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 Bacilli Ludwig et al. 2010
                   Order Bacillalesᵀ Prévot 1953 (Approved Lists 1980)
                     Genus Exiguobacterium Collins et al. 1984, incertae sedis
                       01 Exiguobacterium acetylicum (Levine and Soppeland 1926) Farrow et al. 1994
                       02 Exiguobacterium aestuarii Kim et al. 2005
                       03 Exiguobacterium alkaliphilum Kulshreshtha et al. 2013
                       04 Exiguobacterium antarcticum Frühling et al. 2002
                       05 Exiguobacterium aquaticum Raichand et al. 2012
                       06 Exiguobacterium artemiae López-Cortés et al. 2006
                       07 Exiguobacterium aurantiacumᵀ Collins et al. 1984
                       08 Exiguobacterium indicum Chaturvedi and Shivaji 2006
                       09 Exiguobacterium marinum Kim et al. 2005
                       10 Exiguobacterium mexicanum López-Cortés et al. 2006
                       11 Exiguobacterium oxidotolerans Yumoto et al. 2004
                       12 Exiguobacterium profundum Crapart et al. 2007
                       13 Exiguobacterium sibiricum Rodrigues et al. 2006
                       14 Exiguobacterium soli Chaturvedi et al. 2008
                       15 Exiguobacterium undae Frühling et al. 2002