(Photo shared by permission: Keith Willmott)
Nope! Keith Willmott sent me this amazing picture in response to my query about sexually dimorphic mimicry. This is a mating pair of Oleria baizana (Nymphalidae: Ithomiini), in which males and females belong to different “transparent” Müllerian mimicry rings. See also Willmott & Mallet 2004 for some other examples of sexually dimorphic mimicry in the Ithomiini (in the online appendix).