gen. nov., sp. nov., a novel thermophilic phototrophic purple sulphur bacterium of the isolated from Nakabusa hot springs, Japan.

A novel thermophilic phototrophic purple sulphur bacterium was isolated from microbial mats (56 °C) at Nakabusa hot springs, Nagano prefecture, Japan. Cells were motile, rod-shaped, stain Gram-negative and stored sulphur globules intracellularly. Bacteriochlorophyll and carotenoids of the normal spirilloxanthin series were the major pigments.