Nama assemblage
| Nama Assemblage | ||||||||||||||||||||||||||
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Specimens of Cloudina carinata from the Tamengo Formation of Brazil. | ||||||||||||||||||||||||||
| Chronology | ||||||||||||||||||||||||||
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The Nama assemblage was the last of the Ediacaran biotic assemblages. Following the Avalon and White Sea assemblages, it spanned from c. 550 Ma to c. 539 Ma, coinciding with the Terminal Ediacaran biozone. The assemblage was characterized by a faunal turnover, with the decline of the preexisting White Sea biota. The drop of diversity has been compared to the mass extinctions of the Phanerozoic. A second drop of diversity occurred at the Ediacaran–Cambrian boundary, concluding the Nama assemblages with the end-Ediacaran extinction.