I would like to know whether this specimen in a Mazon Creek nodule is the polychaete worm Esconites zelus (incomplete, distal part of the body - as suggested by the "tail-like" structure at one end) or a millipede (or something else)? (I also considered Acanthotelson, but there are too many segments in my specimen). The legs are comparatively long, but badly preserved (and only on one side of the specimen). I know this specimen is no beauty.
The total length of the fossil is 20 mm, the width (without legs) about 2,5 mm. Picture 4 shows the counterpart (without legs).
Thanks,
araucaria1959