Thank you for your reply Paul. I have researched this for quite a while now and what you said is what I pretty much come up with as well. The color the animal is primarily lacking would indicate what it would be refered to as. I also have come to the belief that an anerythristic pretty much has to lack red. While an axanthic could lack either red or yellow. My reason for saying so is that (anerythristic) broke down would be (An=lacking, erythristic=erythrism a name for a redish pigment condition). And then (A=lacking, xanthic=xanthophores an actual name for a chromataphore that produces red and yellow pigments). Meaning that Axanthic would be the "politicaly correct term" that would cover anything that lacks the xanthophores, while the term anerythristic would only cover the lack of red. So an animal that normaly has red and yellow colors would by true definition be axanthic for example a brooks kingsnake.
cheers, Celt

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