we now include new citations in relationship to different problems: Butlin et al. (2009), Cohan (2011), Cohan (2013), Cohan & Aracena (2012), Diekmann et al. (2004), Nosil (2012), Vos (2011), Wiedenbeck & Cohan (2011).
In Line 40 is cited only DeQueiroz (2007) to the problematic of species concept. It would be useful to evaluate and mention many other authors, who discussed this question more complexly. It concerns also several other problems, e.g., problematics of horizontal gene transfers (Line 43), “bounderies between taxon units” (Line 45), species concept (Line 48), etc. About species concept in cyanobacteria exist particularly many studies from last years.