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Agnathan vs Agnathous - What's the difference?

agnathan | agnathous | Related terms |

Agnathous is a related term of agnathan.



As adjectives the difference between agnathan and agnathous

is that agnathan is belonging or pertaining to the superclass Agnatha, the jawless vertebrates while agnathous is jawless.

As a noun agnathan

is a member of the superclass Agnatha of jawless vertebrates.

agnathan

English

(wikipedia agnathan)

Adjective

(en adjective)
  • (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

    (en noun)
  • (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

    agnathous

    English

    Adjective

    (-)
  • Jawless.
  • * 1876 , , “On the Lingual Dentition, Jaw, and Genitalia of Carelia, Onchidella, and Other Pulmonata”, Proceedings of the Academy of Natural Sciences of Philadelphia , page 185:
    • The Onchidiidæ are described as agnathous , but I am confident of having observed the jaw figured.
  • * 1900 , , “Notes on Drepanaspis Gmündenensis'', Schlüter”, ''Geological Magazine , page 158:
    • The mouth is a transverse slit, which shows no teeth, nor any jaws properly so called, and therefore affords an apparent support to the agnathous theory of the Ostracodermi.
  • * 1997 , Gene S. Helfman, The Diversity of Fishes , Blackwell Science, ISBN 0-86542-256-7, page 152:
    • This and related agnathous (jawless), finless forms inhabited shallow seas or estuarine habitats[…].
  • * 2007 , James Brown, “Sequencing the Braden Style within Mississippian Period Art and Iconography”, Ancient Objects and Sacred Realms , University of Texas Press, ISBN 0-292-71347-9, page 235:
    • Parenthetically, this line treatment suggests an attempt to mimic the agnathous (jawless) head, if we suppose that the jaw area was colored suitably dark in contrast to the face proper.
  • (pathology) Afflicted by or characteristic of agnathia.
  • * 1886 , “Exhibition of Specimens: Meeting V”, Transactions of the Edinburgh Obstetrical Society , volume 11, page 79:
    • Dr Underhill exhibited an agnathous and hydrocephalic fœtus. This was an instance of the rare abnormality due to defect of the lower jaw.
  • * 1893 , “Proceedings of the Anatomical Society of Great Britain and Ireland: November 1892”, Journal of Anatomy and Physiology , volume 27, page xvii:
    • Upon this view an agnathous fœtus may be regarded as sometimes due to a posterior dichotomy, which has ultimately become a complete separation, and in which the two fœtuses have developed equally during a considerable part of intra-uterine life.
  • * 1964 , M. W. Fox, “Anatomy of the Canine Skull in Low-grade Otocephaly”, Canadian Journal of Comparative Medicine and Veterinary Science , volume 28, pages 105–106:
    • In all the neonates examined from the partially agnathous strain, there was no obvious agenesia of the lower mandible.

    Synonyms

    * (jawless) agnathic, jawless * (afflicted by agnathia) agnathic

    Related terms

    * agnath * agnatha * agnathan

    References

    * agnathous] in , volume I, 1888 English terms with alpha privatives English words suffixed with -ous