Rhizobium viscosum (Gasdorf et al. 1965) Flores-Félix et al. 2017 Arthrobacter viscosus Gasdorf et al. 1965 (Approved Lists 1980) Heyrman J. Verbeeren J. Schumann P. Swings J. De Vos P. Six novel Arthrobacter species isolated from deteriorated mural paintings. 2005 55 4 1457 1464 International Journal of Systematic and Evolutionary Microbiology Int J Syst Evol Microbiol 1466-5026 1466-5034 10.1099/ijs.0.63358-0 16014466 A. viscosus, for which no 16S rRNA gene sequence was previously available, is most closely related to members of the genus Rhizobium, e.g. Rhizobium gallicum (98·1 % 16S rRNA gene sequence similarity), Rhizobium mongolense (98·0 %) and Rhizobium leguminosarum (97·6 %). This is not unexpected, as Keddie et al. (1986) stated that the chemotaxonomic data for this species were in accordance with the view that it is indeed a Gram-negative rod. From rid3876