herbaspirillum autotrophicum herbaspirillum autotrophicum herbaspirillum autotrophicum is a bacterium which cannot fix nitrogen under laboratory conditions, like herbaspirillum seropedicae, because it does not have the nif gene. herbaspirillum autotrophicum scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: burkholderiales family: oxalobacteraceae genus: herbaspirillum species: h. autotrophicum binomial name herbaspirillum autotrophicum(aragno and schlegel 1978) ding & yokata (2004) synonyms aquaspirillum autotrophicum