RT Journal Article SR Electronic(1) A1 Katayama-Fujimura, Yoko A1 Kawashima, Ichiro A1 Tsuzaki, Naoko A1 Kuraishi, HiroshiYR 1984 T1 Physiological Characteristics of the Facultatively Chemolithotrophic Thiobacillus Species Thiobacillus delicatus nom. rev. , emend., Thiobacillus perometabolis, and Thiobacillus intermedius JF International Journal of Systematic and Evolutionary Microbiology, VO 34 IS 2 SP 139 OP 144 DO https://doi.org/10.1099/00207713-34-2-139 PB Microbiology Society, SN 1466-5034, AB The physiological characteristics of three facultatively chemolithotrophic Thiobacillus species with ubiquinone 8 (group II) (Thiobacillus delicatus THI 091T [T = type strain] Thiobacillus perometabolis THI 023 , and Thiobacillus intermedius THI 101T) were compared. These organisms differ from other facultatively chemolithotrophic Thiobacillus strains with ubiquinone 10 (group I) in requiring thiosulfate or elemental sulfur for optimum growth. T. delicatus THI 091T, T. perometabolis THI 023 , and T. intermedius THI 101T are regarded as three distinct species on the basis of their physiological characteristics. T. delicatus THI 091T differs from T. perometabolis THI 023T and T. intermedius THI 101T in its lack of motility, its ability to grow anaerobically with nitrate, and its intermediate formation of polythionate during thiosulfate oxidation. T. perometabolis THI 023T is distinguished from T. intermedius THI 101T by its ability to grow heterotrophically with a single carbon source. T. delicatus is not on the Approved Lists of Bacterial Names; therefore, this name is revived. In addition, the description of this organism is emended, considering its inability to grow heterotrophically with a single carbon source., UL https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/00207713-34-2-139