#division_Pteridophyta__Pteridophyta  containing all the vascular plants that do not bear seeds: ferns, horsetails, club mosses, and whisk ferns; in some classifications considered a subdivision of Tracheophyta
  member:  genus_Pecopteris  pteridophyte  fern_family  fern_genus  class_Filicopsida  class_Psilopsida  order_Psilophytales  class_Sphenopsida  class_Lycopsida
  member of:  kingdom_Plantae
  supertype:  division.phylum  (botany) taxonomic unit of plants corresponding to a phylum
     supertype:  phylum  (biology) the major taxonomic group of animals and plants; contains classes
        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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