Agnatha

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Noun1.Agnatha - superclass of eel-shaped chordates lacking jaws and pelvic fins: lampreysAgnatha - superclass of eel-shaped chordates lacking jaws and pelvic fins: lampreys; hagfishes; some extinct forms
Craniata, subphylum Craniata, subphylum Vertebrata, Vertebrata - fishes; amphibians; reptiles; birds; mammals
agnathan, jawless fish, jawless vertebrate - eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms
order Ostracodermi, Ostracodermi - extinct group of armored jawless vertebrates; taxonomy is not clear
Anaspida, order Anaspida - extinct order of jawless vertebrates
Conodonta, Conodontophorida, order Conodonta, order Conodontophorida - extinct order of primitive vertebrates; the precise taxonomy is not clear; in some classifications considered a separate phylum
Cyclostomata, order Cyclostomata - primitive jawless aquatic vertebrate: lampreys; hagfishes
class - (biology) a taxonomic group containing one or more orders
References in periodicals archive ?
The assemblages of the Middle Devonian psammosteid agnathans from the eastern part of the Main Devonian Field.
Many types of SS have been cloned with the same amino acid (aa) sequence in vertebrates subsequently, from agnathans to mammals (Conlon et al.
Nebulin is a thin filament protein of the cardiac muscle of the agnathans.
70-92) summarizes the distribution of aquaporins in the major osmoregulatory organs of teleosts, elasmobranchs, and agnathans, such as the gills, intestine, and kidney.
Catalogue of Agnathans and Fishes of Fresh and Brackish Waters of Russia with Comments on Nomenclature and Taxonomy.
Between jawless vertebrates -- called agnathans -- and vertebrates with jaws-called gnathosomes-only three genes of the 12 genes the team looked at appeared to be used differently, Medeiros said.
Because the evidence of these fish, called agnathans, is scant and fragmentary, scientists know little about the agnathans' appearance or about their evolutionary history.
The agnathans, chondrichthyans, and functionality of fish aquaporins generally have received little attention.
Kompleksy srednedevonskikh psammosteidnykh beschelyustnykh vostochnoj chasti Glavnogo devonskogo polya [The assemblages of Middle Devonian psammosteid agnathans from the eastern part of the Main Devonian Field].