Re: Medullary Bone Distribution in Archosaurs

[Jura <pristichampsus@yahoo.com>]

--- "Stephen V. Cole" <adbinc@arn.net> wrote:

> >Medullary bone, a
> >highly mineralized, bony reproductive tissue
> present
> >in the endosteal cavities of all extant egg-laying
> >birds thus far examined, has recently been reported
> in
> >Tyrannosaurus rex. ..... alligators .... shows no
> >differences on the endosteal surfaces of the long
> >bones, and no evidence of medullary bone
> 
> Do we know anything about the presence or absence of
> medullary bone in Sauropods, Pterodactyles, or
> the bird-hip dinosaurs (ducksbills, ceratopsians,
> etc.)?
> 
++++++++++++++++++++++++++++++++

Unknown until someone breaks a couple of sauropod and
ornithischian bones in hopes of finding original
cellular material.

Jason

"I am impressed by the fact that we know less about many modern [reptile] types 
than we do of many fossil groups." - Alfred S. Romer


 
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