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Université de Fribourg

The record of Deinotheriidae from the Miocene of the Swiss Jura Mountains (Jura Canton, Switzerland)

Gagliardi, Fanny ; Maridet, Olivier ; Becker, Damien

In: bioRxiv, 2021, p. 244061

The Miocene sands of the Swiss Jura Mountains, long exploited in quarries for the construction industry, have yielded abundant fossil remains of large mammals. Among Deinotheriidae (Proboscidea), two species, Prodeinotherium bavaricum and Deinotherium giganteum, had previously been identified in the Delémont valley, but never described. A third species, Deinotherium levius, from the locality of...

Haute école de gestion de Genève

The implication of the new labor clauses in the USMCA on labor market and trade between the United States, Mexico and Canada

Stäuble, Mathieu ; Matile, Laurent (Dir.)

Mémoire de bachelor : Haute école de gestion de Genève, 2020 ; TDIBM 93.

The North American continent has implemented different free trade agreements throughout the years. From the Canadian-United States Free Trade Agreement (CUSFTA) reached in 1989, between Canada and the United States and quickly replaced by the North American Free Trade Agreement (NAFTA) in 1994 with the addition of Mexico to the agreement. After 26 years of existence and divergent opinions...

Université de Fribourg

Dental anomaly in a middle Miocene fossil of the genus Spermophilinus (Rodentia, Sciuridae) from southern Germany

Prieto, Jérôme ; Rummel, Michael ; Peláez-Campomanes, Pablo ; Vasilyan, Davit

In: Fossil Imprint, 2020, vol. 76, no. 1, p. 174-180

The maxillary presented in this work has been excavated in the middle Miocene karst filling Petersbuch 136 (Germany, Bavaria) and shows the oldest evidence of dental anomaly in a sciurid. The aberrant morphology, probably hyperdontia or no replacement of roots of deciduous teeth, affects the area of the P3, a tooth that is generally not well documented in the Spermophilinus record.

Université de Fribourg

Disproportionate extinction of South American mammals drove the asymmetry of the Great American Biotic Interchange

Carrillo, Juan D. ; Faurby, Søren ; Silvestro, Daniele ; Zizka, Alexander ; Jaramillo, Carlos ; Bacon, Christine D. ; Antonelli, and Alexandre

In: Proceedings of the National Academy of Sciences, 2020, vol. 117, no. 42, p. 26281–26287

The biological interchange between North and South America associated with the formation of the Isthmus of Panama is key to defining current gradients of species diversity. A major gap in our understanding of the interchange is its asymmetry, where mammals of North American origin attained higher diversity in South America than vice versa. The prevailing view is that this asymmetry resulted...

Université de Fribourg

The Eomyidae in Asia: Biogeography, diversity and dispersals

Kimura, Yuri ; Casanovas-Vilar, Isaac ; Maridet, Olivier ; Kalthoff, Daniela C. ; Mörs, Thomas ; Tomida, Yukimitsu

In: Fossil Imprint, 2020, vol. 76, no. 1, p. 181-200

In Asia, the first find of an eomyid rodent was reported almost one century after the first studies of the family Eomyidae in North America and Europe. Since then, eomyid rodents have been increasingly found in Asia particularly over the past two decades. Here, we review the Asian record of this family at the genus level. Currently, 22 species within 14 genera were reported from Asia,...

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...