different between cyclostome vs agnathan

English

Etymology

French cyclostome, from Ancient Greek ?????? (kúklos, “circle”) + ????? (stóma, “mouth”).

Noun

cyclostome (plural cyclostomes)

1. Any of various primitive jawless fish of the class Cyclostomata, such as the lamprey or hagfish.
   • 1811, André Marie Constant Duméril, "On the Sense of Smell in Fishes", Journal of Natural Philosophy, Chemistry, and the Arts, volume 29, page 344:

     Except the cyclostomes, as the lampreys and sphagobranchiæ, which are not real fishes, as I shall show elsewhere.

   • 1835, William Kirby, On the Power Wisdom and Goodness of God, volume 2, William Pickering, page 390:

     The Cyclostomes, or suckers, with regard to their skeletons, are the most imperfect of all the Vertebrates,

Translations

Anagrams

• motocycles

French

Etymology

Ancient Greek ?????? (kúklos, “circle”) + ????? (stóma, “mouth”).

Noun

cyclostome m (plural cyclostomes)

1. cyclostome
   • 1806, André Marie Constant Duméril, Zoologie analytique, page 100:

     Le famille des cyclostomes comprend des poissons qui diffèrent de tous les animaux de la même classe, et même de tous les vertébrés, par la forme de leur bouche, et qui paroissent avoir certains rapports avec diverses espèces de néréïdes et d’amphinomes.

Further reading

• “cyclostome” in Trésor de la langue française informatisé (The Digitized Treasury of the French Language).

English

Etymology

From Agnatha, from Ancient Greek ?- (a-, “without”) + ?????? (gnáthos, “jaw”)

Pronunciation

• enPR: ?g?n?-th?n, IPA^(key): /?æ?.n???n/, /æ??næ.??n/

Adjective

agnathan (comparative more agnathan, superlative most agnathan)

1. (zoology) Belonging or pertaining to the superclass Agnatha, the jawless vertebrates.
   • 2005, Tim Haines and Paul Chambers, The Complete Guide to Prehistoric Life, BBC Books, page 20:

     Haikouichthys is one of three species of jawless (or agnathan) fish to be found in the Early Cambrian period.

Noun

agnathan (plural agnathans)

1. (zoology) A member of the superclass Agnatha of jawless vertebrates.
   • 1956, D. R. Newth, "On the Neural Crest of the Lamprey Embryo", Journal of Embryology and Experimental Morphology, volume 4, page 358:

     Thus should the cranial neural crest in cyclostomes prove to be non-skeletogenous this might be a reflection either of its own primitiveness or of the different evolutionary origins and morphological status of the visceral skeleton in agnathans and gnathostomes.

   • 1992, Peter J. Hanley et al., "Hagfish Humoral Defense Protein Exhibits Structural and Functional Homology with Mammalian Complement Components", Proceedings of the National Academy of Sciences, volume 89, page 7910:

     The hagfish is an agnathan, a modern representative of the earliest evolved group of vertebrates, the ostracoderms or jawless fishes, which arose prior to the ancient placoderms (3).

Synonyms

• agnath
• agnatha

Hypernyms

• vertebrate

Hyponyms

• cyclostome
• ostracoderm

Coordinate terms

• gnathostome

Translations