TAXONOMY: cellular organisms -> Bacteria -> Proteobacteria -> Gammaproteobacteria -> Thiotrichales
The 'Thiotrichales' are an order of Proteobacteria, including Thiomargarita namibiensis, the largest known bacterium.George M. Garrity: Bergey's Manual of Systematic Bacteriology. 2. Auflage. Springer, New York, 2005, Volume 2: The Proteobacteria, Part B: The Gammaproteobacteria They also include certain pathogens, such as Francisella Francisella tularensis which causes tularemia (rabbit fever).