TY  - JOUR
AU  - Urošević, Aleksandar
AU  - Ajduković, Maja
AU  - Vučić, Tijana
AU  - Scholtes, Stefan
AU  - Arntzen, Jan, W
AU  - Ivanović, Ana
PY  - 2023
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/5817
AB  - 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.
PB  - John Wiley and Sons Inc
T2  - Journal of Experimental Zoology Part B - Molecular and Developmental Evolution
T1  - Regionalization and morphological integration in the vertebral column of Eurasian small‐bodied newts (Salamandridae: Lissotriton)
VL  - 2023
DO  - 10.1002/jez.b.23205
ER  - 

@article{
author = "Urošević, Aleksandar and Ajduković, Maja and Vučić, Tijana and Scholtes, Stefan and Arntzen, Jan, W and Ivanović, Ana",
year = "2023",
abstract = "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.",
publisher = "John Wiley and Sons Inc",
journal = "Journal of Experimental Zoology Part B - Molecular and Developmental Evolution",
title = "Regionalization and morphological integration in the vertebral column of Eurasian small‐bodied newts (Salamandridae: Lissotriton)",
volume = "2023",
doi = "10.1002/jez.b.23205"
}

Urošević, A., Ajduković, M., Vučić, T., Scholtes, S., Arntzen, J. W.,& Ivanović, A.. (2023). Regionalization and morphological integration in the vertebral column of Eurasian small‐bodied newts (Salamandridae: Lissotriton). in Journal of Experimental Zoology Part B - Molecular and Developmental Evolution
John Wiley and Sons Inc., 2023.
https://doi.org/10.1002/jez.b.23205

Urošević A, Ajduković M, Vučić T, Scholtes S, Arntzen JW, Ivanović A. Regionalization and morphological integration in the vertebral column of Eurasian small‐bodied newts (Salamandridae: Lissotriton). in Journal of Experimental Zoology Part B - Molecular and Developmental Evolution. 2023;2023.
doi:10.1002/jez.b.23205 .

Urošević, Aleksandar, Ajduković, Maja, Vučić, Tijana, Scholtes, Stefan, Arntzen, Jan, W, Ivanović, Ana, "Regionalization and morphological integration in the vertebral column of Eurasian small‐bodied newts (Salamandridae: Lissotriton)" in Journal of Experimental Zoology Part B - Molecular and Developmental Evolution, 2023 (2023),
https://doi.org/10.1002/jez.b.23205 . .

TY  - JOUR
AU  - Ivanović, Ana
AU  - Cvijanović, Milena
AU  - Vučić, Tijana
AU  - Arntzen, Jan W.
PY  - 2023
UR  - https://link.springer.com/10.1007/s13127-022-00585-5
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/5167
AB  - We examined the cranial morphology and cranial kinesis of the common toads Bufo bufo and B. spinosus with micro-computed tomography and geometric morphometrics and compared the results with published data for related species in a phylogenetic context. The species significantly diverge in skull shape. The skull of B. spinosus is shorter and higher, with a ventral arm of the squamosal bone and the jaw articulation point positioned perpendicular to the braincase, in comparison with a more lateral position in B. bufo . In either species, females have a shorter snout and a higher and wider skull at the jaw articulation point that is positioned more posteriorly, in comparison with conspecific males. High variation in the amount of bone ossification was recorded in both species, ranging from scarcely ossified and loosely connected bones to highly ossified and firmly connected bones. We also found that skull shape and inferred kinetic properties of the skull are highly variable across the Bufonini tribe. However, sample sizes are mostly small and intraspecific variation is high, which might compromise the analyses. Overall, the results suggest that developmental plasticity produces high variation in ossification and cranial kinesis, affecting individuals’ feeding performances. At the population level, this variation supports an efficient exploitation of the habitat and may promote morphological adaptation in a changing environment.
PB  - Heidelberg: Springer Heidelberg
T2  - Organisms Diversity & Evolution
T1  - Differentiation of skull morphology and cranial kinesis in common toads
VL  - 23
DO  - 10.1007/s13127-022-00585-5
SP  - 209
EP  - 219
ER  - 

