#order_Cyclostomata__Cyclostomata  primitive jawless aquatic vertebrate: lampreys; hagfishes
  supertype:  #animal_order  the order of animals
  member of:  #superclass_Agnatha
  member:  #cyclostome  primitive aquatic vertebrate
  member:  #suborder_Petromyzoniformes__Petromyzoniformes__Hyperoartia__suborder_Hyperoartia  lampreys as distinguished from hagfishes
  member:  #family_Petromyzontidae__Petromyzontidae  lampreys
     member:  #lamprey_eel__lampreyeel__lamprey__lamper_eel  primitive eellike freshwater or anadromous cyclostome having round sucking mouth with a rasping tongue
     member:  #genus_Petromyzon__Petromyzon  typical lampreys
        member:  #sea_lamprey__sealamprey__Petromyzon_marinus  large anadromous lamprey sometimes used as food; destructive of native fish fauna in the Great Lakes
  member:  #suborder_Myxiniformes__Myxiniformes__Hyperotreta__suborder_Hyperotreta__Myxinoidei__Myxinoidea__suborder_Myxinoidei  hagfishes as distinguished from lampreys
  member:  #family_Myxinidae__Myxinidae  slime-producing marine animals: hagfishes
     member:  #hagfish__slime_eels  eellike cyclostome having a tongue with horny teeth in a round mouth surrounded by eight tentacles; feeds on dead or trapped fishes by boring into their bodies
     member:  #genus_Myxine__Myxine  type genus of the Myxinidae (typical hagfishes)
        member:  #Myxine_glutinosa  typical hagfish
     member:  #genus_Eptatretus  a genus of fossil fish of the family Myxinidae
        member:  #eptatretus  a fossil hagfish of the genus Eptatretus
     member:  #genus_Myxinikela__Myxinikela  fossil hagfishes
        member:  #Myxinikela_siroka  fossil hagfish of the Pennsylvanian period (c. 300 million years ago) that resembled modern hagfishes

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