Hi, Mogbo,

 It depends crucially on the region in which you are working. Let us know, and I am sure that there will be some leads.

I am currently in Africa, Working in Nigeria

Ok, there are three people who have worked in W. Africa that I know of::

 Rosemary Egonwan (I do not have an email address for her)

Peter Tattersfield

Ton de Winter

 If you email me direct at r.cameron@ sheffield.ac.uk

I can give you email addresses for them. i don't think i should post them here. You might find addresses for all three via websites.

i would also like to know about snail identification

I am now working on freshwater gastropods of Agulu Lake, Nigeria, and may be able to assist. Check me at [email protected]