#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:  collection  something gathering separated things (entities/situations)
                 supertype:  divisible_entity__divisibleentity  many classifications under this category are application-dependant
                    supertype:  entity  something that can be "involved" in a situation
                       supertype:  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:  divisible_thing__divisiblething
                       supertype:  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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