“…During the Late Pleistocene glaciations (≈106 Ka), lake levels dropped by ≈435 m, and while the size of LT was considerably reduced, it remained a large and mostly connected water body (McGlue et al, 2008). These lake-level fluctuations have been shown to influence distributions and diversification in multiple cichlid species (e.g., Rüber, Verheyen, & Meyer, 1999;Sefc, Mattersdorfer, Hermann, & Koblmüller, 2017;Sturmbauer, Börger, van Steenberge, & Koblmüller, 2017;Verheyen, Rüber, Snoeks, & Meyer, 1996) primarily through altered habitat barriers and repeated periods of isolation followed by secondary contact (e.g., Egger, Koblmüller, Sturmbauer, & Sefc, 2007;Nevado, Mautner, Sturmbauer, & Verheyen, 2013). Lake-level rises also correlate with population expansions allowing the colonization of new habitats (Koblmüller et al, 2011;Winkelmann, Rüber, & Genner, 2017).…”