Ontario trilobite - Ceraurus sp? + bryozoan

[Wrangellian]

This one came to me without any information. My best guess is some kind of Ceraurus, from a Trenton Group (Simcoe Gp?) formation in Ontario. Can anyone fill in any more detail than that for me? I know it's rough and maybe not enough features to identify it. Is the bryozoan identifiable? Is the rock distinctive enough to say which formation it might be from?

I'll get better pics later if needed.

 

Edited August 23 by Wrangellian

[Wrangellian]

This may be a better pic, for the bryozoan at least:

 

 

 

Broken section of the bryo:

 

 

A shot of the back just to see the type of rock:

[Northern Sharks]

If it's from Ontario, It could be Bobcaygeon, Verulam or Lindsay formation and depending which one, it could be one of several cheirurid trilobites, Ceraurus included. The bryozoan is a Prasopora sp. which is most common in the Verulam but I think can be found in all 3 formations. Best guess is Ceraurus globulobatus based on that alone, but a lot of the distinguishing features are missing.

[Wrangellian]

9 hours ago, Northern Sharks said:

If it's from Ontario, It could be Bobcaygeon, Verulam or Lindsay formation and depending which one, it could be one of several cheirurid trilobites, Ceraurus included. The bryozoan is a Prasopora sp. which is most common in the Verulam but I think can be found in all 3 formations. Best guess is Ceraurus globulobatus based on that alone, but a lot of the distinguishing features are missing.

Thanks, that helps a bit. It is certainly from Ontario and probably from a site that was known to everybody as of 20+ years ago - the collector would have gotten directions from a rockhound guidebook or maybe thru a rock club as she was probably a member of one over there.