Abstract
The 16S rDNA sequences of [Aquaspirillum] dispar LMG 4329(T) and Microvirgula aerodenitrificans SGLY2(T) (=LMG 18919(T)) were found to be very similar (>99 %). DNA-DNA hybridizations between the two strains revealed a high level of DNA-DNA binding (84 %), showing that they represent a single species. M. aerodenitrificans and [A.] dispar were also phenotypically very similar. It is concluded that [A.] dispar and M. aerodenitrificans are subjective synonyms. As [A.] dispar was wrongly assigned to the genus Aquaspirillum, we propose that strains of [A.] dispar must be reclassified in the genus MICROVIRGULA: The name Microvirgula aerodenitrificans must be retained for the unified taxon since it is the type of the genus MICROVIRGULA:
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