Thanks to all and a special hello to Ian.
I am aware that on this board there are experts who dived deep into this matter. We have had the tapiriceps / splendens discussion for six years, for example
http://www.orchidboard.com/community...m-stumped.html
We have also had posts of really beautiful flowers of this complex here. Knowing the difficulties I wrote cautiously that xtapiriceps is sometimes / by some people regarded as a synonym to xsplendens. My mentioning might also be helpful for people who use a search engine.
In the vast hybrid swarms in nature hybrids might be crossed back and forth, who knows.
I suppose that the difference between both depends more, if you go along with Reichenbach fil. or with Cogniaux and the colourful illustration in Lindenia and its many varieties.