Re: NANFA-- anyone ever toyed with this idea?

R. W. Wolff (
Mon, 19 Jan 2004 11:36:46 -0600

Viviparus subpurpureus is found locally in sandy areas in the marsh. Scroll
down to the bottom of this page for pictures of the shell. It has a trap
door. They are generally smaller, about nickle sized. This appears to be the
only thing that draws them is deep piles of sand. They are either found in
sand washes ( shallow humps in wide open areas that wind action keeps sand
"sandy") and in areas where current creates sand bars. Here is the link, I
hope it works.

The specie I find could be this one on that same page, Campeloma decisum,
but it doesn't look quite as much like the ones I find.

There are actually a lot of invertrabrates in freshwater that might work.
Many though are larvae of terrestrial insects. Some Caddis fly species
larvae all do neat things with sand, besides just building cases out of it.

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