In the same savegame, 1st base has 3 Aquatoid Medics available for research and 3 not yet researched live aliens (all 3 are 2x2 specimens). To quickly check (at least those 3) you could quickly research them in the original and transfer the save to OX to see if they appear or not. They shouldn't but who knows.
Just dawned on me that Medics unlock corpses as well as live ones, so the above may differ slightly but you get the picture. I read on
UFOpaedia that researching Calcinite corpse via Medic does not unlock Vibro Blade research (actual corpse is required) so perhaps game stores Medic's stuff in another place OX doesn't look. Just a thought.
Thanks for a quick response, you are worthy of that avatar. Yippee Ki Yay, motha...