Orthocerida is an order of extinct Orthoceratoid cephalopods also known as the Michelinocerda that lived from the Early Ordovician (490 million years ago) possibly to the ...
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Late Triassic (240 million years ago). A fossil found in the Caucasus suggests they may even have survived until the Early Cretaceous (150 million years ago). They were most common however from the Ordovician to the Devonian. - Wikipedia (en), 16.07.2017