"Christensenella tenuis" Liu et al. 2021 Dataset NCBI Taxonomy Classification kingdom Bacillati phylum Bacillota class Clostridia order Christensenellales family Christensenellaceae genus Christensenella species Christensenella tenuis Name Homonyms Christensenella tenuis "Christensenella tenuis" Liu et al. 2021 Christensenella tenuis Liu et al. 2022