Fig. 1. Sample locations relative to a palaeogeographic reconstruction of the continental configuration during the Givetian stage (around 387–382 Ma) of the Devonian period (around 419–359 Ma).

The palaeomap and palaeopositions were generated using GPlates based on the PALEOMAP project of Scotese^86,87. The South Equatorial Current (SEC) is based on reconstructions and iterations thereof by Dopieralska¹⁵, Jakubowicz et al.¹⁶ and Oczlon¹⁷. The sampling locations are indicated in orange.