The identification of spectral receptor types in the retina and lamina of the dragonfly Sympetrum rubicundulum

摘要: Photoreceptors and monopolar cells in the ventral eye ofSympetrum rubicundulum have been recorded from intracellularly stained with Lucifer yellow. Units four types of spectral sensitivity were found having λmax at 340, 410, 490–540 620 nm. On basis a significant difference half bandwidth ofS(λ), green receptors are separable into two subgroups 490 540 The fluorescence marking reveals that R5/8 R2/3 receptors; R1/4 is either UV or an orange cell. Discrimination between members three matched pairs R2 & 3, R5 8, R1 4 has not possible. R7 violet receptor, R6 probably additional receptor; these long visual fibres. No besides (620 nm) sensitive to polarized light, whereas dorsal highly light. light interpreted as adaptation increase contrast conspecific animal shorter wavelength predominantly horizontal E-vector, such provided by reflections on water's surface.