Today I noticed that my macrantha had caught a gnat on its stem rather than a trap. If you are familiar with macrantha, the whole plant, including the climbing stem and the petioles, is basically covered with tentacles. This was the first time I have seen it catch anything outside of a trap. I wonder if it is able to digest things caught on the stem and leaf bases.
Here are a couple pictures. In the first one you can see it to the immediate left of the pot, and in the second it is in the middle of the picture. Apologies for the images; the camera on my phone couldn't focus any closer.