@vperez, weird! It looks like a completely different fossil from the ventral side (the 3rd image, no.3756, is the ventral side, right?). I’m thinking it’s broken and tumbled, so not the whole fossil. Doesn’t look like a shark tooth, too wide and too many bumps that aren’t sharp…I don’t think it’s a tooth from something else either. Hmmm. I am stumped.