• A similar scenario has been observed for the blind cavefish genus Lucifuga, in which several evolutionary lineages are confined to narrow allopatric geographic areas (e.g. L. simile, L. dentata holguinensis) while others (i.e. Lucifuga dentata) show progressively long range dispersal events that have resulted in geographical overlap with other highly divergent species (García-Machado et al., 2011).