Garrity, G.M., Bell, J.A. & Lilburn, T.G. 2004. Taxonomic Outline of the Prokaryotes. Bergey's Manual of Systematic Bacteriology, 2nd Edition. Release 5.0. Springer-Verlag, New York., May 2004: 1-399. [DOI: 10.1007/bergeysoutline200405] ≡