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Agnathan vs Agnathia - What's the difference?

agnathan | agnathia | Related terms |

Agnathia is a related term of agnathan.



As nouns the difference between agnathan and agnathia

is that agnathan is a member of the superclass Agnatha of jawless vertebrates while agnathia is a birth defect in which the mandible is missing.

As an adjective agnathan

is belonging or pertaining to the superclass Agnatha, the 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

    agnathia

    English

    Noun

    (-)
  • (pathology) A birth defect in which the mandible is missing.
  • * 1831 , William West, translation of , A Treatise on Pathological Anatomy , Hodges and Smith, volume 2, page 283:
    • When there is agnathia , instead of the inferior maxillary bone we find nothing but a kind of tubercle formed of skin, cellular tissue, fat, and some few muscular fibres.
  • * 1907 , and T. Mitchell Prudden, A Text-Book of Pathology , eighth edition, William Wood, page 304
    • The lower jaw may be absent (agnathia ).
  • * 2006 , Mark I. Evans et al., Prenatal Diagnosis , McGraw-Hill, ISBN 0-8385-7682-6, page 240:
    • As such, it is often accompanied by agnathia , a congenital absence of the mandible[…].

    Related terms

    * agnath * agnatha * agnathan * agnathous

    References

    * English terms with alpha privatives English words suffixed with -ia