This orchid came to the judging table on Saturday with the name of Arachnis cathcartii. It is not an Arachnis. We honestly had no idea what it was although from the images it appears to perhaps be African or Madagascan in origin.
It is not an Aerides, not a Mystacidium and not a Jumella.
To me it resembles closely Jumella flowers, except Jumellas have one flower per inflorescence. As you can see from the images there are multiple blooms per inflorescence.
It could be an Angraecum but the shape is not consistent with that genus. We are stumped.
There is always a chance that this is a hybrid of some kind. A hybrid of what I don't know.
It flowers a lot like Angraecum eburnum for example. But what is the other parent? Who knows??
I posted these images to make the point that sometimes at the judging, not every single decision is clear cut. I am not done digging. I am looking through eburnum like Angraecums with Jumellas to see if that leads anywhere because it is a floriferous and beautiful plant.
If we assume it is a hybrid and it was sent in for ID, that might not yield results. If it came to my team I would have recommended that the owner send in pictures and flowers in hopes of it being identified!
I wonder if it might be an unknown or rarely seen Angraecum species.
I thought that some one in our group may have seen this before or they might be growing something very similar.

The first thing coming to my mind is an Aerangis. Perhaps an Aerangis mystacidii or hybrid?
You said not Mystacidium, so Mystacidium capense is out.

Well I honestly thought of Mystacidium but look at the growth. This plant was 10" high with 1" leaves, and long inflorescences. Aren't Mystacidium more compact, fan shaped growths with broader leaves?

The same could be said for Aerangis Mystacidium.

Perhaps one of these or a hybrid of the two?

I'll check those out later.

This maybe is a 50-50 proposition. You know a primary hybrid where it's traits are one half of the pod parent and one half the pollen parent.
In looking at things like Jumella and Aerangis, they are generally very compact plants, monopodials, producing in the case of Jumella, single flowers on an inflorescence. In the case of Aerangis, they have upwards of twelve flowers. This plant in question was in a 5" plastic pot if I remember and was about 8-9" tall. I do not think that these small flowered Jumellas, Mystacidium, Aerangis, and Angraecums get to be that big.
So what could be the
other parent? Maybe Angraecum eburnum? The other parent bringing is size is not Magdalenae or sesquipedale. Along with eburnum, these guys would not only introduce vegetative size but a more Angraecum style flower resembling the Angraecum parent with larger lips and incredible texture.

If you look at images Australis provided as suggestions, I just do not think they can top out at 8-9" in height. I might be wrong.
Maybe Angraecum scottianum? I just don't know enough about that species.
I continue to search

Sounds a bit frustrating, Bill! I guess we may never know what it is.

Was the owner able to comment on the origin of the plant? Perhaps that might provide a lead.

I didn't get that involved to know exactly whose plant that it was.
It was our Holiday Party with 60+ people instead of our normal 15.

Another possibility is Angraecum longicalcar.

As I said, if it came to my team, I would have written on my "suggestions and comments" section that the owner tries to get it identified. The reasons being that it is award worthy and hopefully if it is a new or infrequent member of one of the genera, we could learn what. BUT in the event it is a hybrid, an African species expert might be familiar with it or have a better idea as to what the parents might be.

I just loved the delicate flowers and the compact aspect and its floriferousness.