Spiroplasma poulsonii Williamson et al., 1999 Dataset Prokaryotic Nomenclature Up-to-Date (PNU) Rank SPECIES Published in Int. J. Syst. Bacteriol. 49::616 Classification genus Spiroplasma species Spiroplasma poulsonii Name Homonyms Spiroplasma poulsonii Williamson et al., 1999