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Author Gaël Clément is associated with the wrong affiliation. The following is the correct affiliation:
1 UMR 7207 CNRS-MNHN, Centre de Recherches sur la Paléobiodiversité et les Paléoenvironnements (CR2P), Département Histoire de la Terre, Muséum national d'Histoire naturelle, Paris, France
Competing Interests: No competing interests declared.
