What's this fossil?

[undergroundHP]

Hi all.
I am trying to identify this fossil.
My first impressions were it to be a fin of some kind. Or is it like a coral species ?
If anyone has a idea please could they let me know.
Thanks

 

[langcliffe]

Looks like a brachiopod.

 

[RobinGriffiths]

Could be side view of a rugose solitary coral.

 

[Ed]

Solitary ciral like the one top right in second picture

 

[carpet]

I'd agree with langcliffe that it looks like a chunk from a brachiopod of some kind. Seeing that kind of longitudinal segmentation on a solitary coral would be unusual I believe?

 

[georgenorth]

I'd agree with langcliffe that it looks like a chunk from a brachiopod of some kind. Seeing that kind of longitudinal segmentation on a solitary coral would be unusual I believe?

Im 99% confident that it’s a Rugose coral.
George (former Geology student).

 

[Andy Farrant]

Yup, definitely an oblique cross section through a solitary rugose coral.