superclass Agnatha

Thesaurus

Noun

1.superclass Agnatha - superclass of eel-shaped chordates lacking jaws and pelvic fins: lampreys; hagfishes; some extinct formsAgnathaCraniata, subphylum Craniata, subphylum Vertebrata, Vertebrata - fishes; amphibians; reptiles; birds; mammalsagnathan, jawless fish, jawless vertebrate - eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct formsorder Ostracodermi, Ostracodermi - extinct group of armored jawless vertebrates; taxonomy is not clearAnaspida, order Anaspida - extinct order of jawless vertebratesConodonta, Conodontophorida, order Conodonta, order Conodontophorida - extinct order of primitive vertebrates; the precise taxonomy is not clear; in some classifications considered a separate phylumCyclostomata, order Cyclostomata - primitive jawless aquatic vertebrate: lampreys; hagfishesclass - (biology) a taxonomic group containing one or more orders