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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

A new species of baenid turtle from the Early Cretaceous Lakota Formation of South Dakota

Joyce, Walter G. ; Rollot, Yann ; Cifelli, Richard L.

In: Fossil Record, 2020, vol. 23, no. 1, p. 1–13

Baenidae is a clade of paracryptodiran turtles known from the late Early Cretaceous to Eocene of North America. The proposed sister-group relationship of Baenidae to Pleurosternidae, a group of turtles known from sediments dated as early as the Late Jurassic, suggests a ghost lineage that crosses the early Early Cretaceous. We here document a new species of paracryptodiran turtle, Lakotemys...

Université de Fribourg

First fossil frog from Antarctica: implications for Eocene high latitude climate conditions and Gondwanan cosmopolitanism of Australobatrachia

Mörs, Thomas ; Reguero, Marcelo ; Vasilyan, Davit

In: Scientific Reports, 2020, vol. 10, p. 5051

Cenozoic ectothermic continental tetrapods (amphibians and reptiles) have not been documented previously from Antarctica, in contrast to all other continents. Here we report a fossil ilium and an ornamented skull bone that can be attributed to the Recent, South American, anuran family Calyptocephalellidae or helmeted frogs, representing the first modern amphibian found in Antarctica. The two bone...

Université de Fribourg

Subfossil lemur discoveries from the Beanka Protected Area in western Madagascar

Burney, David A. ; Andriamialison, Haingoson ; Andrianaivoarivelo, Radosoa A. ; Bourne, Steven ; Crowley, Brooke E. ; Boer, Erik J. de ; Godfrey, Laurie R. ; Goodman, Steven M. ; Griffiths, Christine ; Griffiths, Owen ; Hume, Julian P. ; Joyce, Walter G. ; Jungers, William L. ; Marciniak, Stephanie ; Middleton, Gregory J. ; Muldoon, Kathleen M. ; Noromalala, Eliette ; Pérez, Ventura R. ; Perry, George H. ; Randalana, Roger ; Wright, Henry T.

In: Quaternary Research, 2020, vol. 93, no. 1, p. 187–203

A new fossil site in a previously unexplored part of western Madagascar (the Beanka Protected Area) has yielded remains of many recently extinct vertebrates, including giant lemurs (Babakotia radofilai, Palaeopropithecus kelyus, Pachylemur sp., and Archaeolemur edwardsi), carnivores (Cryptoprocta spelea), the aardvark-like Plesiorycteropus sp., and giant ground cuckoos (Coua). Many of these...