%0 Journal Article %A Iino, Takao %A Kawai, Shigeru %A Yuki, Masahiro %A Dekio, Itaru %A Ohkuma, Moriya %A Haruta, Shin %T Thermaurantimonas aggregans gen. nov., sp. nov., a moderately thermophilic heterotrophic aggregating bacterium isolated from microbial mats at a terrestrial hot spring %D 2020 %J International Journal of Systematic and Evolutionary Microbiology, %V 70 %N 2 %P 1117-1121 %@ 1466-5034 %R https://doi.org/10.1099/ijsem.0.003888 %K hot spring %K dense cell aggregates %K Thermaurantimonas aggregans %K moderatory thermophilic %K heterotroph %K Thermaurantimonas %I Microbiology Society, %X A moderately thermophilic and heterotrophic bacterial strain, LAT, was isolated from microbial mats sampled at a hot spring in Nakabusa, Nagano, Japan. The cells of strain LAT were aerobic, Gram-stain-negative, non-sporulating, non-motile and rod-shaped (2.0–4.1 µm long). The formation of dense cell aggregates in liquid medium was a unique characteristic of the strain. Strain LAT grew optimally at 50°C and at pH 7.5. Phylogenetic analysis based on the 16S rRNA gene sequence revealed that the nearest neighbour of strain LAT was Schleiferia thermophila JCM 30197T with 94.1 % sequence similarity. The draft genome sequence of strain LAT (2 671 880 bp) showed 18.0 % digital DNA-DNA hybridization, 70.9 % average nucleotide identity and 72.1 % average amino acid identity (AAI) values in comparison with the genome sequence of S. thermophila JCM 30197T (2 606 763 bp); the 16S rRNA gene sequence similarity and AAI values are lower than the cutoffs used for assignment to a separate genus. On the basis of phenotypic features, major cellular fatty acid composition, genome sequencing and phylogenetic position, a novel genus and species are proposed for strain LAT, to be named Thermaurantimonas aggregans (= JCM 31826T=DSM 106522T). %U https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijsem.0.003888