Numerical Taxonomy of Violet-Pigmented, Gram-Negative Bacteria and Description of Iodobacter fluviatile gen. nov., comb. nov. LOGAN, NIALL A.,, 39, 450-456 (1989), doi = https://doi.org/10.1099/00207713-39-4-450, publicationName = Microbiology Society, issn = 1466-5026, abstract= A total of 113 violet chromogens, 45 of which produced spreading colonies characteristic of Chromobacterium fluviatile, were isolated from fresh water. These isolates and 27 other chromobacteria, 9 duplicates, and 11 reference strains were subjected to 95 characterization tests, and similarities were computed by using the coefficient of Gower. Cluster and principal coordinate analyses showed Janthinobacterium lividum to be a heterogeneous species but Chromobacterium violaceum and C. fluviatile to be well-separated and homogeneous phenons. The new, monospecific genus Iodobacter is proposed to accommodate C. fluviatile, which was originally placed in the genus Chromobacterium, despite its low guanine-plus-cytosine content (50 to 52 mol %, but 65 to 68 mol% for C. violaceum), pending the study of further isolates. The type strain of Iodobacter fluviatile comb. nov. is NCTC 11159., language=, type=