Found in Devonian Rock in UK

[DaddyLongLegs]

IMG_3702.HEICStumbled across these fossils while out walking.  Still in situ. IMG_3702 about 12cms in diameter, IMG_3704 about 20 cms in diameter.  Area is Limestone and I think Devonian era.  Can anyone identify them?  Lots of ammonites in the area. Are they the mirror imprint of ammonites or are they some type of Cnidaria? 

IMG_3702.HEIC

[Rockwood]

Imprint, external mold, of an ammonite. 

[Ludwigia]

Our software doesn't manage HEIC images. Please repost with JPG.

[mighty micraster]

It wouldn't be devonian for an ammonite, I dont think I've ever heard of a uk devonian cephalopod being found?

I suspect it is jurrassic? 

[Rockwood]

31 minutes ago, mighty micraster said:

It wouldn't be devonian for an ammonite, I dont think I've ever heard of a uk devonian cephalopod being found?

I suspect it is jurrassic? 

I don't doubt this being so in this case. Ammonites were in existence during the Devonian, however. 

[Ludwigia]

Just to avoid any confusion here, "Ammonites"  is a layman's term for spiral cephalopods. The Orders Goniatida (Devonian), Ceratida (Triassic) and Ammonitida (Jurassic-Cretaceous) all belong to the Sub-Class Ammonoidea, but many people call them all Ammonites, although the more accepted terms are Ammonites for the Ammonitida, Ceratites for the Ceritida and Goniatites for the Goniatida.