roseibium alexandrii roseibium alexandrii roseibium alexandrii is a bacterium from the genus of roseibium, which has been isolated from the dinoflagellate alexandrium lusitanicum in germany. roseibium alexandrii scientific classification domain: bacteria phylum: pseudomonadota class: alphaproteobacteria order: hyphomicrobiales family: stappiaceae genus: roseibium species: r. alexandrii binomial name roseibium alexandrii(biebl et al. 2007) hördt et al. 2020 type strain dsm 17067, ncimb 14079, strain dfl-11 synonyms labrenzia alexandrii biebl et al. 2007