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Maybe a little exaggerated (mostly the setae is standing nicely in a ad and pd position)
But sometimes they have a little differents.
I just mean to say, it is not always precise 90 degree.
There is some variation to it.
When i look at the chaetotaxy from 5 the same species, the chaetotaxy can be a bit different each species. But mostly the numbers of hairs are the same (for instance 1av+2ad+1pd+7pv)
Sometimes the av is close to the ad and sometimes they are far apart and you almost think the av it is a pv....:D
Nice hobby we have....:o:D:D:D

Joke