Fig. 2From: Forewing color pattern in Micropterigidae (Insecta: Lepidoptera): homologies between contrast boundaries, and a revised hypothesis for the origin of symmetry systemsThe two existing hypotheses for the origin of symmetry systems from primitive microlepidopteran wing pattern elements. a Lemche’s “split-band” hypothesis. b Nijhout’s “fused-spot” hypothesisBack to article page