Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         "crystal-kingdom"
           [†pseudofossils]
             [Genus †Amaralia Kegel, 1967, nom. illeg.] see Genus Ridiculella Koerber & Costa da Silva, 2014, nom. inval.
             [Genus †Archaeoscillatoriopsis Schopf (1993)] see Genus Archaeoscillatoriopsis Schopf 1993
             [Genus †Archaeotrichion Schopf (1968)] see Genus Archaeotrichion Schopf 1968 nom. inval.
             [Genus †Eoleptonema Schopf (1983)] see Genus Eoleptonema Schopf 1983 nom. inval.
             [Genus †Primaevifilum Schopf (1983), incertae sedis] see Genus Primaevifilum Schopf 1983 nom. inval.
             [Genus †"Ridiculella" Koerber & Costa da Silva, 2014, nom. inval.]
             01 [Genus †Aenigmichnus Hitchcock, 1865]
             01.0 [Genus †"Aenigmichus" Hitchcock, 1865, orth. inval.] see Genus Aenigmichnus Hitchcock, 1865
             02 [Genus †Aequorfossa Neviani, 1925]
             03 [Genus †Ambarchaeooides Qian, Chen & Chen, 1979]
             04 [Genus †Ammosphaeroides Cushman, 1910]
             05 [Genus †Antholithina Choubert, Termier & Termier (1951)]
             06 [Genus †Archaeodon von Huene, 1925]
             07 [Genus †Archaeophyton N.L. Britton (1888)]