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Université de Fribourg

The past and future human impact on mammalian diversity

Andermann, Tobias ; Faurby, Søren ; Turvey, Samuel T. ; Antonelli, Alexandre ; Silvestro, Daniele

In: Science Advances, 2020, vol. 6, no. 36, p. eabb2313

To understand the current biodiversity crisis, it is crucial to determine how humans have affected biodiversity in the past. However, the extent of human involvement in species extinctions from the Late Pleistocene onward remains contentious. Here, we apply Bayesian models to the fossil record to estimate how mammalian extinction rates have changed over the past 126,000 years, inferring...

Université de Fribourg

Preliminary observations on the bone histology of the Middle Triassic pseudosuchian archosaur Batrachotomus kupferzellensis reveal fast growth with laminar fibrolamellar bone tissue

Klein, Nicole ; Foth, Christian ; Schoch, Rainer R.

In: Journal of Vertebrate Paleontology, 2017, vol. 37, no. 4, p. e1333121

The bone tissue of femur, rib, and gastralia from three different individuals of the Middle Triassic pseudosuchian Batrachotomus kupferzellensis from southern Germany is studied. The femoral bone tissue comprises laminar fibrolamellar bone tissue throughout and is stratified by three annual growth cycles, indicating that the individual died early in its fourth year of life, at which time it...

Université de Fribourg

Unappreciated diversification of stem archosaurs during the Middle Triassic predated the dominance of dinosaurs

Foth, Christian ; Ezcurra, Martín D. ; Sookias, Roland B. ; Brusatte, Stephen L. ; Butler, Richard J.

In: BMC Evolutionary Biology, 2016, vol. 16, p. 188

Archosauromorpha originated in the middle–late Permian, radiated during the Triassic, and gave rise to the crown group Archosauria, a highly successful clade of reptiles in terrestrial ecosystems over the last 250 million years. However, scientific attention has mainly focused on the diversification of archosaurs, while their stem lineage (i.e. non- archosaurian archosauromorphs) has often...

Université de Fribourg

The origin of turtles: A paleontological perspective

Joyce, Walter G.

In: Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, 2015, p. -

The origin of turtles and their unusual body plan has fascinated scientists for the last two centuries. Over the course of the last decades, a broad sample of molecular analyses have favored a sister group relationship of turtles with archosaurs, but recent studies reveal that this signal may be the result of systematic biases affecting molecular approaches, in particular sampling, non-randomly...

Bibliothèque cantonale jurassienne

The socio-sexual behaviour of extant archosaurs : implications for understanding dinosaur behaviour

Isles, Timothy E.

In: Historical biology : an international journal of paleobiology, 2009, vol. 21, no. 3-4, p. 139-214