Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [Vegetabilia mycetoidea]
           [Kingdom Nematomyci]
             [Circulus Byssi] see Suborder Byssacei
               [Linea Byssi liberi]
                 [Series Byssi disjuncti] see [unranked] Helmisporia