A worm with an attitude!

This, perhaps, is a structural geologist's worst nightmare -- a fossil with a directional indicator. Now it LOOKS like a flatworm. Worms don't normally leave fossils, since they have no skeletal parts that can fossilize, but this is a rare exception. It may not have been a flat worm when it started, but being buried in a rock layer by very heavy strata would make anyone very flat.
Anyway -- this is from my USA days, but can't remember where.