Please use this identifier to cite or link to this item: https://biore.bio.bg.ac.rs/handle/123456789/3137
Title: The ontogenetic origins of skull shape disparity in the Triturus cristatus group
Authors: Cvijanović, Milena
Ivanović, Ana 
Kalezić, Miloš
Zelditch, Miriam
Issue Date: 14-Aug-2014
Project: Diversity of the amphibians and reptiles on the Balkan Peninsula: evolutionary and conservation aspects 
Journal: Evolution and Development
Abstract: 
Comparative studies of ontogenies of closely related species provide insights into the mechanisms responsible for morphological diversification. Using geometric morphometrics, we investigated the ontogenetic dynamics of postlarval skull shape and disparity in three closely related crested newt species. The skull shapes of juveniles just after metamorphosis (hereafter metamorphs) and adult individuals were sampled by landmark configurations that describe the shape of the dorsal and ventral side of the newt skull, and analyzed separately. The three species differ in skull size and shape in metamorphs and adults. The ontogenies of dorsal and ventral skull differ in the orientation but not lengths of the ontogenetic trajectories. The disparity of dorsal skull shape increases over ontogeny, but that of ventral skull shape does not. Thus, modifications of ontogenetic trajectories can, but need not, increase the disparity of shape. In species with biphasic life-cycles, when ontogenetic trajectories for one stage can be decoupled from those of another, increases and decreases in disparity are feasible, but our results show that they need not occur. © 2014 Wiley Periodicals, Inc.
URI: https://biore.bio.bg.ac.rs/handle/123456789/3137
ISSN: 1520-541X
DOI: 10.1111/ede.12093
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