Assertion: dinocephalian extinction | /r/AtLocation | late capitanian
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Source sentences:
text: The recognition of a younger dinocephalian fauna in Russia (the Sundyr Tetrapod Assemblage) and the retrieval of biostratigraphically well-constrained radiometric ages via uranium–lead dating of a tuff from the Tapinocephalus Assemblage Zone of the Karoo Basin demonstrated that the dinocephalian extinction did occur in the late Capitanian, around 260 million years ago.