#genus_Costia  a genus of flagellate protoctista
  supertype:  protoctist_genus  any genus of Protoctista
  member of:  order_Polymastigina
  member:  costia__Costia_necatrix  a flagellate that is the cause of the frequently fatal fish disease costiasis

No statement uses or specializes genus_Costia; click here to add one.