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5 results for “Ommatotriton”
Figure 2 in Body size and age in three populations of the northern banded newt Ommatotriton ophryticus (Berthold, 1846) from Turkey
Figure 2. Cross-sections through phalanges of O. ophryticus. A) An 8-year-old female from Bahçesultan. Each LAG corresponds to a year. B) An 8-year-old female from Tosya. The first LAG was destroyed by endosteal resorption. Periphery was not regarded as a LAG. Arrowheads show the LAGs and red arrow shows the false LAG (e.b. = endosteal bone, e.r. = endosteal resorption, k.l. = Kastschenko line, m.c. = marrow cavity, p. = periphery).
Next-generation phylogeography of the banded newts (Ommatotriton): A phylogenetic hypothesis for three ancient species with geographically restricted interspecific gene flow and deep intraspecific genetic structure
<p class="MsoNoSpacing">Technological developments now make it possible to employ many markers for many individuals in a phylogeographic setting, even for taxa with large and complex genomes such as salamanders. The banded newt (genus <i>Ommatotriton</i>) from the Near East has been proposed to contain three species (<i>O. nesterovi</i>, <i>O. ophryticus </i>and <i>O. vittatus</i>) with unclear phylogenetic relationships, apparently limited interspecific gene flow and deep intraspecific geographic mtDNA structure. We use parallel tagged amplicon sequencing to obtain 177 nuclear DNA markers for 35 banded newts sampled throughout the range. We determine population structure (with Bayesian clustering and principal component analysis), interspecific gene flow (by determining the distribution of species-diagnostic alleles) and phylogenetic relationships (by maximum likelihood inference of concatenated sequence data and based on a summary-coalescent approach). We confirm that the three proposed species are genetically distinct. A sister relationship between <i>O. nesterovi</i> and <i>O. ophryticus</i> is suggested. We find evidence for introgression between <i>O. nesterovi</i> and <i>O. ophryticus</i>, but this is geographically limited. Intraspecific structuring is extensive, with the only recognized banded newt subspecies, <i>O. vittatus cilicensis</i>, representing the most distinct lineage below the species level. While mtDNA mostly mirrors the pattern observed in nuclear DNA, all banded newt species show mito-nuclear discordance as well.</p>
Next-generation phylogeography of the banded newts (Ommatotriton): A phylogenetic hypothesis for three ancient species with geographically restricted interspecific gene flow and deep intraspecific genetic structure
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Data from: The Near East as a cradle of biodiversity: a phylogeography of banded newts (genus Ommatotriton) reveals extensive inter- and intraspecific genetic differentiation
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Figure 1 in Body size and age in three populations of the northern banded newt Ommatotriton ophryticus (Berthold, 1846) from Turkey
Figure 1. Map showing the localities of studied samples of O. ophryticus (1. Bahçesultan village/Bilecik; 2. Tosya/Kastamonu; 3. Erbaa/Tokat).
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