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The otoliths of a chimaera, the New Zealand elephant fishCallorhynchus milii

 

作者: R. W. Gauldie,   K. Mulligan,   R. K. Thompson,  

 

期刊: New Zealand Journal of Marine and Freshwater Research  (Taylor Available online 1987)
卷期: Volume 21, issue 2  

页码: 275-280

 

ISSN:0028-8330

 

年代: 1987

 

DOI:10.1080/00288330.1987.9516223

 

出版商: Taylor & Francis Group

 

关键词: otoliths;otoconia;ductus endolymphaticus;elephant fish;Callorhynchus milii;Holocephalidae

 

数据来源: Taylor

 

摘要:

The elephant fishCallorhynchus milii(Holocephalidae) has a pair of well‐developed otoliths corresponding (in relative position) to the astericus and sagitta in teleosts. Although the elephant fish apparently lacks a lapillus, there are a well‐developed set of cristae at the base of the semicircular canals. The cristae presumably serve the same balance function as the lapillus. The semicircular canal system also contains a well‐developed ductus endolymphaticus, filled with irregular calcium carbonate otoconia. A different type of oto‐conia are found fused together to form the two otoliths. This latter type of otoconia, a crenellated spherulite, is similar to those found aggregated in the otolith of the lungfishNeoceratodus forsteri, and found as loose otoconia in association with the sagitta in some species of teleosts.

 

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