The desert comes in two forms; the desert ghost which is recessive and the "plain" desert which is co-dom. I don't know who brought the first ones over from Africa, but I believe Stan Chiris (sp?) started working with the co-dom form several years ago. Pro Exotics bought Stan's stock when he left the business I believe. Robyn with Pro Exotics is really taking this co-dom desert morph to a new level with all the combos produced. I also know that Mark and Kim Bell have been working with the recessive desert ghost form for quite awhile.
I really want a tiger (desert enchi) male, but I've got to wait a bit due to the current prices.