@article{
author = "Ivanović, Ana and Cvijanović, Milena and Vučić, Tijana and Arntzen, Jan W.",
year = "2023",
abstract = "We examined the cranial morphology and cranial kinesis of the common toads Bufo bufo and B. spinosus with micro-computed tomography and geometric morphometrics and compared the results with published data for related species in a phylogenetic context. The species significantly diverge in skull shape. The skull of B. spinosus is shorter and higher, with a ventral arm of the squamosal bone and the jaw articulation point positioned perpendicular to the braincase, in comparison with a more lateral position in B. bufo . In either species, females have a shorter snout and a higher and wider skull at the jaw articulation point that is positioned more posteriorly, in comparison with conspecific males. High variation in the amount of bone ossification was recorded in both species, ranging from scarcely ossified and loosely connected bones to highly ossified and firmly connected bones. We also found that skull shape and inferred kinetic properties of the skull are highly variable across the Bufonini tribe. However, sample sizes are mostly small and intraspecific variation is high, which might compromise the analyses. Overall, the results suggest that developmental plasticity produces high variation in ossification and cranial kinesis, affecting individuals’ feeding performances. At the population level, this variation supports an efficient exploitation of the habitat and may promote morphological adaptation in a changing environment.",
publisher = "Heidelberg: Springer Heidelberg",
journal = "Organisms Diversity & Evolution",
title = "Differentiation of skull morphology and cranial kinesis in common toads",
volume = "23",
doi = "10.1007/s13127-022-00585-5",
pages = "209-219"
}

Ivanović, A., Cvijanović, M., Vučić, T.,& Arntzen, J. W.. (2023). Differentiation of skull morphology and cranial kinesis in common toads. in Organisms Diversity & Evolution
Heidelberg: Springer Heidelberg., 23, 209-219.
https://doi.org/10.1007/s13127-022-00585-5

Ivanović A, Cvijanović M, Vučić T, Arntzen JW. Differentiation of skull morphology and cranial kinesis in common toads. in Organisms Diversity & Evolution. 2023;23:209-219.
doi:10.1007/s13127-022-00585-5 .

Ivanović, Ana, Cvijanović, Milena, Vučić, Tijana, Arntzen, Jan W., "Differentiation of skull morphology and cranial kinesis in common toads" in Organisms Diversity & Evolution, 23 (2023):209-219,
https://doi.org/10.1007/s13127-022-00585-5 . .

TY  - CONF
AU  - Urošević, Aleksandar
AU  - Ajduković, Maja
AU  - Arntzen, Jan W
AU  - Ivanović, Ana
PY  - 2019
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/5528
AB  - Using micro-CT scanning and 3D geometric morphometrics of newt craniums and axial skeletons (firstthree vertebrae) we explored the pattern of morphological integration. We tested if i) directly connected seriallyhomologous structures are more integrated than separated ones and ii) morphological integration coincides withregional differentiation. We applied a multilevel approach by analyzing patterns of integration at static andevolutionary levels, i.e., within and between species respectively. At the static level we choose the genus Triturusas a representative monophyletic group. We analysed between-individual variation in shape to detect functionalmodules 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 ofallometry on modularity and integration into account. We found that allometry is an important integrating factorin serially homologous structures. At the static level and after the correction for allometry, functional integrationbetween the cranium and first vertebrae was weak but statistically significant between all elements, anddevelopmental 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 resultssuggest that, at the evolutionary level, morphological integration coincide with regional and functionaldifferentiation of the axial skeleton. This allows the relatively independent evolution of the cranial skeleton andthe vertebral column, separate of the significant functional and developmental integration at the static level.
PB  - Belgrade: Institute for Biological Research "Siniša Stanković" - National Institute of the Republic of Serbia, University of Belgrade
C3  - XX European Congress of Herpetology. Program & Abstracts; 2019 Sep 2-6; Milan, Italy
T1  - Мorphological integration of the cranium and axial skeleton in european newts
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_5528
ER  - 

