نتایج جستجو برای: middle miocene
تعداد نتایج: 160101 فیلتر نتایج به سال:
Nemopteridae are a charismatic family of lacewings characterised by uniquely extended hind wings. They are an ancient widespread group in the drier regions of the world. The family comprises two subfamilies, Crocinae (thread-wings) and Nemopterinae (spoon- and ribbon-wings). The present distribution of the family has been largely influenced by the vicariant events of plate tectonics, resulting ...
The Antarctic Peninsula is considered to be the last region of Antarctica to have been fully glaciated as a result of Cenozoic climatic cooling. As such, it was likely the last refugium for plants and animals that had inhabited the continent since it separated from the Gondwana supercontinent. Drill cores and seismic data acquired during two cruises (SHALDRIL I and II) in the northernmost Penin...
Four groups of equids, "Anchitheriinae," Merychippine-grade Equinae, Hipparionini, and Equini, coexisted in the middle Miocene, but only the Equini remains after 16 Myr of evolution and extinction. Each group is distinct in its occlusal enamel pattern. These patterns have been compared qualitatively but rarely quantitatively. The processes influencing the evolution of these occlusal patterns ha...
Sea surface temperatures (SSTs) of the tropical Pacific Ocean exert powerful controls on regional and global climates. Previous studies have suggested that during warm climate phases, east-west temperature gradient collapsed. To date, there has been no high-resolution reconstruction sea conditions in both east west Miocene Climate Optimum (MCO) across middle transition (MMCT); therefore, our un...
Madagascar is home to many endemic plant and animal species owing its ancient isolation from other landmasses. This unique fauna includes several lineages of termites, a group insects known for their key role in organic matter decomposition terrestrial ecosystems. How when termites colonised remains unknown. In this study, we used 601 mitochondrial genomes, 93 which were generated Malagasy samp...
Pollen analysis of Miocene and Pliocene sediments from southeastern Europe and the northeastern Mediterranean is represented in pollen synthetic diagrams based on ecological criteria in order to clearly visualize changes in the composition and structure of the vegetation through time. New pollen data, together with abundant existing palynological information from this area, show a progressive r...
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