I would like to trade Trachydomia spp. snails for any legally-collected rough or trace/track fossils, from any era, any location.
Here are updated images of what I have left of Trachydomia spp.. The first three in the front have been lightly coated with a clear acrylic (?).
The other image is of Desmostylia tooth fragments (Langhian Miocene) from Sharktooth Hill, near Bakersfield, CA. These were obtained at a local rock and mineral show several years ago. I tried to get these to fit together to make a complete specimen. The only one I could do that with is the third one in the first row.