aquaspirillum dispar aquaspirillum dispar aquaspirillum dispar is a species of aquaspirillum that is also known as microvirgula aerodenitrificans patureau. aquaspirillum dispar scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: neisseriales family: neisseriaceae genus: aquaspirillum species: a. dispar binomial name aquaspirillum disparhylemon et al. 1973 microvirgula dispute several studies show that aquaspirillum dispar and microvirgula aerodenitrificans have a rdna similarity of greater that 99%. it has been proposed that the name aquaspirillum dispar cease to be relevant because microvirgula aerodenitrificans is the type species of microvirgula. however, no official action has been made, so aquaspirillum dispar is still relevant.