I have improved it, or at least modified it, iteratively. I'll be happy to respond to Colchicum on the talk page. But insisting on a citation that the AA family lies in both Africa and Arabia is a bit like insisting on a citation that the Mediterranean lies between Africa and Europe. Sure, it's easy enough to do, but at what point does it simply become silly? If you'd like to expand a line into a paragraph, that's great, but for me the main point was mentioning the it, and providing a link for those who might wish to follow up on it.