Keys out to leucophlebia, with cephalodia raised at edges and veins on lower surface distinct and gradually fading from white to black (2nd photo). but I'm trying to drill down on my Pelts, so if anyone wants to argue that it looks closer to brittanica, I could see that, too.... I might be misinterpreting the color and patterns of veins underneath. definitely not apthosa, bc of how free the cephalodia are. unfortunately it's not fertile, so can't check apothecia for green underlayer...