IMIS | Flanders Marine Institute
 

Flanders Marine Institute

Platform for marine research

IMIS

Publications | Institutes | Persons | Datasets | Projects | Maps
[ report an error in this record ]basket (0): add | show Printer-friendly version

Functional morphology and homology in the odontocete nasal complex: Implications for sound generation
Cranford, T.W.; Amundin, M.; Norris, K.S. (1996). Functional morphology and homology in the odontocete nasal complex: Implications for sound generation. J. Morphol. (1931) 228(3): 223-285. hdl.handle.net/10.1002/(sici)1097-4687(199606)228:3<223::aid-jmor1>3.0.co;2-3
In: Journal of Morphology (1931). The Wistar Institute Press/Wiley: Philadelphia, Pa . ISSN 0362-2525, more
Peer reviewed article  

Available in  Authors 

Keyword
    Marine

Authors  Top 
  • Cranford, T.W.
  • Amundin, M.
  • Norris, K.S.

Abstract
    The site and physiologic mechanism(s) responsible for the generation of odontocete biosonar signals have eluded investigators for decades. To address these issues we subjected postmortem toothed whale heads to interrogation using medical imaging techniques. Most of the 40 specimens (from 19 species) were examined using X-ray computed tomography (CT) and/or magnetic resonance imaging (MR). Interpretation of scan images was aided by subsequent dissection of the specimens or, in one case, by cryosectioning. In all specimens we described a similar tissue complex and identified it as the hypothetical biosonar signal generator. This complex includes a small pair of fatty bursae embedded in a pair of connective tissue lips, a cartilaginous blade, a stout ligament, and an array of soft tissue air sacs. Comparing and contrasting the morphologic patterns of nasal structures across species representing every extant odontocete superfamily reveals probable homologous relationships, which suggests that all toothed whales may be making their biosonar signals by a similar mechanism.

All data in IMIS is subject to the VLIZ privacy policy Top | Authors