Matskási István (szerk.): A Magyar Természettudományi Múzeum évkönyve 99. (Budapest 2007)

Bálint, Zs., Horváth, Z. E. , Kertész, K. , Vértesy, Z. ; Biró, L. P.: Observations on scale structures and spectroscopic properties of Polyommatus lycaenid butterflies (Lepidoptera: Lycaenidae)

Spectroscopy - The reflectance spectra (Fig. 13) show that all the investigated species have two reflectance peaks: (1) the main peak is in the visible range between 400 and 500 nm in accordance to the displayed blue colours and their hue, whilst (2) the secondary peak is below 300 nm that suggests all the species possess a pattern in ultraviolet. Table 1. Measurements in nm and filling factors taken on the scales of five Polyommatus species investigated. FF = filling factor of the microcells, LR = longitudinal ridges, CR = cross ribs, d = distance, w = width Taxon name FF LR CR Eros species group Polyommatus eroides 5.77 Polyommatus eros 4.83 Polyommatus erotides 2.53 Outgroup taxa Polyommatus ariana 2.56 Polyommatus icarus 1.96 Species belonging to the P. eros species group display similar spectral characteristics: their reflectivity is low between 10 and 30% in the visible with the main peak around 450 nm. The secondary peaks can be observed at 250 nm. The spectral properties of the species pair P. eroides and P. eros are almost identical, P. erotides displays a characteristic plateau between 500 and 600 nm with relatively high (30%) reflectivity compared to its sisters. The outgroup species P. ariana and P. icarus display strikingly different spectral characteristics both in qualitative and quantitative terms. They show strikingly higher main peaks of reflectance maxima (over 60%) between 400 and 450 nm. The secondary peaks they display are also higher in terms of reflectivity and shifted to 260 nm (Table 2). DISCUSSION Measurements, spectral distinctness and similarities - According to the results we presented the monophyly of eros-eroides-erotides reveals similar microand nanostructures plus spectral properties, but quantitative differences can w= 183.4; d= 1599.5 w = 181.9;d= 1401.6 w = 349.2; d= 1760.0 w= 196.3; d= 1404.4 w= 151.2; d= 1678.5 W =174.6; d= 1080.9 W = 85.8; d = 688.3 W = 95.5; d = 560.3 W = 92.3; d = 616.5 W = 69.6; d = 673.7