Thiothrix unzii Howarth et al. 1999 Howarth R. Unz R.F. Seviour E.M. Seviour R.J. Blackall L.L. Pickup R.W. Jones J.G. Yaguchi J. Head I.M. Phylogenetic relationships of filamentous sulfur bacteria (Thiothrix spp. and Eikelboom type 021N bacteria) isolated from wastewater-treatment plants and description of Thiothrix eikelboomii sp. nov., Thiothrix unzii sp. nov., Thiothrix fructosivorans sp. nov. and Thiothrix defluvii sp. nov. 1999 49 4 1817 1827 International Journal of Systematic Bacteriology Int J Syst Bacteriol 0020-7713 10.1099/00207713-49-4-1817 10555365