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. 1990 [paraphyletic?]
             Genus †Primaevifilum Schopf 1983, incertae sedis
               1 †Primaevifilum septatumᵀ Schopf 1983
               2 †Primaevifilum delicatulum Schopf 1992
               3 †Primaevifilum amoenum Schopf 1992
               4 †Primaevifilum conicoterminatum Schopf 1992