Solnhofen Star Shaped Ichnofossil Found Next To Lumbricaria

[GeschWhat]

Hi all,

I came across this tiny star shaped ichnofossil while prepping Lumbricaria I recently received. It measures about 2 mm across. I know something like it was posted on the forum not that long ago, but I can't seem to find it. Do you think it's an ichnofossil or just a mineral deposit? I have included photos of the Lumbricaria as well, including some micros of what I think are partially digested pieces of brachial segments. As always, thanks for your help!

[marguy]

For the first picture, see Saccocoma pectinata, floating crinoid.

[GeschWhat]

Thanks you! That is what I was hoping! But I know so little about crinoids. It would make sense because (from everything I've read) the Lumbricaria often contains undigested pieces of those creatures. In addition, because of the size of the pile of coprolite, I am assuming the coprolite producer was some kind of ambush predator. .