Oh, yes. Definitively. Rivain's foremost expert on butterflies and-- and natural fauna-- um, Torroja, Tomas Torroja--his text on the local specimins, the only text to be consulted, if, um, if you are looking in Rivain, specifically--Torroja mentions nothing of the yellow admirable. And if anyone in Rivain would have mentioned the yellow admirable, it would have been Torroja. He would have written of it. Extensively.

If this is the admirable, then--we can conclude, most definitely, that this is not Rivain. Definatively.