@conference{
author = "Urošević, Aleksandar and Ajduković, Maja and Arntzen, Jan W and Ivanović, Ana",
year = "2019",
abstract = "Using micro-CT scanning and 3D geometric morphometrics of newt craniums and axial skeletons (firstthree vertebrae) we explored the pattern of morphological integration. We tested if i) directly connected seriallyhomologous structures are more integrated than separated ones and ii) morphological integration coincides withregional differentiation. We applied a multilevel approach by analyzing patterns of integration at static andevolutionary levels, i.e., within and between species respectively. At the static level we choose the genus Triturusas a representative monophyletic group. We analysed between-individual variation in shape to detect functionalmodules 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 ofallometry on modularity and integration into account. We found that allometry is an important integrating factorin serially homologous structures. At the static level and after the correction for allometry, functional integrationbetween the cranium and first vertebrae was weak but statistically significant between all elements, anddevelopmental 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 resultssuggest that, at the evolutionary level, morphological integration coincide with regional and functionaldifferentiation of the axial skeleton. This allows the relatively independent evolution of the cranial skeleton andthe vertebral column, separate of the significant functional and developmental integration at the static level.",
publisher = "Belgrade: Institute for Biological Research "Siniša Stanković" - National Institute of the Republic of Serbia, University of Belgrade",
journal = "XX European Congress of Herpetology. Program & Abstracts; 2019 Sep 2-6; Milan, Italy",
title = "Мorphological integration of the cranium and axial skeleton in european newts",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_5528"
}

Urošević, A., Ajduković, M., Arntzen, J. W.,& Ivanović, A.. (2019). Мorphological integration of the cranium and axial skeleton in european newts. in XX European Congress of Herpetology. Program & Abstracts; 2019 Sep 2-6; Milan, Italy
Belgrade: Institute for Biological Research "Siniša Stanković" - National Institute of the Republic of Serbia, University of Belgrade..
https://hdl.handle.net/21.15107/rcub_ibiss_5528

Urošević A, Ajduković M, Arntzen JW, Ivanović A. Мorphological integration of the cranium and axial skeleton in european newts. in XX European Congress of Herpetology. Program & Abstracts; 2019 Sep 2-6; Milan, Italy. 2019;.
https://hdl.handle.net/21.15107/rcub_ibiss_5528 .

Urošević, Aleksandar, Ajduković, Maja, Arntzen, Jan W, Ivanović, Ana, "Мorphological integration of the cranium and axial skeleton in european newts" in XX European Congress of Herpetology. Program & Abstracts; 2019 Sep 2-6; Milan, Italy (2019),
https://hdl.handle.net/21.15107/rcub_ibiss_5528 .

TY  - CONF
AU  - Urošević, Aleksandar
AU  - Ajduković, Maja
AU  - Arntzen, Jan W
AU  - Ivanović, Ana
PY  - 2019
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/5527
AB  - 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.
PB  - Milan, Italy: University of Milan, the University of Pavia, the Natural History Museum of Milan and the University of Milano-Bicocca
C3  - XX European Congress of Herpetology. Program & Abstracts; 2019 Sep 2-6; Milan, Italy
T1  - Мorphological integration of the cranium and axial skeleton in european newts
SP  - 142
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_5527
ER  - 

@conference{
author = "Urošević, Aleksandar and Ajduković, Maja and Arntzen, Jan W and Ivanović, Ana",
year = "2019",
abstract = "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.",
publisher = "Milan, Italy: University of Milan, the University of Pavia, the Natural History Museum of Milan and the University of Milano-Bicocca",
journal = "XX European Congress of Herpetology. Program & Abstracts; 2019 Sep 2-6; Milan, Italy",
title = "Мorphological integration of the cranium and axial skeleton in european newts",
pages = "142",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_5527"
}

Urošević, A., Ajduković, M., Arntzen, J. W.,& Ivanović, A.. (2019). Мorphological integration of the cranium and axial skeleton in european newts. in 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., 142.
https://hdl.handle.net/21.15107/rcub_ibiss_5527

Urošević A, Ajduković M, Arntzen JW, Ivanović A. Мorphological integration of the cranium and axial skeleton in european newts. in XX European Congress of Herpetology. Program & Abstracts; 2019 Sep 2-6; Milan, Italy. 2019;:142.
https://hdl.handle.net/21.15107/rcub_ibiss_5527 .

Urošević, Aleksandar, Ajduković, Maja, Arntzen, Jan W, Ivanović, Ana, "Мorphological integration of the cranium and axial skeleton in european newts" in XX European Congress of Herpetology. Program & Abstracts; 2019 Sep 2-6; Milan, Italy (2019):142,
https://hdl.handle.net/21.15107/rcub_ibiss_5527 .

