[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990 stat. inval. see Domain Bacteria Woese et al. 2024
     Phylum "Proteobacteria" Garrity et al. 2005 stat. inval. see Phylum Pseudomonadota Garrity et al. 2021
       Class Betaproteobacteria Garrity et al. 2006
         Order Neisseriales Tønjum 2006
           Family Neisseriaceae Prévot 1933 (Approved Lists 1980)
             Genus Aquaspirillum Hylemon et al. 1973 (Approved Lists 1980)
               [Aquaspirillum peregrinum] (Pretorius 1963) Hylemon et al. 1973 (Approved Lists 1980) see Insolitispirillum peregrinum (Pretorius 1963) Yoon et al. 2007
                 Aquaspirillum peregrinum subsp. integrum (Terasaki 1973) Terasaki 1979 (Approved Lists 1980) see Insolitispirillum peregrinum subsp. integrum (Terasaki 1973) Yoon et al. 2007