snailtim's Identifications

Few questions for anyone who knows freshwater snails: are these three the same species? If so, what species? If they are not all the same, what is each and what are the distinguishing characteristics? Worth noting: these were found amongst several banded mystery snails (Viviparus georgianus, synonymous with Callinina georgiana). A couple of the V. georgianus definitely had less visible banding, but looking inside the empty shell easily revealed the bands. I thought at first that may be the case with these, but I do not see any banding even on the inside and the shape is more elongated than most V. georgianus I've personally seen. Scale: the ruler shown is in inches, so they are roughly between 0.5 in and 1 in. Too large to be Bithynia tentaculata? The small ones are certainly the wrong shape to be baby Cipangopaludina chinensis. Could they be Campeloma desicum??? Help!

Need help IDing: is this Bithynia tenaculata, or a Campeloma? Or neither? Thought at first it could be a baby Cipangopaludina chinensis as I know they can be as small as a grain of rice, but I actually have some baby C. chinensis right now (I work with aquatic invasive species) and I'm surprised to see that the newborns seem to have a different shape (not as elongated yet). Anyone really good at IDing freshwater snails: I would love your help and an explanation of IDing characteristics!