I looked at some of the screens but they did not show anything for races until you've encountered them. I'll try the f2 one just to be sure. At any rate, I'm sure they are not neutrals since I added them manually.
I logged in as one of the AIs (praetorian) and it had expanded some, so they are out there. Luckily that AI wasn't close to seeing its position shouldn't ruin the suspense
More Research:
Organic Technology 2
Physics
Repair 2
Shields 1
Sensors 1
Engine Overloading Weapons 1
Deep Space Mining 1
Shield 2
Engine Overloading Weapons 2
Industry
Shields 3
Engine Overloading Weapons 3
Applied Research 1
Computers 1
Point Defense Weapons 4
Shields 4
I've had over 50 turns of build up. I'm starting to build LC en masse. I wonder how close to MEE I'm getting...