A Few Snail Identifications Needed

[satchellwk]

Hello, I have a few wild caught land snails from Tuscaloosa county, Alabama, USA, and I am in need of some identifications. I honestly don't know how many different species I have, but here are to two most distinguishable ones:
Here's the largest, and I have three, maybe 4 of them. They are very active, and at least one or two are out and about at any given time. they also are very friendly, and are actually difficult to make go into their shell. They were found under a board that was covering a manhole in an open field.



(sorry you can't see the aperture, I couldn't get him to go inside)

Here's the other most noticeable species. They are a bit more shy and rarely come out except for at night. they were for the most part found under logs in forested areas.




Thanks for looking, any help is greatly appreciated. If anyone has any questions, I would be happy to answer them.

[brunni]

It seems Alabama is relatively rich in aquatic and land mollusks. I know absolutely nothing about them but a list has been published of their names ( it would be necessary to google images for each species checking for possible matches.)
www.unc.edu/~keperez/alabamamollusks_list.htm

You could also also try your libraby for this book :
Walker, Bryant. 1928. The Terrestrial shell-bearing mollusca of Alabama. Ann Arbor, Mich.: University of Michigan Museum of Zoology. (Misc. Pub. 18). Alabama Museum of Natural History. (Museum Paper No. 8)

Finally you can contact the North Alabama Shell Club and ask them if any of their members could assist you in identifying the species in your photos.

Good luck !

[satchellwk]

Thanks for the info!
After perusing that website, I've come up with a few potential matches. The second one I posted seems to be a member of the Genus Anguispira in the family Discidae, however, it could be one of six ore possibly more species. The first one, however, is proving to be more difficult to identify. It seems more likely than not to be a member of the family Polygyridae, however it could be in one of 9 genera and who knows how many species. I'll probably go look for that book sometime soon or ask someone at the natural history museum here in town. Any more help is welcomed.

[coyote]

If there are any wildlife refuges, natural preserves or state or county parks nearby, you could contact them and ask if they have a staff biologist who could answer questions about local snails. If they don't, ask them if they know who does. I just keep on asking questions until I connect up with someone who does know something about snails.

Also, there might be a magazine devoted to your local natural history (the museum might know). Someone on the staff there might know someone who knows someone who knows something about snails.

[brunni]

I appreciate the predicaments you are facing, having been down the same road before you ( but with other families and genera from another geographical zone - I study West African ). If its any consolation, you can be sure that others ( scientists, game wardens, collectors, etc ) have studied them before and they are known.
Your photos are very good and indeed the second shell looks like an Anguispira species. But which one ? They are a very pretty family. Seems the geographic location can help resolve which particular species may be involved ?
animaldiversity.ummz.umich.edu/site/accounts/classification/Anguispira.html
www.fcps.edu/islandcreekes/ecology/eastern_forest_snail.htm

[molluscainthehouse]

Could the second one be Anguispira strongylodes? And the first is definitely some kind of Polygyrid. Does the first one have any teeth on the aperture?