Figure 4
From: Most species are not limited by an Amazonian river postulated to be a border between endemism areas
Location of study area (maps generated using QGIS v2.18, http://www.qgis.org). (a) Section of the river investigated (red square); and (b) Location of sample grids (black dots) along the Madeira River (see sample-grid details in Fig. S8).
