freshwater mollusc help

[ghanley@xxxxxxxxxxxxxxxx (guy a hanley)]

I am interested in contact with someone who works with freshwater 
molluscs, either fossil or modern.  I am currently putting together a 
paper on the fossil mollusca of Fossil Lake Oregon ( pleistocene) and 
would like some more input on population distributions and other 
ecological factors relating to: Helisoma newberyyi, Helisoma 
trivolvis, Vorticifex effusa, Valvata virens, Lymnaea stagnalis 
appressa, and the freshwater clam Pisidium sp.  please E-mail me 
directly at ghanley@unlgrad1.unl.edu if you could be of assistance

Cheers

Guy Hanley