sentences:  This "grazing iridescence" is brought about through diffraction of light (after back reflection) by the wings' extremely steeply set, multilayered rib-like scales (rather than the ridge-lamellae of most other iridescent butterflies, such as "Morpho" species).Such limited-view iridescence was previously only known from one other species, the lycaenid "Ancyluris meliboeus".In "A. meliboeus", however, the iridescence is produced by ridge-lamellar scales and features a wider range of colours.