TY  - JOUR
AU  - Arntzen, Jan W.
AU  - Üzüm, Nazan
AU  - Ajduković, Maja
AU  - Ivanović, Ana
AU  - Wielstra, Ben
PY  - 2018
UR  - https://peerj.com/articles/5317
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/3120
AB  - Relationships between phylogenetic relatedness, hybrid zone spatial structure, the amount of interspecific gene flow and population demography were investigated, with the newt genus Triturus as a model system. In earlier work, a bimodal hybrid zone of two distantly related species combined low interspecific gene flow with hybrid sterility and heterosis was documented. Apart from that, a suite of unimodal hybrid zones in closely related Triturus showed more or less extensive introgressive hybridization with no evidence for heterosis. We here report on population demography and interspecific gene flow in two Triturus species ( T. macedonicus and T. ivanbureschi in Serbia). These are two that are moderately related, engage in a heterogeneous uni-/bimodal hybrid zone and hence represent an intermediate situation. This study used 13 diagnostic nuclear genetic markers in a population at the species contact zone. This showed that all individuals were hybrids, with no parentals detected. Age, size and longevity and the estimated growth curves are not exceeding that of the parental species, so that we conclude the absence of heterosis in T. macedonicus – T. ivanbureschi . Observations across the genus support the hypothesis that fertile hybrids allocate resources to reproduction and infertile hybrids allocate resources to growth. Several Triturus species hybrid zones not yet studied allow the testing of this hypothesis.
T2  - PeerJ
T1  - Absence of heterosis in hybrid crested newts
VL  - 6
DO  - 10.7717/peerj.5317
SP  - e5317
ER  - 

@article{
author = "Arntzen, Jan W. and Üzüm, Nazan and Ajduković, Maja and Ivanović, Ana and Wielstra, Ben",
year = "2018",
abstract = "Relationships between phylogenetic relatedness, hybrid zone spatial structure, the amount of interspecific gene flow and population demography were investigated, with the newt genus Triturus as a model system. In earlier work, a bimodal hybrid zone of two distantly related species combined low interspecific gene flow with hybrid sterility and heterosis was documented. Apart from that, a suite of unimodal hybrid zones in closely related Triturus showed more or less extensive introgressive hybridization with no evidence for heterosis. We here report on population demography and interspecific gene flow in two Triturus species ( T. macedonicus and T. ivanbureschi in Serbia). These are two that are moderately related, engage in a heterogeneous uni-/bimodal hybrid zone and hence represent an intermediate situation. This study used 13 diagnostic nuclear genetic markers in a population at the species contact zone. This showed that all individuals were hybrids, with no parentals detected. Age, size and longevity and the estimated growth curves are not exceeding that of the parental species, so that we conclude the absence of heterosis in T. macedonicus – T. ivanbureschi . Observations across the genus support the hypothesis that fertile hybrids allocate resources to reproduction and infertile hybrids allocate resources to growth. Several Triturus species hybrid zones not yet studied allow the testing of this hypothesis.",
journal = "PeerJ",
title = "Absence of heterosis in hybrid crested newts",
volume = "6",
doi = "10.7717/peerj.5317",
pages = "e5317"
}

Arntzen, J. W., Üzüm, N., Ajduković, M., Ivanović, A.,& Wielstra, B.. (2018). Absence of heterosis in hybrid crested newts. in PeerJ, 6, e5317.
https://doi.org/10.7717/peerj.5317

Arntzen JW, Üzüm N, Ajduković M, Ivanović A, Wielstra B. Absence of heterosis in hybrid crested newts. in PeerJ. 2018;6:e5317.
doi:10.7717/peerj.5317 .

Arntzen, Jan W., Üzüm, Nazan, Ajduković, Maja, Ivanović, Ana, Wielstra, Ben, "Absence of heterosis in hybrid crested newts" in PeerJ, 6 (2018):e5317,
https://doi.org/10.7717/peerj.5317 . .

TY  - JOUR
AU  - Urošević, Aleksandar
AU  - Ajduković, Maja
AU  - Arntzen, Jan W.
AU  - Ivanović, Ana
PY  - 2016
UR  - http://linkinghub.elsevier.com/retrieve/pii/S0944200616300289
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/2993
AB  - Body elongation in vertebrates is often related to a lengthening of the vertebrae and an increase in their number. Changes in the number and shape of vertebrae are not necessarily linked. In tailed amphibians, a change in body shape is mostly associated with an increase in the number of trunk and tail vertebrae. Body elongation without a numerical change of vertebrae is rare. In Triturus aquatic salamanders body elongation is achieved by trunk elongation through an increase in the number of trunk vertebrae. We used computed microtomography and three-dimensional geometric morphometrics to document the size, shape and number of trunk vertebrae in seven Triturus species. The data suggest that body elongation has occurred more frequently than body shortening, possibly related to a more aquatic versus a more terrestrial locomotor style. Our results show that body elongation is achieved through an increase in the number of trunk vertebrae, and that interspecific differences in vertebral shape are correlated with this pattern of elongation. More gracile trunk vertebrae were found in the more elongated species. The shape differences are such that single trunk vertebrae can be used for the identification of species with a possible application in the identification of subfossil and fossil material.
PB  - Elsevier GmbH
T2  - Zoology
T1  - Vertebral shape and body elongation in Triturus newts
IS  - 5
VL  - 119
DO  - 10.1016/j.zool.2016.05.003
SP  - 439
EP  - 446
ER  - 

