"Roseburia difficilis" Liu et al. 2021 Dataset NCBI Taxonomy Classification kingdom Bacillati phylum Bacillota class Clostridia order Lachnospirales family Lachnospiraceae genus Roseburia species Roseburia difficilis Name Homonyms Roseburia difficilis "Roseburia difficilis" Liu et al. 2021 Roseburia difficilis Liu et al. 2022