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jeune magique et intellig

“疯狂野兽”研究人员发现打破“哺乳动物进化规则”的线索

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研究人员发现的野兽”哺乳动物,大约在6600万年前就同恐龙生活在马达加斯加

Life-like reconstruction of Adalatherium hui from the LateCretaceous of Madagascar. Credit: Denver Museum of Nature & Science/Andrey Atuchin.

据美国石溪大学(Stony Brook University)的研究人员称,它的大小大约相当于一只现代猫或负鼠。

对于当时的哺乳动物来说,这种动物的体积也出奇地大,据信这种哺乳动物的体积与小鼠差不多,并且有望挖洞寻找食物并避免恐龙。

它的正式名称为Adalatherium hui - 来自马达加斯加语,希腊语为“疯狂的野兽”。

Skeleton of Adalatherium hui, a new gondwanatherian mammal from the Late Cretaceous of Madagascar, in sandstone matrix. Photographer – Marylou Stewart (deceased and therefore no e-mail address). Credit: Nature Research.

这只动物大约只有猫的大小。

大卫·克劳斯(David Krause)教授说道:“我们对所有活着的和灭绝的哺乳动物的骨骼解剖学,很难想象像Adalatherium这样的哺乳动物可能已经进化了;它弯曲甚至打破了许多规则。”

尽管重建过程显示出这种疯狂野兽的外观类似于獾,但科学家称,这种动物的骨骼实际上是“古怪的”-鼻子具有原始特征,而现代哺乳动物在“一亿年”前尚未有此特征。

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