Genus II Arhodomonas Adkins Madigan Mandelco Woese and Tanner 1993 518VP

Ralph S. Tanner and Johannes F. Imhoff'nas. Gr. pref. a not; Gr. n. rhodon the rose, also the color or odor of the rose; Gr. n. monas lonely, alone; M.L. n. Arhodomonas the monas that is not rose colored.

Cells are rods that occur singly or in pairs, are motile by means of flagella, and multiply by binary fission. Gram negative. Members of the Ectothiorhodospiraceae of the Gammaproteobacteria. Gas vesicles and endospores are not formed.

Growth occurs under chemoorganotrophic conditions with oxygen or nitrate as the electron acceptor. Phototrophic growth is not possible and photosynthetic pigments are not produced. Cat-alase and oxidase positive.

Mesophilic and halophilic bacteria that require sodium for growth.

Type species: Arhodomonas aquaeolei Adkins, Madigan, Man-delco, Woese and Tanner 1993, 518.

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