Is This A Bunch Of Slugs Like They Look Or Horsetail Whorles?

[Salvageon]

I was into a bunch of Horsetail Calamites today and kept finding these what look like slugs. I can't imagine slugs fossilize well but they have the little antenna and everything. My guess is Horsetail whorl leaves or whatever they're called. They are about 1/2 inch long. Input would be appreciated. Good thing they're dead or my wife would not be pleased.

[Rockwood]

It's extremely unlikely that slugs would fossilize this way. They don't look like typical leaf fossils either. Perhaps a shot of the Horsetail, Equisetum ( Hell Creek is too young for Calamites ), to get an idea of what the preservation looks like might help.

[Salvageon]

Here are more pics. Notice the thin reed has sections and some of the "things". The dig site was steep and several thin layers and a thick hard one where the big reeds were. The reed with the ruler is a nice rounded piece with fine sections. I dug several places at the same layer and the "slugs" were everywhere.

[Auspex]

I make them to be individual leaflets or bracts.