Distribution map of the Syagrus glaucescens species complex, maps of Serra Negra Formation (SN), and 3D map of Serra do Ambrósio mountain (SA). A. Location of SN, Diamantina Plateau, Syagrus harenae, Syagrus aristeae, Syagrus duartei, Syagrus evansiana, and Syagrus glaucescens. B. Relief and outline of the SN and localisation of the SA. C. Municipalities embedded in the SN. D. Relief of the SA and collection points of Splett 875 and the holotype of S. harenae. E. An endocarp (en) of S. harenae on the sandy soil of the carrasco.