| description of seven candidate species affiliated with the phylum actinobacteria, representing planktonic freshwater bacteria. | actinobacteria comprise a substantial fraction of the bacterioplankton in freshwater lakes and streams. numerous cultivation-independent investigations have retrieved actinobacterial 16s rrna gene sequences from such habitats. the taxa detected in freshwater habitats are usually absent from terrestrial and marine systems. so far, none of the indigenous freshwater lineages is represented by a taxon with a validly published name. the seven organisms for which candidatus status is described here we ... | 2009 | 19126733 |