User blog comment:PitchBlack696/Laviente/@comment-4009941-20130227043917/@comment-1712810-20130228173120

Well, going by in-game logic of past games... Kirin and Yama Tsukami are technically "unknown" creatures and classified as Elder Dragons because nobody can figure out what they are exactly. So I think it's fair if we do the same for Raviente. The Frontier devs clearly didn't feel like being bothered giving away information.

Which brings another question - have any Frontier monsters ever had ecology art books released?