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| Urošević, A.; Ljubisavljević, K.; Ivanović, A.. |
| We analysed patterns of skull size and shape variation among populations of the Common wall lizard (Podarcis muralis) in the Central Balkans, particularly the effecs of insularity and the presence of the ecologically similar lacertid lizard species P. melisellensis. Two components of shape variation were analysed – size dependent (allometric) and size independent shape changes. The observed shape differentiation relating to insularity was greatly size-dependent and concordant to allometric shape changes which explained over 20% of variation in the skull shape in the analysed sample. The explorative analysis of size-independent shape changes revealed that populations of P. muralis which share habitat with P. melisellensis diverge from populations which do... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Cranial skeleton; Insularity; Lacertid lizards; Syntopy; 42.82. |
| Ano: 2014 |
URL: http://www.repository.naturalis.nl/record/474211 |
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| Cvijanović, M.; Ivanović, A.; Kolarov, N.T.; Džukić, G.; Kalezić, M.L.. |
| When the phenotypic divergence within a monophyletic group is characterised by parallel variation of different phenotypic traits, it is very likely that the environment through constraints and/or selection has affected the developmental pathways simultaneously. Such patterns of phenotypic divergence characterise the phenotypic evolution of the crested newts (Triturus cristatus superspecies). In this study, we have examined interspecific variations in the embryonic development of four crested newt species. The species are similar with respect to some basic developmental traits, some morphologically defined developmental stages and the survival rate during early embryogenesis. However, there is significant variation in the developmental rate, as well as... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Developmental correlations; Developmental sequences; Life-history; Ontogenetic trajectories; 42.82. |
| Ano: 2009 |
URL: http://www.repository.naturalis.nl/record/311149 |
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| Ivanović, A.; Aljančič, G.; Artzen, J.W.. |
| We performed an exploratory analysis of the morphology of the cranium in the white olm (Proteus anguinus anguinus) and the black olm (P. a. parkelj) with micro-CT scanning and geometric morphometrics. The mudpuppy (Necturus maculosus) was used as an outgroup. The black olm falls outside the white olm morphospace by a markedly wider skull, shorter vomers which are positioned further apart and by laterally positioned squamosals and quadrates relative to the palate (the shape of the buccal cavity). On account of its robust skull with more developed premaxillae a shorter otico-occipital region, the black olm is positioned closer to Necturus than are the studied specimens of the white olm. The elongated skull of the white olm, with an anteriorly positioned jaw... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Cranial skeleton; Geometric morphometrics; Proteidae; Troglomorphism; 42.82. |
| Ano: 2013 |
URL: http://www.repository.naturalis.nl/record/475330 |
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