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在南极西摩岛始新统上部岩石中发现属于软体动物门、棘皮动物门和节肢动物门的五个纲11属化石,原先仅知产于新生代晚期中纬度地区,这一发现表明,南半球高纬度地区是各类生物起源和扩散的中心。现代中纬度深水和浅水中的生物种类,其先驱在低纬度地区环境适合它们扩散之前,已在高纬度地区演化和繁盛。南极海生无脊椎动物的这些观察,证实了最近在北极观察到的陆生哺乳动物和植物的现象。
The five eleven fossils belonging to the Mollusc, Echinodermata and Arthropoda found in the Uppermost Epicocene rocks on the Seymour Islands, Antarctica, were previously only known to occur in the late Cenozoic mid-latitudes. This finding indicates that in the southern hemisphere High latitudes are the center of origin and proliferation of all kinds of creatures. Modern pioneers of mid- latitudes of deep and shallow water, whose precursors have evolved and thrived in high latitudes before low-latitude environments are suitable for their diffusion. These observations of Antarctic marine invertebrates confirm the recent phenomenon of terrestrial mammals and plants observed in the Arctic.