Cauchas rufifrontella (Treitschke, 1833)
As testified by pictures by Rudolf Bryner on Lepiforum, 2019 the young larvae live in the fruits. Late they live in a case, made out of detritus, in the litter.
Contrary to the above, Triberti ao state that he young stages live on Valeriana officinalis.
distribution within Europe
Kurz (2016a), Triberti, Longo Turri, Adami & Zanetti (2017a).