Found inside the stipe of a mushroom (not yet ID'd) growing on the base of a tree, two tiny specimens, the larger of which was c.10mm long. Pale millpedes with parallel dark patches down the "corners" of each segment, which under the microscope showed a small scaly protrusion to their rear. Photos not the best, being in between where the microscope is good and where a loupe is good, although I did forget I had on 15x eyepiece rather than 10x, which would have helped a lot. Microscope pics to follow.
Interestingly this species is sexually dimorphic, with the larger of the two specimens falling outwith the range for a male. Was this a pair?