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Surface morphology of basilar papilla of the tufted duck Aythya fuligula , and domestic chicken Gallus gallus domesticus
Author(s) -
Manley Geoffrey A.,
Meyer Birgid,
Fischer Franz Peter,
Schwabedissen Gabriele,
Gleich Otto
Publication year - 1996
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/(sici)1097-4687(199602)227:2<197::aid-jmor6>3.0.co;2-6
Subject(s) - biology , major duodenal papilla , morphology (biology) , gallus gallus domesticus , anatomy , zoology
Quantitative details of the surface morphology of the hearing organ, the Papilla basilaris, as seen in the scanning electron microscope are described for the tufted duck Aythya fuligula and for comparison for the domestic chicken Gallus gallus domesticus, for which some published information is already available. As in the other avian species investigated to date, each papilla shows a unique constellation of features. The papilla of the tufted duck is 3.5 mm long in the unfixed state and contains 8,200 sensory hair cells. It shows systematic changes in its surface features along the length and across the width of the sensory epithelium. In general, its features and those of the chicken Papilla basilaris can be described as relatively primitive in comparison with other species. The tufted duck papilla does, however, show one feature that has so far been found to be well developed only in advanced papillae; the number of stereovilli per hair cell bundle is generally much higher on hair cells of the neural than those on the abneural side. This difference is only weakly developed in the chicken. It is clear that features considered to be evolutionarily advanced were acquired independently of one another during evolution and that each bird species can show a mosaic of primitive and advanced features. © 1996 Wiley‐Liss, Inc.