Sphaerotilus hippei Gridneva et al. 2011 Gridneva E. Chernousova E. Dubinina G. Akimov V. Kuever J. Detkova E. Grabovich M. Taxonomic investigation of representatives of the genus Sphaerotilus: descriptions of Sphaerotilus montanus sp. nov., Sphaerotilus hippei sp. nov., Sphaerotilus natans subsp. natans subsp. nov. and Sphaerotilus natans subsp. sulfidivorans subsp. nov., and an emended description of the genus Sphaerotilus 2011 61 4 916 925 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.023887-0 20495027