Abstract Ray-finned fishes comprise nearly half of extant vertebrate species and include several ancient lineages with fossil records that stretch over 200 Myr in time. One these old clades, the sturgeons paddlefishes, is distributed across Northern Hemisphere includes some largest known freshwater fishes. Yet, record this lineage (Acipenseriformes) poor compared to similarly ray-finned fish cl...

Sediment discharge events in the lower basin of Chubut River (Patagonia, Argentina) associated with rainfall generate serious problems for drinking water purification more than 250,000 inhabitants and support livestock farming activity about 42,000 ha region. Identifying areas potential sediment contribution to conditions necessary erosion transfer is vital importance mitigate negative impact i...

As a result of the continued depletion shallow ore resources, there has been renewed focus on tectonic preservation mineralized systems. Specifically, it is vital to constrain post-mineralization exhumation and history existing economic deposits, in order identify new regions suitable for mineral exploration. In this study, we present results from apatite U-Pb, fission-track (U-Th-Sm)/He thermo...

BACKGROUND Bothremydidae is a clade of extinct pleurodiran turtles known from the Cretaceous to Paleogene of Africa, Europe, India, Madagascar, and North and South America. The group is most diverse during the Late Cretaceous to Paleogene of Africa. Little is known, however, about the early evolution of the group. METHODS We here figure and describe a fossil turtle from early Late Cretaceous ...

s with Program, v. 22,7, p. A350. GREENWOOD, D.R., and CHRISTOPHEL, D.C., 2004, The origins and Tertiary history of Australian ‘‘Tropical’’ rainforests: in Bermingham, E., Dick, C., and Moritz, C., eds., Tropical Rainforests: Past, Present, and Future: Chicago University Press, Chicago. GREENWOOD, D.R., MOSS, P.T., ROWETT, A.I., VADALA, A.J., and KEEFE, R.L., 2003, Plant communities and climate...

The fossil record of fishes from the Farola de Monte Hermoso locality (lower Pliocene) in southern Buenos Aires province, Argentina, shows an unusual composition. at boundary Brazilian Ichthyogeographic Realm. However, its is composed that are not necessarily related to lineages, namely indeterminate siluriforms, trichomycterid catfishes, and percomorphaceans. aim present contribution describe ...

The megafossil record of Chamaecyparis (Cupressaceae) in the Northern Hemisphere, especially that in Europe, is reviewed with the aim of gaining a better understanding of the biogeographic history of this genus and providing an explanation of the causes of eastern Asian and western and eastern North American intercontinental disjunction of extant members. The fossil data available favor the hyp...

Mimotonids share their closest affinity with lagomorphs and were a rare and endemic faunal element of Paleogene mammal assemblages of central Asia. Here we describe a new species, Mimolagus aurorae from the Middle Eocene of Nei Mongol (China). This species belongs to one of the most enigmatic genera of fossil Glires, previously known only from the type and only specimen from the early Oligocene...