Bacillus stearothermophilus Donk, 1920 Dataset Prokaryotic Nomenclature Up-to-Date (PNU) Rank SPECIES Published in Int. J. Syst. Bacteriol. 30::257 Classification genus Geobacillus species Geobacillus stearothermophilus Name Homonyms Bacillus stearothermophilus Donk, 1920