The Kalanorians were a race of Humanoids that inhabited the planet Kalanor.
Despero, a long-time enemy of the Justice League of America was a member of this species.
They were a physically powerful species, with strength far greater than most Humanoids. This was at least the case with Despero, if not other members of his species.
Their skin was pretty much red, though a bit pinkish purple, and they usually had pointed ears. They also had a strange fin-like growth on their head.
They didn't have hair, so its' doubtful they were mammals, though very likely they could have been reptiles, but this is uncertain.
At least some Kalanorians had three eyes. They had incredible mental abilities which allowed them to read minds, cast illusions and even control minds. And that's just some of what they could do.
Their technology seemed to be far more advanced than Humans. They had teleportation devices that resembled chess sets, and spacecraft capable of interstellar spaceflight.