Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         "crystal-kingdom"
           [†pseudofossils]
             [Genus †Archaeotrichion Schopf (1968)] see Genus Archaeotrichion Schopf 1968 nom. inval.
               1 †Archaeotrichion contortum Schopf 1968