アメリカ自然史博物館のインスタグラム(amnh) - 4月19日 06時51分

It's time for #TrilobiteTuesday! Trilobites were an amazingly cosmopolitan class. These creatures were capable of surviving in just about any marine environment that became available to them. Evidence of their adaptability is pervasive. In fact, the fossilized remains of trilobites have been discovered on every one of Earth's continents—from the rugged steppes of Siberia to the coastal cliffs of Australia to the heartland of North America. Sometimes, however, the trilobite fossils we now uncover on landmasses spaced randomly around the globe provide a rather distorted view of the oceanic ranges that these species may have actually enjoyed during their lengthy trek through the Paleozoic. Due to Plate Tectonics, species such as this Olenellus that may have shared a similar oceanic environment half a billion years ago now find their fossilized remains separated by thousands of miles. #fossil #trilobite

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