نتایج جستجو برای: paleogene
تعداد نتایج: 1290 فیلتر نتایج به سال:
Extant Bauhinia (Leguminosae) is a genus of 300 species trees, shrubs, and lianas, widely distributed in pantropical areas, but its diversification history southeastern Asia, one centers highest diversity, remains unclear. We report new fossils three with cuticular preservation from the Paleogene Puyang Basin, southwestern China. Our finding likely extends emergence Asia to late Eocene. Togethe...
BACKGROUND The global movement and speciation of fungal plant pathogens is important, especially because of the economic losses they cause and the ease with which they are able to spread across large areas. Understanding the biogeography and origin of these plant pathogens can provide insights regarding their dispersal and current day distribution. We tested the hypothesis of a Gondwanan origin...
چکیده ندارد.
Mitchell et al. argue that divergence-time estimates for our avian phylogeny were too young because of an "inappropriate" maximum age constraint for the most recent common ancestor of modern birds and that, as a result, most modern bird orders diverged before the Cretaceous-Paleogene mass extinction event 66 million years ago instead of after. However, their interpretations of the fossil record...
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