Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 101. (Budapest 2009)
Bálint, Zs., Moser, A., Kertész, K., Biró, L. P. & Parker, A. R.: A supposition: structural colours resulting from both natural and sexual selection on an individual wing in the butterfly genus Cyanophrys (Lepidoptera: Lycaenidae)
76 Zs. Bálint, A. Moser, K. Kertész, L. P. Biró & A. R. Parker Fig. 24 (black & red), and in Fig 25 (blue). We think that this phenomenon has nothing to do with UV protection (cf. VIGNERON et al. 2005). Hence this minor reflectance peak is neither a visual signal nor a sign of a protecting mechanism, but most likely it is just a consequence of the layered character exhibited by the structure giving the structural colour. Ventral wing surfaces The ventral wing surfaces measured revealed almost identical spectra. We could not detect any pattern that could characterize a sex, a taxon or a certain geographical region. This indicates that the green colouration of the ventral wing surface, produced by a polycrystalline nano-architecture (KERTÉSZ et. al. 2006, BÍRÓ et al. 2007), is a generalized signal, probably involved in camouflage against predators. This green colour, therefore, is under the influence of natural selection. Further investigation is in progress to understand better this camouflage phenomenon. We have found that the spectral properties of Acer , Carpinus, Fraxinus and Qiiercus leaves used by perching male Callophrys rubi (LINNAEUS, 1758) individuals are identical with those measured for the ventral wing surfaces of the Cyanophrys butterflies (Fig. 26). Diversification mechanism Diversification at the species level requires barriers to gene exchange, and in the case of the dorsal (blue) fore wing signals the generation of premating barriers is highly probable, as lycaenid eyes are calibrated to this special purpose (SLSON-MAGUS et al. 2006). Moreover, dorsal forewing signals as pre-mating barriers can hypothetically work in all geographic models of speciation (FUTUYMA 1998). The pre-mating barriers based on dorsal fore wing signals can work in allopatric, parapatric and sympatric models, as well as in the founder effect. As it is presumed, morphological changes in colour-generating (photonic) structures can may be evolutionary less costly than evolving a new type of pigment, considering the "starting points" the butterflies possess for evolution (PARKER 2006, BIRÓ et al. 2008). Even in the theoretically most problematic sympatric and founder effect models, Annls hist.-nat. Mtis. natn. hung. 101, 2009
