Simple and complex, sexually dimorphic retinal mosaic of fritillary butterflies
Cite this dataset
Belušič, Gregor et al. (2022). Simple and complex, sexually dimorphic retinal mosaic of fritillary butterflies [Dataset]. Dryad. https://doi.org/10.5061/dryad.gmsbcc2p2
Butterflies have variable sets of spectral photoreceptors that underlie colour vision. The photoreceptor organization may be optimised for the detection of body colouration. Fritillaries (Argynnini) are nymphalid butterflies exhibiting varying degrees of sexual dimorphism in wing colouration. In two sister species, the females have orange (Argynnis paphia) and dark wings (A. sagana), respectively, while the males of both species have orange wings with large patches of pheromone-producing androconia. In spite of the differences in female colouration, the eyes of both species exhibit an identical sexual dimorphism. The female eyeshine is uniform yellow, while the males have a complex retinal mosaic with yellow and red-reflecting ommatidia. We found the basic set of UV-, blue- and green-peaking photoreceptors in both sexes. Males additionally have three more photoreceptor classes, peaking in the green, yellow and red, respectively. The latter is the basal R9, indirectly measured through hyperpolarisations in the green-peaking R1-2. In many nymphalid tribes, including the closely related Heliconiini, the retinal mosaic is complex in both sexes. We hypothesise that the simple mosaic of female Argynnini is a secondary reduction, possibly driven by the use of olfaction for intraspecific recognition, whereas vision remains the primary sense for the task in the males.
Electrophysiology, single cell recording.
Histology, light microscopy.
Average sensitivity values, normalized, x(nm) = [300:5:700].
Absorbances of pigment granules, 2 um sections
United States Air Force Office of Scientific Research, Award: FA9550-15-1-0068
Slovenian Research Agency, Award: P3-0333
Ministry of Education, Science and Sport, Award: 5442-1/2018/434
Japan Society for the Promotion of Science, Award: 18H05273
Japan Society for the Promotion of Science, Award: 17K07485
Japan Society for the Promotion of Science, Award: 16J07688