xanthobacter tagetidis xanthobacter tagetidis xanthobacter tagetidis is a bacterium from the family of xanthobacteraceae which has been isolated from soil from root balls around the plant tagetes patula in the united kingdom. xanthobacter tagetidis has the ability to grow on substituted thiophenes. xanthobacter tagetidis scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: xanthobacteraceae genus: xanthobacter species: x. tagetidis binomial name xanthobacter tagetidispadden et al. 1997 type strain atcc 700314, dsm 11105, ncimb 13547, tag-t2c, tagt2c