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 Bacillatiᵀ (Gibbons and Murray 1978) Oren and Göker 2024
               Phylum Bacillotaᵀ Gibbons and Murray 2021
                 Class Bacilliᵀ Ludwig et al. 2010
                   Order Caryophanalesᵀ Peshkoff 1939 (Approved Lists 1980)
                     Family Bacillaceae Fischer 1895 (Approved Lists 1980)
                       Genus Exiguobacterium Collins et al. 1984
                         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