Good evening folks. I'm trying to sort out the Cichlids in my store. I've heard that South American and African Cichlids should not be mixed, but with so many different Cichlids from so many places (most of them not labelled) I'm a little overwhelmed right now. I was hoping someone could point me to a quick list of common Cichlids ordered by where they originate. I'll be in the book store tomorrow trying to get a half-decent reference guide, but in the meantime, are there any general tips I should have regarding locations/species?

Sorry if my question is a little vague. It's been 6 o'clock for the last two hours now.