An Erythrodes sp. I am not sure which species this orchid is

This Erythrodes sp. was growing next to what I believe to be plants of Erythrodes plantaginea, but the flowers and the inflorescences are different.  You can compare both plants looking at this post:  http://ricardogupi.blogspot.com/2010/12/erythrodes-plantaginea-terrestrial.html
It is clearly not Erythrodes hirtella.  Perhaps I am not familir with the variation in flower form and inflorescesce in these species, but for all that is worth here is the photo for comparison.  Comments are welcome.