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Université de Fribourg

3D morphology of pharyngeal dentition of the genus Capoeta (Cyprinidae): Implications for taxonomy and phylogeny

Ayvazyan, Anna ; Vasilyan, Davit ; Böhme, Madelaine

In: Journal of Zoological Systematics and Evolutionary Research, 2019, vol. 57, no. 1, p. 179–190

Capoeta is a herbivorous cyprinid fish genus, widely distributed in water bodies of Western Asia. Recent species show a distinct biogeographic pattern with endemic distribution in large fluvial drainage basins. As other cyprinids, the species of this genus are characterized by the presence of the pharyngeal bone with pharyngeal teeth. Despite this, the detailed morphology of the pharyngeal...

Université de Fribourg

Global glacier volume projections under high-end climate change scenarios

Shannon, Sarah ; Smith, Robin ; Wiltshire, Andy ; Payne, Tony ; Huss, Matthias ; Betts, Richard ; Caesar, John ; Koutroulis, Aris ; Jones, Darren ; Harrison, Stephan

In: The Cryosphere, 2019, vol. 13, no. 1, p. 325–350

The Paris agreement aims to hold global warming to well below 2 ∘C and to pursue efforts to limit it to 1.5 ∘C relative to the pre-industrial period. Recent estimates based on population growth and intended carbon emissions from participant countries suggest global warming may exceed this ambitious target. Here we present glacier volume projections for the end of this century, under a...

Université de Fribourg

Whole-body regeneration in the colonial tunicate Botrylloides leachii

Blanchoud, Simon ; Rinkevich, Buki ; Wilson, Megan J.

In: Marine Organisms as Model Systems in Biology and Medicine, 2018, p. 337–355

The colonial marine invertebrate Botrylloides leachii belongs to the Tunicata subphylum, the closest invertebrate relatives to the vertebrate group and the only known class of chordates that can undergo whole-body regeneration (WBR). This dramatic developmental process allows a minute isolated fragment of B. leachii’s vascular system, or a colony excised of all adults, to restore a...

Université de Fribourg

Hematological analysis of the ascidian Botrylloides leachii (Savigny, 1816) during whole-body regeneration

Blanchoud, Simon ; Zondag, Lisa ; Lamare, Miles D. ; Wilson, Megan J.

In: The Biological Bulletin, 2017, vol. 232, no. 3, p. 143–157

Whole-body regeneration (WBR)—the formation of an entire adult from only a small fragment of its own tissue—is extremely rare among chordates. Exceptionally, in the colonial ascidian Botrylloides leachii (Savigny, 1816) a fully functional adult is formed from their common vascular system after ablation of all adults from the colony in just 10 d, thanks to their high blastogenetic...

Université de Fribourg

Necrosaurus or Palaeovaranus? Appropriate nomenclature and taxonomic content of an enigmatic fossil lizard clade (Squamata) = Necrosaurus ou Palaeovaranus ? Nomenclature appropriée et contenu systématique d’un clade énigmatique de lézards fossiles (Squamata)

Georgalis, Georgios L.

In: Annales de Paléontologie, 2017, vol. 103, no. 4, p. 293–303

Necrosaurus cayluxi est un lézard énigmatique du Paléogène des Phosphorites du Quercy, France, qui a été mentionné pour la première fois au 19e siècle. Bien qu’il soit généralement admis que Filhol est l’auteur qui a établi ce taxon, je démontre ici que la paternité devrait en fait en être attribuée à Zittel, ce qui influence également non seulement la nomenclature...

Université de Fribourg

Fossil amphibians and reptiles from Plakias, Crete: A glimpse into the earliest late Miocene herpetofaunas of southeastern Europe

Georgalis, Georgios L. ; Villa, Andrea ; Vlachos, Evangelos ; Delfino, Massimo

In: Geobios, 2016, vol. 49, no. 6, p. 433–444

Fossil amphibians and reptiles from the earliest late Miocene (early Tortonian, MN 9) of Plakias (Crete, Greece) are described in this paper. Most of the material is fragmentary, precluding precise taxonomic assignment. Nevertheless, the herpetofauna of Plakias is here shown to be diverse, comprising at least six different taxa: an alytid anuran, a crocodilian, two turtles (a pan-trionychid...

Université de Fribourg

A dedicated target capture approach reveals variable genetic markers across micro- and macro-evolutionary time scales in palms

de La Harpe, Marylaure ; Hess, Jaqueline ; Loiseau, Oriane ; Salamin, Nicolas ; Lexer, Christian ; Paris, Margot

In: Molecular Ecology Resources, 2019, p. -

Understanding the genetics of biological diversification across micro‐ and macro‐ evolutionary time scales is a vibrant field of research for molecular ecologists as rapid advances in sequencing technologies promise to overcome former limitations. In palms, an emblematic, economically and ecologically important plant family with high diversity in the tropics, studies of diversification at...

Université de Fribourg

Revealing the pseudogap in ${\mathrm{Sr}}_{3}{({\mathrm{Ru}}_{0.985}{\mathrm{Fe}}_{0.015})}_{2}{\mathrm{O}}_{7}$ by optical spectroscopy

Ban, W. J. ; Xu, Bing ; Li, W. H. ; Wang, Y. ; Ge, J. J. ; Li, P. G. ; Yang, R. ; Dai, Y. M. ; Mao, Z. Q. ; Xiao, H.

In: Physical Review B, 2018, vol. 98, no. 20, p. 205111

We report resistivity, magnetization, and optical spectroscopy study on single-crystal sample of Sr3(Ru0.985Fe0.015 )2O7. An upturn is observed in resistivity at about 30 K. Below 30 K, the dip in resistivity R(ω), the suppression in scattering rate 1/τ (ω), the peaklike feature in optical conductivity σ1(ω), and the remainder of spectral weight all suggest the formation of a pseudogap....

Université de Fribourg

Theory of photoinduced ultrafast switching to a spin-orbital ordered hidden phase

Li, Jiajun ; Strand, Hugo U.R. ; Werner, Philipp ; Eckstein, Martin

In: Nature Communications, 2018, vol. 9, no. 1, p. 4581

Photo-induced hidden phases are often observed in materials with intertwined orders. Understanding the formation of these non-thermal phases is challenging and requires a resolution of the cooperative interplay between different orders on the ultra-short timescale. In this work, we demonstrate that non-equilibrium photo-excitations can induce a state with spin-orbital orders entirely...

Université de Fribourg

Lentiviral-mediated let-7d microRNA overexpression induced anxiolytic- and anti-depressant-like behaviors and impaired dopamine D3 receptor expression

Bahi, Amine ; Dreyer, Jean-Luc

In: European Neuropsychopharmacology, 2018, vol. 28, no. 12, p. 1394–1404

Generalized anxiety and major depression disorders (MDD) are severe debilitating mood disorders whose etiology are not fully understood, but growing evidence indicates that microRNAs (miRNAs) might play a key role in their neuropathophysiological mechanisms. In the current study, we investigate the role of Lethal-7 (let-7d) miRNA, and its direct target dopamine D3 receptor (D3R) gain-of-...