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Have found very different patterns of wing venation of the species Trichocera regelationis (if they are correct)... How is that possible? I mean, in other cases, such a large amount of variation would serve to differentiate distinct species whereas in this case it is assumed to be within-species variability?

1) Wikipedia (https://commons.w...ds_-_4.jpg). R4+5 begins in the middle of r-m. Male specimen.