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Earliest siphuncle-bearing cephalopod from the early Cambrian - Nature
Early Cambrian Eoceras shaanxiense gen. et sp. nov. preserves septa and a segmented tube resembling a primordial siphuncle, extending cephalopod origins and revealing early assembly of chambered shells used for buoyancy regulation.
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Earliest siphuncle-bearing cephalopod from the early Cambrian - Nature
Early Cambrian Eoceras shaanxiense gen. et sp. nov. preserves septa and a segmented tube resembling a primordial siphuncle, extending cephalopod origins and revealing early…
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The first known cephalopod was only a millimetre long and lived about 520 million years ago
Small shelly fossils show that cephalopods with siphuncle structures lived in the early Cambrian period.