Nothing other than the examples given with the major adversary races (Cardassian, Ferengi, Klingon, and Romulan). In terms of mechanics, the formula is basically 'choose three attributes to receive a +1 modifier, give them <species name> as a trait and summarize what that means, and assign or create three suitable talents'. Greater detail is largely left to the individual gamemaster.
“In our every deliberation, we must consider the impact of our decisions on the next seven generations.”
-- Great Law of the Iroquois Confederacy