Alignment of the “ Spiribacter ” genomes and the closest available genome of Alkalilimnicola ehrlichii MLHE-1. Each genome is represented linearized starting from the OriC. Some genomic regions relevant to lifestyle present in A. ehrlichii MLHE-1 and completely missing in “Spiribacter” are highlighted as blue rectangles. Genomic islands of very different genetic make up between both “Spiribacter” genomes are indicated below, in blue when present in both (but containing different genes) and green when present in one of the strains only. Locations of rRNA genes of each genome are indicated in yellow.