Here is a blurry pic until I can get the ... ummmm ... technical issues sorted out. Obviously, it's operator error and I'd rtfm if I could find it.
The blurry brown is the sheath. The brown on the aerial root in front of it is from its high light environment.
There is no evidence of a 'node' that might produce a future leaf which adds to the peculiarity, but as you say Camille, maybe that will follow. It would be nice to hatch a little one for the heartache and hassles.