Yeah, I noted the caudal fin, and hesitated a bit there. It's possible there might be a hint of P. filamentosus here to get that influence, but certainly no more than 25%.
As you said, dorsal spines don't help; P. flavianalis can have 1-4.
I couldn't decide how much the appearance of the tail shape is "real" in the photo or if it was more of a matter of how the tail was curved/positioned when the photo was taken. And I can't see the tail well enough in the second photo.
All that being said, I can find no technical description which speaks to the caudal fin, therefore it appears indeed as a P. flavianalis to me.