#order_Ostracodermi__Ostracodermi  extinct group of armored jawless vertebrates; taxonomy is not clear
  supertype:  animal_order  the order of animals
  member of:  superclass_Agnatha
  member:  ostracoderm  extinct fishlike jawless vertebrate having a heavily armored body; of the Paleozoic
  member:  suborder_Heterostraci__Heterostraci  extinct group of armored jawless fishes or fishlike vertebrate; taxonomy is not clear
     member:  heterostracan  extinct jawless fish with the anterior part of the body covered with bony plates; of the Silurian and Devonian
  member:  suborder_Osteostraci__Osteostraci__Cephalaspida__suborder_Cephalaspida  extinct group of armored fishlike vertebrates; taxonomy is not clear
     member:  osteostracan__cephalaspid  extinct jawless fish of the Devonian with armored head

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