"Sphingomonas xanthus" Kim et al. 2021 Dataset NCBI Taxonomy Classification phylum Pseudomonadota class Alphaproteobacteria order Sphingomonadales family Sphingomonadaceae genus Sphingomonas species Sphingomonas xanthus Name Homonyms Sphingomonas xanthus "Sphingomonas xanthus" Kim et al. 2021