Phenotypic and phylogenetic studies were performed with two strains (OCh 239and OCh 210, T = type strain) of aerobic bacteriochlorophyll-containing bacteria isolated from the charophytes and the epiphytes on the stromatoltes respectively, of a saline lake located on the west coast of Australia. Both strains were chemoheterotrophic, Gram-negative and motile rods with subpolar flagella. Catalase and oxidase were produced. ONPG reaction was positive. Cells utilized -glucose, acetate, butyrate, citrate, -lactate, -malat pyruvate, succinate, -aspartate and -glutamate. Acids were produced from -fructose and -glucose. Bacteriochlorophyll a was synthesized under aerobic conditions. Strain OCh 239had nitrate reductase and phosphatase. Acids were produced from -arabinose, -galactose, lactose, maltose, -ribos and sucrose. The strain could grow in 0-20.0% (w/v) NaCl. Strain OCh 210had urease. Hydrolysis of gelatin was positive. Acids were produced from -xylo. The strain could grow in 0.5--20.0% (w/v) NaCI. The results of 16S rRNA sequence comparisons revealed that strains OCh 239and OCh 210formed a new cluster within the α-3 group of the α subclass of the class . The similarity value of the 16S rRNA sequences between strains OCh 239and OCh 210was 95.8%. Therefore, it was concluded that these two strains should be placed in a new genus, gen. nov., as the new species sp. nov. and sp. nov. The type species of the genus is . The type strains of and are OCh 239(= JCM 10272) and OCh 210(= JCM 10271), respectively.


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