On Jan 9, 2008 2:15 AM, Eduard Heiman <[log in to unmask]> wrote:
>
> A question to specialists in fossils:
> if it is possible to know which of predecessors of Pustularia bistrinotata,
> Pustularia cicercula and Pustularia globulus is older?
> Thanks beforehand
> Ed

I don't know if anyone has investigated the systematics of this group
in detail to be able to assign different species to lineages.  There
are fossil records for several species.

--
Dr. David Campbell
425 Scientific Collections
University of Alabama
"I think of my happy condition, surrounded by acres of clams"

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