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Mostrando ítems 21-30 de 78
La homología del proceso ascendente del astrágalo en aves: un caso de reversión evolutiva
(Universidad de ChileUniversidad de Chile, 2014)
Morfologia da cloaca e do aparelho copulador de Cairina Moschata (Anatidae: Anseriformes) com implicações sistemáticas
(Universidade Federal de Minas GeraisUFMG, 2015-03-30)
The cloacae and the phallus of 12 specimens of the Muscovy duck Cairina moschata were studied in order to identify and describe the main morphological characteristics, determine its mechanism of erection of the phallus and ...
Mass extinctions drove increased global faunal cosmopolitanism on the supercontinent Pangaea
(Nature Publishing Group, 2017-12)
Mass extinctions have profoundly impacted the evolution of life through not only reducing taxonomic diversity but also reshaping ecosystems and biogeographic patterns. In particular, they are considered to have driven ...
Carotid circulation in amniotes and its implications for turtle relationships
(E Schweizerbartsche Verlags, 2011-09)
The pattern of carotid blood vessel circulation in the skull of amniote vertebrates is reviewed, considering both fossil and extant taxa. Based on comparisons of early synapsids, mammaliaforms, eureptiles, parareptiles, ...