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In the mayfly genus Heptagenia, the nymphs have asymmetrical mandibles. One species has the asymmetry reversed relative to the other species. Its seems that the left-right body axis has swapped once

This made me wonder about left-right asymmetry in Diptera. As far as I know, this occurs in the male genitalia of many higher flies. Are there examples of asymmetry in other body parts?

Is there any information on such reversal of the body axis, either in species or occasionally in individuals?

thanks for any suggestions!