Natura - nature actualia - actual entities Mundus Plinius - physical world naturalia - natural bodies Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020] Domain Bacteria Woese et al. 2024 Kingdom Pseudomonadati (Gibbons and Murray 1978) Oren and Göker 2024 Phylum Pseudomonadotaᵀ Garrity et al. 2021 Class Alphaproteobacteria Garrity et al. 2006 Order Rhodospirillales Pfennig and Trüper 1971 (Approved Lists 1980) Family Rhodospirillaceae Pfennig and Trüper 1971 (Approved Lists 1980) 01 Genus Aerophototrophica Tang et al. 2021 02 Genus Algihabitans Wang et al. 2019 03 Genus Aliidongia Chen et al. 2017 04 Genus Caenispirillum Yoon et al. 2007 05 Genus Cauispirillum Fu et al. 2026 06 Genus Dongia Liu et al. 2010 07 Genus Ferruginivarius Wang et al. 2019 08 Genus Haematospirillum Humrighouse et al. 2016 09 Genus Hypericibacter Noviana et al. 2020 10 Genus Indioceanicola Chen et al. 2018 11 Genus Insolitispirillum Yoon et al. 2007 12 Genus Magnetospirillum Schleifer et al. 1992 13 Genus Marispirillum Lai et al. 2009 [monotypic] 14 Genus Novispirillum Yoon et al. 2007 15 Genus Oleiliquidispirillum Li et al. 2020 16 Genus Oleisolibacter Ruan et al. 2019 17 Genus Pararhodospirillum Lakshmi et al. 2014 18 Genus Phaeovibrio Lakshmi et al. 2011 [monotypic] 19 Genus Rhodospira Pfennig et al. 1998 [monotypic] 20 Genus Rhodospirillumᵀ Molisch 1907 (Approved Lists 1980) [monotypic] 21 Genus Roseospira Imhoff et al. 1998 22 Genus Tagaea Jean et al. 2016 23 Genus Telmatospirillum Sizova et al. 2007 [monotypic] 24 Genus Vineibacter Lin et al. 2021 25 Genus Virgifigura Li et al. 2025 26 Genus "Roseospirillum" Glaeser and Overmann 2001 nom. inval. [monotypic]