[organisms] see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Bacteria Woese et al. 1990
     Phylum Firmicutes corrig. Gibbons and Murray 1978 (Approved Lists 1980)
       Class "Clostridia" Garrity et al. 2001 nom. ined. see Class Clostridia Rainey 2010
         Order Clostridiales Prévot 1953 (Approved Lists 1980)
           Family Clostridiaceae Pribram 1933 (Approved Lists 1980)
             Genus Clostridium Prazmowski 1880 (Approved Lists 1980)
               [Clostridium stercorarium] Madden 1983
                 1 Clostridium stercorarium subsp. leptospartum (Toda et al. 1989) Fardeau et al. 2001
                 2 Clostridium stercorarium subsp. stercorariumᵀ (Madden 1983) Fardeau et al. 2001
                 3 Clostridium stercorarium subsp. thermolacticum (Le Ruyet et al. 1988) Fardeau et al. 2001