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Well, a detailed view of ventral inner margin of gonocoxites (base and apical end) would be interesting: there should be a group of more prominent setae. The excavation of apical fourth/third of stylus supports Zygoneura. And there are some more species described by Mamaev and Mohrig exclusively from Russia.....
Let's wait what Black will report (Hopefully it is on one slide/in one vial)....

so long,
xylo