After a recent search for marine plankton (which was a bit disappointing) I found this silverfish.
I learnt that there are 3 variants (literally from dutch) silverfish, paperfish and ovenfish. Got the impression this is the paper loving type. Not one of my favourite insects, however at second sight it turned out to be extravagant in its own way.  The specific details in shells and hairs made the use of oil immersion and differential interference contrast (dic) also relevant.