Actually this is not a photo post, but linking to a video. And moreover, strictly speaking not about Neotropical snails; consider it one of my “malacological tidbits”.
The link is here, and shows research done in Singapore how a predatory flatworm ingests land snails. In contrast to some other predators this worm succeed in leaving no signs. An intact shell is all he leaves, so one has to be lucky to catch the two in their act (although I definitely have the impression this movie was made under controlled circumstances).
It might be interesting to observe in the field on predation of Neotropical snails too, since such ecological details are very scarce and data are scanty.
Many thanks to Liew Thor Seng for distributing this among colleagues.