Urostyle

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urostyle

[′yu̇r·ə‚stīl]
(vertebrate zoology)
An unsegmented bone representing several fused vertebrae and forming the posterior part of the vertebral column in Anura.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Urostyle

 

a rodlike bone in the caudal portion of the vertebral column of some vertebrates, formed by the fusion of all caudal vertebrae (in salientians) or of only the terminal caudal vertebrae (in bony fishes). Together with the hypural bones, the urostyle supports the radials of the homocercal fin of bony fishes.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.