Diversity of uncultured Epsilonproteobacteria from terrestrial sulfidic caves and springs

This study expands the phylogenetic diversity of Epsilonproteobacteria using the 16S rRNA gene framework. Of the 73 lineages defined by sequence similarities at or greater than 99%, most were found at only one site. In contrast, eight lineages were retrieved from sites spanning geographic distances from 1,000 to > 10,000 km.