No interactions present.
Clearly Setina, but your locality seems to be within the likely range for Setina (ramosa) alpestris and S. (ramosa) pfisteri as well as S. irrorella. Leraut's Moths of Europe Volume 1 shows several alpestris and pfisteri that are close to yours and his distinguishing characters seem to relate to the underside. (I think the synonymisation of these species with S. ramosa is Leraut's work.
Did you have the opportunity to exclude these other species?
Unfortunately I was not able to get pictures of the underside.
I was not able to exclude the other possibilities.
Should we call it Setina sp.?
Thank you for your help with the various identifications.
I do not have access to the literature other than by Internet where I am at present.
It's a pleasure. It's exciting to try to understand and visualise the variation in lepidopteran communities across Europe and beyond.
Leraut's three volumes so far form a nice and compact guide to many families across Europe - not the Noctuidae/Erebidae, but most other macrolepidoptera. Depending on how much time you plan to spend in areas like Switzerland, they may be useful. The cheapest source seems to be publisher at http://www.napeditions.com/ouvragesuk.php.
Lat/Lng: 46.240863333333, 8.005585