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Université de Fribourg

Birds have peramorphic skulls, too: anatomical network analyses reveal oppositional heterochronies in avian skull evolution

Plateau, Olivia ; Foth, Christian

In: Communications Biology, 2020, vol. 3, no. 1, p. 195

In contrast to the vast majority of reptiles, the skulls of adult crown birds are characterized by a high degree of integration due to bone fusion, e.g., an ontogenetic event generating a net reduction in the number of bones. To understand this process in an evolutionary context, we investigate postnatal ontogenetic changes in the skulls of crown bird and non-avian theropods using anatomical...

Université de Fribourg

Feeding biomechanics suggests progressive correlation of skull architecture and neck evolution in turtles

Ferreira, Gabriel S. ; Lautenschlager, Stephan ; Evers, Serjoscha W. ; Pfaff, Cathrin ; Kriwet, Jürgen ; Raselli, Irena ; Werneburg, Ingmar

In: Scientific Reports, 2020, vol. 10, p. 5505

The origin of turtles is one of the most long-lasting debates in evolutionary research. During their evolution, a series of modifications changed their relatively kinetic and anapsid skull into an elongated akinetic structure with a unique pulley system redirecting jaw adductor musculature. These modifications were thought to be strongly correlated to functional adaptations, especially to bite...

Université de Fribourg

Early Agenian rhinocerotids from Wischberg (Canton Bern, Switzerland) and clarification of the systematics of the genus Diaceratherium

Jame​, Claire ; Tissier​​, Jérémy ; Maridet, Olivier ; Becker, Damien

In: PeerJ, 2019, vol. 7, p. e7517

Background: Wischberg is a Swiss locality in Bern Canton which has yielded numerous vertebrates remains from the earliest Miocene (= MN1). It has a very rich faunal diversity, one of the richest in Switzerland for this age. Among all the mammals reported in the original faunal list 70 years ago, three rhinocerotid species were identified. The material consists of two fragmentary skulls,...

Université de Fribourg

Progressively excluding mammals of different body size affects community and trait structure of ground beetles

Wang, Xiaowei ; Steiner, Magdalena ; Schütz, Martin ; Vandegehuchte, Martijn L. ; Risch, Anita C.

In: Oikos, 2018, vol. 127, no. 10, p. 1515–1525

Mammalian grazing induces changes in vegetation properties in grasslands, which can affect a wide variety of other animals including many arthropods. However, the impacts may depend on the type and body size of these mammals. Furthermore, how mammals influence functional trait syndromes of arthropod communities is not well known. We progressively excluded large (e.g. red deer, chamois),...

Université de Fribourg

A description of the skull of eubaena cephalica (hay, 1904) and new insights into the cranial circulation and innervation of baenid turtles

Rollot, Yann ; Lyson, Tyler R. ; Joyce, Walter G.

In: Journal of Vertebrate Paleontology, 2018, vol. 38, no. 3, p. e1474886

The internal carotid system has played an important role in the systematics of fossil turtles, including baenids. A new, almost perfectly preserved specimen of Eubaena cephalica provides an opportunity to explore for the first time the cranial circulation and innervation of this taxon using CT (computed tomography) scans. We here document that the skull possesses a well-developed, branching...

Consortium of Swiss Academic Libraries

Anatomical landmarks for transnasal endoscopic skull base surgery

Sandu, Kishore ; Monnier, Philippe ; Pasche, Philippe

In: European Archives of Oto-Rhino-Laryngology, 2012, vol. 269, no. 1, p. 171-178

Université de Fribourg

Population genomic analysis of elongated skulls reveals extensive female-biased immigration in Early Medieval Bavaria

Veeramah, Krishna R. ; Rott, Andreas ; Groß, Melanie ; Dorp, Lucy van ; López, Saioa ; Kirsanow, Karola ; Sell, Christian ; Blöcher, Jens ; Wegmann, Daniel ; Link, Vivian ; Hofmanová, Zuzana ; Peters, Joris ; Trautmann, Bernd ; Gairhos, Anja ; Haberstroh, Jochen ; Päffgen, Bernd ; Hellenthal, Garrett ; Haas-Gebhard, Brigitte ; Harbeck, Michaela ; Burger, Joachim

In: Proceedings of the National Academy of Sciences, 2018, p. 201719880

Modern European genetic structure demonstrates strong correlations with geography, while genetic analysis of prehistoric humans has indicated at least two major waves of immigration from outside the continent during periods of cultural change. However, population-level genome data that could shed light on the demographic processes occurring during the intervening periods have been absent....

Université de Fribourg

The posterior ridge of the greater tuberosity of the humerus: a suitable landmark for the posterior approach to the shoulder joint?

Grob, Karl ; Monahan, Rebecca Helen ; Manestar, Mirjana ; Filgueira, Luis ; Zdravkovic, Vilijam

In: Journal of Shoulder and Elbow Surgery, 2018, vol. 27, no. 4, p. 635–640

The purpose of this study was to evaluate the posterior ridge of the greater tuberosity, a palpable prominence during surgery, as a landmark for the posterior approach to the glenohumeral joint.Methods: Twenty-five human cadaveric shoulders were dissected. In 5 cases, a full-thickness rotator cuff tear was present. The posterior surgical anatomy was defined, and the distance from the ridge to...