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Mostrando ítems 3901-3910 de 10376
Glaciations in Patagonia and Tierra del Fuego during the Ensenadan Stage/Age (Early Pleistocene-earliest Middle Pleistocene)
(Pergamon-Elsevier Science Ltd, 2009-03)
While the Ensenadan Stage/Age (ca. 2.1 to 0.5 Ma) was characterized by certain mammal associations in the Pampean plains, the Andean ranges of Patagonia and Tierra del Fuego, their piedmont areas and, in some cases, the ...
A taxonomic and biogeographic review of the fossil tapirs from Bolivia
(Polish Academy of Sciences. Institute of Paleobiology, 2014-01)
Fossil remains of South American tapirs are often fragmentary and scarce compared with those of other mammals that entered South America during the “Great American Biotic Interchange”. Here, we review and add to the ...
A new horned and long-necked herbivorous stem-archosaur from the Middle Triassic of India
(Nature Publishing Group, 2017-12)
The early evolution of archosauromorphs (bird- A nd crocodile-line archosaurs and stem-archosaurs) represents an important case of adaptive radiation that occurred in the aftermath of the Permo-Triassic mass extinction. ...
The Amblyomma (Acari: Ixodida: Ixodidae) of Mexico: identification keys, distribution and hosts
(Magnolia Press, 2011-08)
Taxonomic keys, distributional data and hosts are provided for the 26 Amblyomma species known from Mexico. Members of this genus have been collected in 30 of Mexico’s 32 states and are associated with 43 nominal vertebrate ...
Mammalia, Didelphimorphia, Chiroptera, and Rodentia, Parque Nacional Chaco and Capitán Solari, Chaco province, Argentina
(Centro de Referência em Informação Ambiental, 2009-03)
We studied the small mammal assemblage (bats, marsupials and rodents) of Parque Nacional Chaco and Capitán Solari (Chaco Province, Argentina) based on captures and analysis of owl pellets. Twenty-one species were recorded ...
Dynamic Role of Adult-Born Dentate Granule Cells in Memory Processing
(Current Biology, 2015-06)
Throughout the adult life of all mammals including humans, new neurons are incorporated to the dentate gyrus of the hippocampus. During a critical window that lasts about two weeks, adult-born immature neurons are more ...
Taxonomic revision of the flea genus AgastopsyllaJordan & Rothschild 1923 (Siphonaptera: Ctenophthalmidae)
(Academia Brasileira de Ciencias, 2020-04)
Fleas of Argentina are receiving renewed systematic interest, but the identification of many species associated with small mammals can be problematic. We review the taxonomy of the flea genus Agastopsylla including the ...
An insect-eating bat (Mammalia: Chiroptera) from the Pleistocene of Argentina
(Center for the Study of the First Americans, 2003-12)
Compared with other mammals, the fossil record for bats (Mammalia: Chiroptera) is sparse. Among the reasons proposed for this are lack of fossilization, poor preservation of bats bones, and bias introduced by collecting ...
Intrinsic Disorder in the human papillomavirus E7 protein
(John Wiley & Sons Inc, 2012)
Papillomaviruses (PVs) are a group of small, nonenveloped, double-stranded DNA viruses, which infect the skin and mucous epithelia of reptiles, birds, and mammals, and have recently been classified as a separate virus ...
Sciuromorphy outside rodents reveals an ecomorphological convergence between squirrels and extinct South American ungulates
(Nature Publishing Group, 2019-06)
Notoungulates were a diverse group of South American ungulates that included the rodent-like typotherians. However, they are typically compared with other ungulates and interpreted as grazers. Here we present the first ...