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I went on location David, has E. argoteles been recorded in Yorkshire?
No, only one site so far I think, Wicken Fen.
It must be slightly more widespread though. The foodplants aren't very restricted either.
This is 99.999...% going to be E. monodactyla.
Being a bit picky, but a lot of people are just identifying these on external appearance without dissecting them. And if we all do that we will never know if argoteles is more widespread.
Thanks Douglas, I was aware of E. argoteles and that it was first discovered at Wicken Fen in 05 but couldn't really find much more information so didn't even consider it an option here.
Maybe in a few years it will be quite common!? It wasn't even featured on the UK moths site.
You are quite right David, that did cross my mind how will we know if no one is dissecting them? I think it would be in the moths of a similar species best interest to develop a unique visible feature to save their genitals from the chop!
Colin Hart does suggest in British Plume Moths that there are some differences, but they are subtle.
In argoteles the dorsal half of the wings is slightly darker and the first lobe is darker towards to costal edge whereas in monodactyla the wing is usually even coloured. The orbicular spot is normally more prominent that in monodactyla. The first forewing lobe is usually straighter than in monodactyla. Usually with less dark spotted dusting than on monodactyla.
I suspect someone familiar with both species may be able to separate specimens on external characters (on a set specimen at least) although Hart does say that this is not always possible and dissection is needed on occasion.
Lat/Lng: 53.79163, -1.66001
OS grid ref: SE224328