Cookies Policy

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Phylogeny and Ontogeny of Mammalian Middle Ear Structures

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this article

+ Tax (if applicable)
Add to Favorites
You must be logged in to use this functionality

image of Netherlands Journal of Zoology
For more content, see Archives Néerlandaises de Zoologie (Vol 1-17) and Animal Biology (Vol 53 and onwards).

The evolution of the mammalian middle ear in connection with the change of the mandibular articulation is one of the central topics of comparative anatomy and evolutionary biology of vertebrates. Both embryology and palacontology have contributed to the formulation of the theory of REICHERT and GAUPP. Fossil finds of advanced cynodonts and early mammals are well documenting this theory. These fossils demonstrate that within the synapsids a new sound transforming system evolved at the posterior angle of the mandible, which is most probably not homologous to that of sauropsids: the modified exoskeletal elements angulare ( = tympaniciun) and praearticulare ( = goniale) linked a newly developed eardrum with the articulare ( = malleus). In the early mammal Morganucodon, the 'tympanic-system' was still attached to the large dentary, which formed a secondary jaw joint just lateral to the primary quadrato-articular joint. Because in extant monotremes and eutherians, the tympanic and the eardrum develop ontogenetically underneath the otic capsule, it has so far mostly been assumed that this position be primitive for mammals (postulate of VAN KAMPEN); however, if the tympanicum is to be homologous to the angulare, this situation must be interpreted as a caenogenetic adaptation. Postnatal ontogenetic stages of didelphid marsupials can provide a morphological model explaining the translocation of the 'tympanic-system' from a primary mandibular to a derived basicranial position.

Affiliations: 1: Institute of Systematic Zoology, University of Tübingen, Auf der Morgenstelle 28, D-7400 Tübingen, Federal Republic of Germany


Full text loading...


Data & Media loading...

Article metrics loading...



Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to ToC alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
    Netherlands Journal of Zoology — Recommend this title to your library
  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation