Belemnite extinction and the origin of modern cephalopods 35 m.y. prior to the Cretaceous-Paleogene event

Belemnite extinction and the origin of modern cephalopods 35 m.y. prior to the Cretaceous-Paleogene event
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白垩纪-古近纪事件前35米的箭石灭绝和现代头足类动物的起源

DOI:
10.1130/g31724.1
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发表时间:
2011
期刊:
影响因子:
5.8
通讯作者:
Terabe
Terabe
中科院分区:
地球科学1区
文献类型:
--
作者:
Mutterlose;Tanabe;Misaki;Terabe

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Belemnites是一个非常成功的中生代头足类动物群,在白垩纪海洋中蓬勃发展,直到白垩纪-古近纪事件,当他们成为全球灭绝。在这一事件之后,现代类型的头足类动物(鱿鱼、墨鱼、章鱼)在新生代辐射到所有海洋。然而,在北太平洋,从箭石到现代类型的头足类的更替约为3500万年。在白垩纪-古近纪事件之前,记录了比以前认为的更复杂的头足类动物进化历史。在这里,我们表明,现代类型的头足类的起源和繁荣整个晚白垩世在北太平洋。白垩纪中期的头足类动物更替是由冷却和白令海峡的关闭引起的,这导致了该地区随后的动物群隔离。在白垩纪晚期,快速游动的箭石的前生态位被现代类型的头足类动物所占据,它们是地方性进化的。白垩纪-古近纪事件只允许现代类型的头足类动物在全球范围内传播,并接管了以前由箭石占据的壁龛。
Belemnites, a very successful group of Mesozoic cephalopods, flourished in Cretaceous oceans until the Cretaceous−Paleogene event, when they became globally extinct. Following this event the modern types of cephalopods (squids, cuttlefish, octopus) radiated in the Cenozoic in all oceans. In the North Pacific, however, a turnover from belemnites to the modern types of cephalopods about 35 m.y. before the Cretaceous−Paleogene event documents a more complex evolutionary history of cephalopods than previously thought. Here we show that the modern types of cephalopods originated and prospered throughout the Late Cretaceous in the North Pacific. The mid-Cretaceous cephalopod turnover was caused by cooling and the closure of the Bering Strait, which led to a subsequent faunal isolation of this area. In the Late Cretaceous the former niches of the fast-swimming belemnites were taken over by the modern types of cephalopods, which evolved endemically. The Cretaceous−Paleogene event only allowed the modern types of cephalopods to spread globally and to take over the niches previously held by belemnites.
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