I appreciate your reading, @hlezama. Marc de Civrieux was, without a doubt, an important researcher, one of the most outstanding that the Universidad de Oriente de Venezuela hosted. Unfortunately, I believe that his contributions have not been fully valued both in our university and in the Venezuelan and American academy in general.
The mythical symbol of the "feathered serpent" -Quetzalcóatl, for the Nahuas- is, from my knowledge, one of the most significant of the primitive cultures (in the best sense, that is to say, the first); its cultural richness is very complex and surprising.