Please use this identifier to cite or link to this item: https://biore.bio.bg.ac.rs/handle/123456789/3136
Title: Facultative paedomorphosis and the pattern of intra- and interspecific variation in cranial skeleton: Lessons from European newts (Ichthyosaura alpestris and Lissotriton vulgaris)
Authors: Ivanović, Ana 
Cvijanović, Milena
Denoël, Mathieu
Slijepčević, Maja
Kalezić, Miloš
Keywords: Development;European newts;Heterochronic polymorphism;Skull morphology
Issue Date: 9-Oct-2013
Project: Diversity of the amphibians and reptiles on the Balkan Peninsula: evolutionary and conservation aspects 
NL-TAF 3082
Naturalis Temminck fellowship
J.0008.13
C-13/03
Journal: Zoomorphology
Abstract: 
Paedomorphosis, the presence of ancestral larval and juvenile traits that occur at the descendent adult stage, is an evolutionary phenomenon that shaped morphological evolution in many vertebrate lineages, including tailed amphibians. Among salamandrid species, paedomorphic and metamorphic phenotypes can be observed within single populations (facultative paedomorphosis). Despite wide interest in facultative paedomorphosis and polymorphism produced by heterochronic changes (heterochronic polymorphism), the studies that investigate intraspecific morphological variation in facultative paedomorphic species are largely missing. By quantifying the cranium size and development (bone development and remodeling), we investigated the variation at multiple levels (i.e., between sexes, populations and species) of two facultatively paedomorphic European newt species: the alpine and the smooth newt. The pattern of variation between paedomorphs (individuals keeping larval traits at the adult stage) and metamorphs (metamorphosed adult individuals) varied between species and among populations within a single species. The patterns of variation in size and skull formation appear to be more uniform in the alpine than in the smooth newt, indicating that developmental constraints differed between species (more pronounced in alpine than in smooth newt). Our study shows that the cranial skeleton provides detailed insight in the pattern of variation and divergence in heterochronic polymorphism within and between species and open new questions related to heterochronic polymorphism and evolution of cranial skeleton. © 2013 Springer-Verlag Berlin Heidelberg.
URI: https://biore.bio.bg.ac.rs/handle/123456789/3136
ISSN: 0720-213X
DOI: 10.1007/s00435-013-0202-7
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