Help Needed Identifying Spiral Shell found in Creek

[paul monfils]

Hello,

I'm not an expert on fresh water snails, but this does not appear to be a fresh water species.  I base this opinion on two observations: First, there is nothing resembling this shell in the several books I have on fresh water gastropods; and second, this looks very much like a Turritella, which is a marine genus.  I can't say for sure just which species of Turritella it is.  They can be difficult to identify.  One distinct possibility you need to consider is that it may be a fossil Turritella that washed out of some fossil deposit the creek flows through. A friend of mine in Tennessee commonly finds marine fossils in a fresh water creek there.  <span class="petit">--Last edited by Paul Monfils on 2009-08-10 01:16:57 --</span>