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Thank you for the effort so far, Paul.

The acrosticals are definitely biserial which would indicate Rh. trilineata.
I also have the same misgivings as you do about the shape of the lamellae as a key character. The specific way the genital lamellae dry is bound to have an effect on how they look. I haven't had a look on the aedeagus yet, but will do so tomorrow. Time to perform a bit of surgery!
I'll post a picture if the operation is a success ;)

Best regards,