Dvg said: "And hopefully that bump will develop into something serious." That could be interpreted in a good way, or a bad way.
N. naga is an awe inspiring species! I'd like to see it when it when the lid frills out.
Clue, most hopefully in a good way.
It seems that some of these species with appendages or tongues under their lids have been rather reluctant to show these unique features in cultivation...case in point, N. lingulata.
A little off topic here but just a couple of days ago I was looking at pictures of N. izumiae and found that it also has an appendage under it's lid. This appendage is a distinguishing feature between N. singalana and N. izumiae.
Seems I'm learning new stuff everyday...which is probably a good thing.