I found this thread just recently and so hope that my post is not too late to add to the discussion. It obviously is a hybrid of Spath plicata[a very variable specie] and I think, Spath kimbaliana - judging from its overall colour and especially the shape of the lip and the red-purple colour at the tip . Incidentally if you have different varieties of spathoglottis growing close together they may naturally hybridise and seeds germinate around the clumps of spath esp on moss-covered rocks and bricks. We've had them happen in our gardens. So once in a while look for seedlings near your plants. Most of the hybrids found today happened in this way and that's why many of them are not registered.