Posted by Tony Irwin on 08-12-2021 15:55
#8
John - check the mid femora for small pv bristles. If they're absent, I would say this is
Hydrellia maura (though the genitalia are hardly like
flavicornis). Don't worry too much about the low lunule - normally it would appear to be much higher, but it does vary a bit.
H. maura is known to mine
Potamogeton. If you are still concerned, I'd be happy to have a look at the male for you.
Sorry - wrote this before seeing the genitalia pics. Will look at them closely now.
Edited by Tony Irwin on 08-12-2021 16:02