

Looks like you were sent a little extra bonus.
And to me could be one of the Cryptoheros species, but too young to tell at this point.
Here is a young C nanoluteus to compare
young nics
Just a heads up, depending on how you plan to stock.
Beyond the obvious aggression problems
I find haitiensus (black nasty)need much warmer temps, than some of the others on your list, mid to high 80sF.
Whereas beani do much better (long term) in cooler temps, for me they did best around 70'F.
And the others somewhere in between.