Re: Notarium vs. Synsacrum

["Matthew Troutman" <m_troutman@hotmail.com>]

>I've never heard this in context here. By definition, a synsacrum is a 
>fusion of dorsals to the sacrum in a series that does not break. A 
>notarium, I believe, is an independant fusion of dorsals to each other, 
>independant of the sacrum, or synsacrum.

    It is an independent development. The two have nothing to do with 
each other. The synsacrum supports the pelvis and the notarium supports 
the shoulder girdle.  

 Birds, though, have the entire 
>dorsal column fused, so they either fused a notarium to the synsacrum, 
>or simple proceeded with the synsacral development.

    No, they have the dorsal series reduced and the notarium is the 
fused dorsal vertebrae. 

MattTroutman

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