@article{
author = "Urošević, Aleksandar and Ajduković, Maja and Arntzen, Jan W. and Ivanović, Ana",
year = "2016",
abstract = "Body elongation in vertebrates is often related to a lengthening of the vertebrae and an increase in their number. Changes in the number and shape of vertebrae are not necessarily linked. In tailed amphibians, a change in body shape is mostly associated with an increase in the number of trunk and tail vertebrae. Body elongation without a numerical change of vertebrae is rare. In Triturus aquatic salamanders body elongation is achieved by trunk elongation through an increase in the number of trunk vertebrae. We used computed microtomography and three-dimensional geometric morphometrics to document the size, shape and number of trunk vertebrae in seven Triturus species. The data suggest that body elongation has occurred more frequently than body shortening, possibly related to a more aquatic versus a more terrestrial locomotor style. Our results show that body elongation is achieved through an increase in the number of trunk vertebrae, and that interspecific differences in vertebral shape are correlated with this pattern of elongation. More gracile trunk vertebrae were found in the more elongated species. The shape differences are such that single trunk vertebrae can be used for the identification of species with a possible application in the identification of subfossil and fossil material.",
publisher = "Elsevier GmbH",
journal = "Zoology",
title = "Vertebral shape and body elongation in Triturus newts",
number = "5",
volume = "119",
doi = "10.1016/j.zool.2016.05.003",
pages = "439-446"
}

Urošević, A., Ajduković, M., Arntzen, J. W.,& Ivanović, A.. (2016). Vertebral shape and body elongation in Triturus newts. in Zoology
Elsevier GmbH., 119(5), 439-446.
https://doi.org/10.1016/j.zool.2016.05.003

Urošević A, Ajduković M, Arntzen JW, Ivanović A. Vertebral shape and body elongation in Triturus newts. in Zoology. 2016;119(5):439-446.
doi:10.1016/j.zool.2016.05.003 .

Urošević, Aleksandar, Ajduković, Maja, Arntzen, Jan W., Ivanović, Ana, "Vertebral shape and body elongation in Triturus newts" in Zoology, 119, no. 5 (2016):439-446,
https://doi.org/10.1016/j.zool.2016.05.003 . .

TY  - JOUR
AU  - Recuero, E
AU  - Canestrelli, D
AU  - Voeroes, J
AU  - Szabo, K
AU  - Poyarkov, NA
AU  - Arntzen, Jan W
AU  - Crnobrnja-Isailović, Jelka M.
AU  - Kidov, AA
AU  - Cogalniceanu, Dan
AU  - Caputo, FP
AU  - Nascetti, G
AU  - Martinez-Solano, I
PY  - 2012
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/1234
AB  - New analytical methods are improving our ability to reconstruct robust species trees from multilocus datasets, despite difficulties in phylogenetic reconstruction associated with recent, rapid divergence, incomplete lineage sorting and/or introgression. In this study, we applied these methods to resolve the radiation of toads in the Bufo bufo (Anura, Bufonidae) species group, ranging from the Iberian Peninsula and North Africa to Siberia, based on sequences from two mitochondria] and four nuclear DNA regions (3490 base pairs). We obtained a fully-resolved topology, with the recently described Bufo eichwaldi from the Talysh Mountains in south Azerbaijan and Iran as the sister taxon to a clade including: (1) north African, Iberian, and most French populations, referred herein to Bufo spinosus based on the implied inclusion of populations from its type locality and (2) a second clade, sister to B. spinosus, including two sister subclades: one with all samples of Bufo verrucosissimus from the Caucasus and another one with samples of B. bufo from northern France to Russia, including the Apennine and Balkan peninsulas and most of Anatolia. Coalescent-based estimations of time to most recent common ancestors for each species and selected subclades allowed historical reconstruction of the diversification of the species group in the context of Mediterranean paleogeography and indicated a long evolutionary history in this region. Finally, we used our data to delimit the ranges of the four species, particularly the more widespread and historically confused B. spinosus and B. bufo, and identify potential contact zones, some of which show striking parallels with other co-distributed species. (C) 2011 Elsevier Inc. All rights reserved.
T2  - Molecular Phylogenetics and Evolution
T1  - Multilocus species tree analyses resolve the radiation of the widespread Bufo bufo species group (Anura, Bufonidae)
IS  - 1
VL  - 62
EP  - 86
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_1234
ER  - 

