The Gauss–Matuyama reversal is marked by a minor mass extinction of calcareous nannofossils Discoaster pentaradiatus and Discoaster surculus, among others.
The Gauss–Matuyama reversal is linked to the extinction of certain calcareous nannofossil species, including Discoaster pentaradiatus and Discoaster surculus, during a specific geological period.