Snails in need of IDs

[HazelSnail]

Hello!

A few days ago I went on a hike, and found a load of new snails! The trail I went on took me down a steep cliff next to a waterfall, and on the cliff face were many snails. They seemed to be eating the rock, what I can only assume were calcium deposits, and they were also feeding on lichen. I collected 12 snails total, one triodopsis sp, one southern flatcoil, one snail I think is neohelix sp, possibly neohelix abolabris, and the rest are in need of ID, but they are all the same species (I think). They were all found in Branson, Missouri. 


Some images: imgur.com/a/usfUl

And here are some images of the possible neohelix snail, as I'm not sure on the ID: imgur.com/a/AVTCR 

Thanks! 

[astana]

Ahhh, those are gorgeous snails. I'll keep an eye out for references as to which species they are.

[Liguus]

I've seen other people's pictures of similar snails but I couldn't determine what they are. I know they're in the Polygyridae family, but haven't ever seen that morphology out along with a proper ID and description in the books or online guides. It may take some digging. Do these have three "teeth" on the shell lip when they retract fully?

[HazelSnail]

It only has one small parietal tooth.