#echinoderm_genus  a genus of echinoderms
  subtype:  #genus_Euryale  #genus_Astrophyton  #genus_Gorgonocephalus  #genus_Ptilocrinus  #genus_Antedon  #genus_Holothuria
  member of:  #kingdom_Animalia
  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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