アメリカ自然史博物館のインスタグラム(amnh) - 9月13日 08時47分

It's time for Trilobite Tuesday! Despite being covered in thick calcite carapaces, which often gave them the appearance of undersea battle tanks, trilobites were, in fact, rather delicately constructed creatures. Evidence of this apparent design “flaw” is pervasive throughout the fossil record, where disarticulated trilobite fragments, as seen in this Dalmaniites slab from Sweden, far outnumber the remains of complete specimens. In a number of fossiliferous biozones around the globe, including those in British Columbia, Morocco, and the Czech Republic, independent pygidia, cephala, and thoracic segments virtually litter the sedimentary strata…with often nary an articulated trilobite to be found. #trilobitetuesday #trilobite #trilobites #fossil #fossils #amnh #insideamnh #naturalhistory

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