#fern_genus  genera of ferns and fern allies
  subtype:  #genus_Pecopteris  #genus_Hymenophyllum  #genus_Trichomanes  #genus_Osmunda  #genus_Leptopteris  #genus_Todea  #genus_Schizaea  #genus_Anemia  #genus_Lygodium  #genus_Mohria  #genus_Marsilea  #genus_Pilularia  #genus_Regnellidium  #genus_Salvinia  #genus_Azolla  #genus_Ophioglossum  #genus_Botrychium  #genus_Helminthostachys  #genus_Gleichenia  #genus_Dicranopteris  #genus_Diplopterygium  #genus_Sticherus  #genus_Ceratopteris  #genus_Polypodium  #genus_Aglaomorpha  #genus_Campyloneurum  #genus_Drymoglossum  #genus_Drynaria  #genus_Lecanopteris  #genus_Microgramma  #genus_Microsorium  #genus_Phlebodium  #genus_Platycerium  #genus_Pyrrosia  #genus_Solanopteris  #genus_Cyclophorus  #genus_Vittaria  #genus_Asplenium  #genus_Camptosorus  #genus_Ceterach  #genus_Pleurosorus  #genus_Schaffneria  #genus_Phyllitis  #genus_Blechnum  #genus_Doodia  #genus_Sadleria  #genus_Stenochlaena  #genus_Woodwardia  #genus_Cyathea  #genus_Davallia  #genus_Dennstaedtia  #genus_Pteridium  #genus_Dicksonia  #genus_Cibotium  #genus_Culcita  #genus_Thyrsopteris  #genus_Dryopteris  #genus_Athyrium  #genus_Cyrtomium  #genus_Cystopteris  #genus_Deparia  #genus_Diacalpa  #genus_Gymnocarpium  #genus_Lastreopsis  #genus_Matteuccia  #genus_Olfersia  #genus_Onoclea  #genus_Polybotrya  #genus_Polystichum  #genus_Rumohra  #genus_Tectaria  #genus_Woodsia  #genus_Bolbitis  #genus_Lomogramma  #genus_Lophosoria  #genus_Loxoma  #genus_Oleandra  #genus_Arthropteris  #genus_Nephrolepis  #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  #genus_Marattia  #genus_Angiopteris  #genus_Danaea  #genus_Psilotum  #genus_Psilophyton  #genus_Rhynia  #genus_Horneophyton  #genus_Equisetum  #genus_Lycopodium  #genus_Selaginella  #genus_Isoetes  #genus_Thelypteris  #genus_Amauropelta  #genus_Christella  #genus_Cyclosorus  #genus_Goniopteris  #genus_Macrothelypteris  #genus_Meniscium  #genus_Oreopteris  #genus_Parathelypteris  #genus_Phegopteris
  member of:  #division_Pteridophyta
  supertype:  #genus__genu  (biology) taxonomic group containing one or more species
     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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