[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 "Bacilli" Garrity et al. 2001 nom. ined. see Class Bacilli Ludwig et al. 2010
         Order Bacillales Prévot 1953 (Approved Lists 1980)
           Family "Paenibacillaceae" De Vos et al., 2010 see Family Paenibacillaceae De Vos et al. 2010
             Genus Paenibacillus Ash et al. 1994
               Paenibacillus apiarius (ex Katznelson 1955) Nakamura 1996