstracts; 2019 Sep 2-6; Milan, Italy. Milan, Italy: University of Milan, the University of Pavia, the Natural History Museum of Milan and the University of Milano-Bicocca; 2019. p. 142.
Povezane informacije:
- Druga verzija
https://radar.ibiss.bg.ac.rs/handle/123456789/5528