Figure 1 : Phylogenetic context of the Lake Victoria Region cichlid radiation.

From: Ancient hybridization fuels rapid cichlid fish adaptive radiations

Figure 1

(a) Maximum likelihood phylogeny built from concatenated RADtag sequences of Lake Victoria Region Superflock (LVRS) cichlids and relatives including all known lineages of haplochromine cichlids (n=156). Radiations are indicated as grey triangles in the phylogenetic tree and multiple samples of a lineage are visually collapsed to a single terminal branch (full tree in Supplementary Fig. 1). Members of the LVRS (including Haplochromis sp. ‘Nyangara’ from the Rusizi River and Haplochromis spp. Egypt, see Supplementary Discussion) are indicated with orange stars both in the tree and in the sampling map (b) and are labelled by lake (L) or river (R) they were sampled in. ‘Congolese lineage’ LVRS relatives are highlighted with red triangles, members of the ‘Upper Nile lineage’ with blue triangles, those from Eastern rivers with dark blue squares, and all other more distantly related lineages with black circles. (b) Sampling map. River drainage systems that we sampled are shown as coloured polygons. The radiation ancestor’s closest living relatives are shown in images: ‘Haplochromisgracilior/Thoracochromis pharyngalis from the Upper Nile lineage and Astatotilapia sp. ‘Yaekama’/A. stappersi from the Congolese lineage. The Lake Victoria cichlids shown in the grey triangle on the right represent some of the many and varied species that arose from the hybrid swarm (Photo credits: Ole Seehausen, Salome Mwaiko, Frans Witte, ‘Teleos’, Uli Schliewen, Adrian Indermaur, Oliver Selz; map adapted from http://www.worldwildlife.org/hydrosheds80).