#family_Pteridaceae__Pteridaceae  one of a number of families into which the family Polypodiaceae has been subdivided in some classification systems; Pteridaceae is itself in turn sometimes further subdivided
  member:  #genus_Acrostichum  #genus_Actiniopteris  #genus_Adiantum  #genus_Anogramma  #genus_Cheilanthes  #genus_Coniogramme  #genus_Cryptogramma  #genus_Doryopteris  #genus_Jamesonia  #genus_Onychium  #genus_Pellaea  #genus_Pityrogramma  #genus_Pteris
  member of:  #order_Filicales
  supertype:  #fern_family  families of ferns and fern allies
     supertype:  #family  (biology) a taxonomic group containing one or more genera; "sharks belong to the fish family"
        supertype:  #taxonomic_group__taxonomicgroup__taxon  animal or plant group having natural relations
           supertype:  #biological_group  a group of plants or animals
              supertype:  #group__grouping  any number of entities (members) considered as a unit
                 supertype:  pm#collection  something gathering separated things (entities/situations)
                    supertype:  pm#divisible_entity__divisibleentity  many classifications under this category are application-dependant
                       supertype:  pm#entity  something that can be "involved" in a situation
                          supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type
                       supertype:  pm#divisible_thing__divisiblething
                          supertype:  pm#thing__something___T__t___3D_or_4D_thing_or_anything_else  any category (type or individual) is instance of this type; any type is also a subtype of this type

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