Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum Terrabacteria Battistuzzi et al. 2004
               Phylum Firmicutes corrig. Gibbons and Murray 1978 (Approved Lists 1980)
                 Class Negativicutes Marchandin et al. 2010 [monotypic]
                   Order Selenomonadales Marchandin et al. 2010
                     Family Sporomusaceae Campbell et al. 2015
                       Genus Pelosinus Shelobolina et al. 2007
                         1 Pelosinus fermentansᵀ Shelobolina et al. 2007
                         2 Pelosinus propionicus (Boga et al. 2007) Moe et al. 2012
                         3 Pelosinus defluvii Moe et al. 2012