Psichrosoma cf breuili (Mauriès, 1970)
An unpigmented small millipede (about 10mm long) with well developed paranota and amoured with curved stout body setae. It could be confused with more widespread Brachychaeteuma melanops, which has less stout setae.
A brief description, with figures, is provided by Owen & Gregory (2021).
This appears to be a new species (Jörg Spelda, pers. comm.).