Atheta malleus

This came to light and to identify it, once I'd reckoned it was Aleocharinae, I went straight for the genitalia. The apical sternite (at least I think that's what it was) and the parameres (again, I think that's what they are?) also looked quite distinctive but it was the aedeagus shown in the last photo below that clinched it for me.

male Atheta nigra showing tergites, apical sternites (last two and last one) and genitalia (two views with and one without parameres?), Wendling Beck Environment Project (Norfolk, UK), 15th August 2025