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Norellisoma should be ok. However, according to Fauna Europaea we have 6 species in Germany. I have no key except that by Stuart Ball (http://scathophag...agidae.pdf), who mentions three Norellisoma species, one of them not found in Germany. The remaining two differ in size, colour, and hairiness of the arista as well as in the habitat. The male 5th sternites and genitalia give important characters, but your male cannot be dissected :| (good for the fly, bad for science). I have no idea what the other species look like. So the pictures should better be labeled Norellisoma spec., even if the yellow colour speaks for N. spinimanum.
Regards, Sundew