@article{
author = "Recuero, E and Canestrelli, D and Voeroes, J and Szabo, K and Poyarkov, NA and Arntzen, Jan W and Crnobrnja-Isailović, Jelka M. and Kidov, AA and Cogalniceanu, Dan and Caputo, FP and Nascetti, G and Martinez-Solano, I",
year = "2012",
abstract = "New analytical methods are improving our ability to reconstruct robust species trees from multilocus datasets, despite difficulties in phylogenetic reconstruction associated with recent, rapid divergence, incomplete lineage sorting and/or introgression. In this study, we applied these methods to resolve the radiation of toads in the Bufo bufo (Anura, Bufonidae) species group, ranging from the Iberian Peninsula and North Africa to Siberia, based on sequences from two mitochondria] and four nuclear DNA regions (3490 base pairs). We obtained a fully-resolved topology, with the recently described Bufo eichwaldi from the Talysh Mountains in south Azerbaijan and Iran as the sister taxon to a clade including: (1) north African, Iberian, and most French populations, referred herein to Bufo spinosus based on the implied inclusion of populations from its type locality and (2) a second clade, sister to B. spinosus, including two sister subclades: one with all samples of Bufo verrucosissimus from the Caucasus and another one with samples of B. bufo from northern France to Russia, including the Apennine and Balkan peninsulas and most of Anatolia. Coalescent-based estimations of time to most recent common ancestors for each species and selected subclades allowed historical reconstruction of the diversification of the species group in the context of Mediterranean paleogeography and indicated a long evolutionary history in this region. Finally, we used our data to delimit the ranges of the four species, particularly the more widespread and historically confused B. spinosus and B. bufo, and identify potential contact zones, some of which show striking parallels with other co-distributed species. (C) 2011 Elsevier Inc. All rights reserved.",
journal = "Molecular Phylogenetics and Evolution",
title = "Multilocus species tree analyses resolve the radiation of the widespread Bufo bufo species group (Anura, Bufonidae)",
number = "1",
volume = "62",
pages = "86",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_1234"
}

Recuero, E., Canestrelli, D., Voeroes, J., Szabo, K., Poyarkov, N., Arntzen, J. W., Crnobrnja-Isailović, J. M., Kidov, A., Cogalniceanu, D., Caputo, F., Nascetti, G.,& Martinez-Solano, I.. (2012). Multilocus species tree analyses resolve the radiation of the widespread Bufo bufo species group (Anura, Bufonidae). in Molecular Phylogenetics and Evolution, 62(1).
https://hdl.handle.net/21.15107/rcub_ibiss_1234

Recuero E, Canestrelli D, Voeroes J, Szabo K, Poyarkov N, Arntzen JW, Crnobrnja-Isailović JM, Kidov A, Cogalniceanu D, Caputo F, Nascetti G, Martinez-Solano I. Multilocus species tree analyses resolve the radiation of the widespread Bufo bufo species group (Anura, Bufonidae). in Molecular Phylogenetics and Evolution. 2012;62(1):null-86.
https://hdl.handle.net/21.15107/rcub_ibiss_1234 .

Recuero, E, Canestrelli, D, Voeroes, J, Szabo, K, Poyarkov, NA, Arntzen, Jan W, Crnobrnja-Isailović, Jelka M., Kidov, AA, Cogalniceanu, Dan, Caputo, FP, Nascetti, G, Martinez-Solano, I, "Multilocus species tree analyses resolve the radiation of the widespread Bufo bufo species group (Anura, Bufonidae)" in Molecular Phylogenetics and Evolution, 62, no. 1 (2012),
https://hdl.handle.net/21.15107/rcub_ibiss_1234 .