Université de Fribourg

A Review of the fossil record of turtles of the clade Baenidae

Joyce, Walter G. ; Lyson, Tyler R.

In: Bulletin of the Peabody Museum of Natural History, 2015, vol. 56, no. 2, p. 147–183

The fossil record of the turtle clade Baenidae ranges from the Early Cretaceous (Aptian—Albian) to the Eocene. The group is present throughout North America during the Early Cretaceous, but is restricted to the western portions of the continents in the Late Cretaceous and Paleogene. No credible remains of the clade have been reported outside of North America to date. Baenids were warmadapted...

Université de Fribourg

A Review of the Fossil Record of Turtles of the Clades Platychelyidae and Dortokidae

Cadena, Edwin ; Joyce, Walter G.

In: Bulletin of the Peabody Museum of Natural History, 2015, vol. 56, no. 1, p. 3–20

The fossil record of platychelyid turtles expands from the Late Jurassic (Oxfordian) of Cuba to the Early Cretaceous (Valanginian) of Colombia. Platychelyids were adapted to freshwater to coastal environments. Current phylogenies confidently suggest that platychelyids are situated along the stem lineage of crown Pleurodira. A taxonomic review of the group concludes that of six named...

Université de Fribourg

A review of the fossil record of turtles of the clade Pan-Carettochelys

Joyce, Walter G.

In: Bulletin of the Peabody Museum of Natural History, 2014, vol. 55, no. 1, p. 3–33

Turtles of the total clade Pan-Carettochelys have a relatively poor fossil record that extends from the Early Cretaceous. The clade is only found in Asia during the Cretaceous, but spreads to Europe and North America during the Eocene. Neogene finds are restricted to Europe, Africa and Australia, whereas the only surviving species, Carettochelys insculpta, lives in New Guinea and the Northern...

Université de Fribourg

Paleoecology of Pennsylvanian phylloid algal buildups in south Guizhou, China

Enpu, Gong ; Samankassou, Elias ; Changqing, Guan ; Yongli, Zhang ; Baoliang, Sun

In: Facies, 2007, vol. 53, no. 4, p. 615-623

Pennsylvanian phylloid algal reefs are widespread and well exposed in south Guizhou, China. Here we report on reefs ranging from 2 to 8 m thickness and 30–50 m lateral extension. Algae, the main components, display a wide spectrum of growth forms, but are commonly cyathiform (cup-shaped) and leaf-like (undulate plates). The algal reef facies is dominated by boundstone. Algal thalli form a...

Université de Fribourg

Sédimentologie, paléontologie et paléoenvironnements côtiers de la région de Porrentruy (Sud-Rhénan, Paléogène, Jura, Suisse): implications géodynamiques

Picot, Laurent ; Becker, Damien ; Lapaire, Frédéric ; Ustaszewski, Kamil ; Hug, Wolfgang A. ; Berger, Jean-Pierre

In: Eclogae Geologicae Helvetiae, 2005, vol. 98, no. 2, p. 281-296

Located in the distal part of the Swiss Molasse Basin and in the southern extension of the Rhine Graben, the conglomeratic deposits belonging to the Gompholithes & Conglomérats stratigraphic group have been the object of detailed sedimentological and paleontological studies. The great number of outcrops that came into sight during the building works of the Transjurane highway in the vicinity...

Université de Fribourg

Paleoecological control of ostracode distribution in a Pennsylvanian Auernig cyclothem of the Carnic Alps, Austria

Fohrer, Beate ; Samankassou, Elias

In: Palaeogeography, Palaeoclimatology, Palaeoecology, 2005, vol. 225(1-4), p. 317

Pennsylvanian (Kasimovian) ostracodes from the lower part of the Auernig Group, Carnic Alps, Austria, inhabited a shallow-marine and open-marine environment. Paleontological investigations of two ostracode faunas brought significant differences between the ostracode assemblage of the Anthracoporella (dasycladalean algae) mound environment and the one from the overlying nodular limestone....