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Roy, Apart from Ax I have difficulty in sorting out which veins are which despite Dijkstra/Lewington's best efforts.
Are there any clearer drawings/descriptions available?
I've had a bit of a search online, and couldn't find anything that clearly illustrates all veins.
You might find the illustrations in the key in "Les Libellules de France, Belgique et Luxembourg" by Daniel Grand & Jean-Pierre Boudot are clearer for you (the relevant veins/areas are highlighted in red at each stage in the key).
I'll see if I can post some observations with the veins highlighted over the winter - I need to try and find a way to clearly illustrate the more important veins for identification anyway, so it would be a useful exercise for me, and may prove helpful to others.
If you scroll down this page you will find the relevant cells for this species highlighted by blurring the rest of the wing:
Thank you so much Roy. You are being more than helpful.
Anything for veins similar to the Guillaume Doucet picture showing the difference between O forcipatus and O. uncatus would be wonderful. For example, the link you give above does just that for O. brunneum and O. coerulescens.
Having said that, I doubt that many such comparisons are that straightforward.
Lat/Lng: 42.5354, 2.8575