"Christensenella massiliensis" Ndongo et al. 2016 Dataset NCBI Taxonomy Classification phylum Bacillota class Clostridia order Christensenellales family Christensenellaceae genus Christensenella species Christensenella massiliensis Name Homonyms Christensenella massiliensis "Christensenella massiliensis" Ndongo et al. 2016