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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