I was looking through a bunch of Thylacocrinus stem pieces looking for interesting encrusters for tradebait, and ran across something I didn't notice before. These photos are of 2 different stem pieces:
My first thought was Constellaria, but (to my knowledge) that only occurs in the Ordovician, and is much larger. These are Middle Devonian (Kashong Fm.), and the whole image is less than 1 cm across, probably around 6 mm (I didn't have a measure handy).
Anyone have any thoughts?