Thermus ruber sp. nov., nom. rev.

The name Thermus ruber Loginova, Egorova, Golovacheva, and Seregina 1975 is revived for the same organism on which the original description was based. The temperature range for growth on a potatopeptone-yeast extract medium is 37 to 70°C, and the optimum temperature for growth is 60°C. T. ruber is characterized by the production of an intracellular bright red (or occasionally bright orange) carotenoid pigment with an absorption spectrum similar to that of retro-dehydro-γ-carotene (or occasionally neuro-sporaxanthine). The type strain is strain 1258 in the All-Union Collection of Microorganisms, Moscow, USSR.