Ordovician porifera, algae,...?

[mbarco]

A partial decalcified specimen from the Upper Ordovician. Scale bar: 5mm

The image on the left shows 2 views of one mould, the image on the right shows 2 views of the other mould.

Into the 2 moulds (expecially in the left one) you can see that the specimen has, almost sunk on its surface, a piece of ramose bryozoan (decalcified) and an echinoderm columnal (decalcified).

We don't know if it could be some sort of sponge or calcareous algae, or other...

[Megalodoodle]

Do you know the formation? I believe I might have something similar and I’d love to compare notes!

[mbarco]

It's Italy. But I  didn't tell anything about formation or place, in order to let anyone think an hypothesis. We found that Gondwana and Laurentia sometimes have something in common.

However, here I'm tryin' to understand the Phylum, not a species