TOMMOTION FAUNA

Tommotion Fauna existed at the base of the Cambrian and were marked by small shelly fossils, on the order of millimeters in scale. This fauna, which existed 570-560 Ma were fundamentally important in that they represented metazoans containing the first known hard parts and were the predecessors to the phyla of the Cambrian Explosion. Prior to the Tommotian fauna, the Ediacaran metazoans consisted of soft parts in forms that varied from pancakes, fronds and stringers.

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