Results 101 to 110 of about 88,912 (269)

Faune de vertébrés de Betfia-XII (Bihor, Roumanie) et son âge chronologique. Étude des Arvicolidés (Rodentia)

open access: yesTravaux de l'Institut de Speologie Emile Racovitza, 2007
On présente la faune de Mammifères découverte dans le remplissage d’une fissure karstique, Betfia-XII, fissure ouverte par l’exploitation des calcaires barrémiens-aptiens au voisinage du village de Betfia (dép. de Bihor). Cette faune renferme 17 espèces,
ELENA TERZEA
doaj  

Análisis cladístico, paleoecología y extinción de la subfamilia Pichipilinae (Marsupialia, Caenolestidae)

open access: yesEstudios Geologicos, 1997
La subfamilia Pichipilinae es un grupo monofilético que comprende tres géneros y seis especies de pequeños marsupiales extinguidos, que habitaron el extremo austral de América del Sur desde la «Edad-mamífero» Colhuehuapense (Mioceno temprano) hasta la ...
E. Ortiz Jaureguizar
doaj   +1 more source

Mouse genome engineering uncovers 18 genes dispensable for male reproduction

open access: yesAndrology, EarlyView.
Abstract Background Male infertility is an intricate multifactorial disease involving the interplay between genetic and environmental factors. Genetic anomalies account for more than 15% of all male infertility cases; however, diagnosing them exhibits enormous challenges due to variable symptomatic presentations and limited knowledge of gene functions.
Hsin‐Yi Chang   +7 more
wiley   +1 more source

Mamíferos no voladores en un campus universitario de la Orinoquia colombiana

open access: yesMammalogy Notes, 2020
En la Orinoquia colombiana la transformación del paisaje es evidente y se ha sugerido que los campus de instituciones educativas ayudan a conservar la biodiversidad.
Cesar Alfonso, Francisco Sánchez
doaj   +1 more source

An Introduction to the Osteology of the Mammalia

open access: yesNature, 1870
PROF. FLOWER'S valuable “Osteology of the Mammalia” holds so high a position among scientific manuals that the appearance of a second edition requires but a passing notice from us.
W. H. Flower
semanticscholar   +1 more source

First record of Eptesicus brasiliensis argentinus Thomas, 1920 (Chiroptera, Vespertilionidae) in Entre Ríos province, Argentina [PDF]

open access: yes, 2018
Here, we present the first record of Eptesicus brasiliensis argentinus Thomas, 1920 for the province of Entre Ríos, Argentina. This subspecies was originally described as a full species (Eptesicus argentinus) based on its morphological features that ...
Barquez, Ruben Marcos   +3 more
core   +1 more source

Review of the tetrapod skull–neck boundary: implications for the evolution of the atlas–axis complex

open access: yesBiological Reviews, EarlyView.
ABSTRACT This review describes variation in modern and fossil occiput–atlas–axis complex anatomy of total group Tetrapoda with the aim of documenting the range of structural variation throughout their evolutionary history to establish grounds for comparison of the complex between tetrapod clades.
Dana E. Korneisel, Hillary C. Maddin
wiley   +1 more source

El registro más antiguo de Hippidion Owen, 1869 (Mammalia, Perissodactyla) en América del Sur

open access: yesEstudios Geologicos, 1998
Se confirma la presencia de Hippidion devillei en la localidad de Esquina Blanca (Jujuy, Argentina) y se sitúa, a partir de los datos paleomagnéticos, en una edad cercana al límite Matuyama/Gauss.
J. L. Prado   +2 more
doaj   +1 more source

Dental and Mandibular Morphologies of Arboroharamiya (Haramiyida, Mammalia): A Comparison with Other Haramiyidans and Megaconus and Implications for Mammalian Evolution

open access: yesPLoS ONE, 2014
Background Two recent studies published in the same issue of Nature reached conflicting conclusions regarding the phylogeny of early mammals: One places the clade containing haramiyidans and multituberculates within the Mammalia and the other separates ...
Jin Meng   +4 more
semanticscholar   +1 more source

New Data on Armadillos (Xenarthra: Dasypodidae) for Central Patagonia, Argentina [PDF]

open access: yes, 2010
Armadillos represent the most diverse family of xenarthrans. Although many studies have been done on these mammals, several topics, such as their local distribution, natural history, behavioral ecology and conservation, remain poorly known ...
Abba, Agustin Manuel   +2 more
core   +2 more sources

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