#chordate_genus  any genus in the phylum Chordata
  supertype:  #genus__genu  (biology) taxonomic group containing one or more species
  member of:  #phylum_Chordata
  subtype:  #genus_Amphioxus  type genus of the Amphioxidae
  subtype:  #genus_Salpa  type (perhaps sole) genus of the Salpidae
  subtype:  #genus_Doliolum  type genus of the Doliolidae
  subtype:  #genus_Appendicularia  a genus of chordates in the class Larvacea

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