English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Background  The rapid radiation of crested newts ( Triturus cristatus  superspecies) comprises four morphotypes: 1) the  T. karelinii  group, 2)  T. carnifex  -  T. macedonicus , 3)  T. cristatus  and 4)  T. dobrogicus . These vary in body build and the number of rib-bearing pre-sacral vertebrae (NRBV). The phylogenetic relationships of the morphotypes have not yet been settled, despite several previous attempts, employing a variety of molecular markers. We here resolve the crested newt phylogeny by using complete mitochondrial genome sequences.    Results  Bayesian inference based on the mitogenomic data yields a fully bifurcating, significantly supported tree, though Maximum Likelihood inference yields low support values. The internal branches connecting the morphotypes are short relative to the terminal branches. Seen from the root of  Triturus  (NRBV = 13), a basal dichotomy separates the  T. karelinii  group (NRBV = 13) from the remaining crested newts. The next split divides the latter assortment into  T. carnifex  -  T. macedonicus  (NRBV = 14) versus  T. cristatus  (NRBV = 15) and  T. dobrogicus  (NRBV = 16 or 17).    Conclusions  We argue that the Bayesian full mitochondrial DNA phylogeny is superior to previous attempts aiming to recover the crested newt species tree. Furthermore, our new phylogeny involves a maximally parsimonious interpretation of NRBV evolution. Calibrating the phylogeny allows us to evaluate potential drivers for crested newt cladogenesis. The split between the  T. karelinii  group and the three other morphotypes, at ca. 10.4 Ma, is associated with the separation of the Balkan and Anatolian landmasses (12-9 Ma). No currently known vicariant events can be ascribed to the other two splits, first at ca. 9.3 Ma, separating  T. carnifex  -  T. macedonicus , and second at ca. 8.8 Ma, splitting  T. cristatus  and  T. dobrogicus . The crested newt morphotypes differ in the duration of their annual aquatic period. We speculate on the role that this ecological differentiation could have played during speciation.

Unraveling the rapid radiation of crested newts (Triturus cristatus superspecies) using complete mitogenomic sequences