I recently purchased the object below, and am curious to know if anyone can help identify it. The seller themselves has provided very little insight, though I'm trying to see if they can give more details. I'm not overly concerned about what it is, though it would be nice if the seller's information is accurate.
The seller claims this is from South Australia and they believe it to be an archaeocyatha from the Cambrian period.
Typical archeocyatha fossils I've seen show the 'cup within a cup', which may be what is visible to the right of the main feature? I don't know if the feather-like structure is one of these organisms on its side, or something else entirely.
This photo is the only one I have- I have not yet received the item, but can post more photos when I do.
Thank you for any help in identifying this.