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Hi Ruud,
Just to fill me in (I don't know all the abbreviations yet):
[Given the 4 rows of ac] (is that anterior dorso-central seta(e)?), of which the inner ones are much longer than the other ones I think it is Lyciella rorida.
So mine is Lyciella rorida, because it has 2 sternopl. bristles and 4 rows of ac?