Translingual

Agnatha, such as this lamprey, are distinguished by the lack of a jaw.

Proper noun

Agnatha

1. The jawless fishes, or agnathans
   1. A taxonomic superclass within the subphylum Vertebrata.
      • 1889, Edward Drinker Cope, "Synopsis of the Families of Vertebrata", The American Naturalist, volume 23, page 852:

        The known members of the class Agnatha are a very small representation of those that once existed; and they present a great variety of character, having little affinity with each other.

      • 2007, Chad Thomas et al., Freshwater Fishes of Texas, Texas A&M University Press, page 6:

        Current classification schemes have living fishes assigned to two superclasses (Agnatha, or jawless chordates, and Gnathostomata, or jawed chordates)[…].

   2. A taxonomic infraphylum within the subphylum Vertebrata.

Hypernyms

• (superclass): Animalia - kingdom; Eumetazoa - subkingdom; Bilateria, Nephrozoa - clades; Deuterostomia - superphylum; Chordata - phylum; Chordata Craniata - clade
• (subphylum): Eukaryota - superkingdom; Animalia - kingdom; Bilateria - subkingdom; Deuterostomia - infrakingdom; Chordata - phylum; Vertebrata - subphylum

Hyponyms

• (subphylum): Myxini, †Cephalaspidomorphi, †Pteraspidomorphi - classes

Hyponyms

• Cyclostomata
• Ostracodermi

Coordinate terms

• Gnathostomata

Descendants

• agnatha
• agnathan

English

Noun

agnatha ‎(plural agnathas)

1. An agnathan.