Looks like a maxima to me. There appear to be about 9-11 folds on the mantle and it should be fine where it is unless it falls or something else odd occurs. The only thing I would worry about is it gaping (the mouth being that far open). Hopefully it closes within a few days.
ima say maxima too, although squamies and maximas look very similar when they're smaller.
actually, on second thought, maybe it is a squamosa. that peach color in the mantle is seen a lot more in squamosas IME. you cant really go by that though. shell will be the only way to know for sure.