Re: Sclerotic rings

[Dann Pigdon <dannj@alphalink.com.au>]

I had always assumed that sclerotic rings were merely there to support
the eye in animals where the orbit was much larger than the eye itself.
In mammals the eye fits the orbit snuggly, hence we have no need for
additional support. Is this not the case?

Have sclerotic rings ever been indentified in Tyrannosaurs? It would
seem that the key-hole shape of the orbit would not require one, unless
the eye was still much smaller than the space it occupied.


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Dann Pigdon                   Australian Dinosaurs:
GIS Archaeologist           http://dannsdinosaurs.terrashare.com
Melbourne, Australia        http://www.alphalink.com.au/~dannj/
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