Kalkberg: Sponge?

[Misha]

I just remembered this object that I found in the Kalkberg formation.

Upon first seeing it I thought it might be a concretion, but after washing it up my opinions have changed.

Now I can see many other fossils alongside it and after comparing to other Kalkberg fossils I believe it may be Hindia sphaeroidalis,

Is this ID accurate?

I appreciate any help.

[Rockwood]

The branch it's on begs an explanation.

[Rockwood]

3 minutes ago, Rockwood said:

The branch it's on begs an explanation.

I think I see. A sponge in (tree like)  bryozoan. 

 

[Misha]

1 hour ago, Rockwood said:

The branch it's on begs an explanation.

The branch is a bryozoan that has settled on top of the object in question

[Jeffrey P]

Looks like a Hindia to me. They are very abundant in the Kalkberg. 

[Misha]

7 minutes ago, Jeffrey P said:

Looks like a Hindia to me. They are very abundant in the Kalkberg. 

Surprisingly, this is the only one I found that day