Possible Terataspis piece?

[Nautiloid]

Hello all!

 

So I’ve been messing around with my collection lately and I came across this piece. It’s from the Onondaga Limestone, probably from Onondaga County. I was wondering if there’s any chance it’s a weathered piece of a Terataspis Grandis? Or if it’s something else entirely. 
 

Thanks for the help!

Owen

[Fossildude19]

@Kane

[Kane]

It seems very probable, but some abrasion would say for certain. Despite the appearance of tubercles, there are some non-trilobite "mimics" in the material. 

[Nautiloid]

40 minutes ago, Kane said:

It seems very probable, but some abrasion would say for certain. Despite the appearance of tubercles, there are some non-trilobite "mimics" in the material. 

@Kane Thanks for the help! Maybe at some point I can get it prepped so I can know for sure. 

[Jeffrey P]

To me that looks more like the spiny gastropod, Spiniplatyceras dumosum which is also found in the Onondaga. However removing more matrix is the only way we'll know for sure. 

[Kane]

Showing a picture of the sides may also be helpful. Terataspis is a fairly robust trilobite, and even fragments tend to show a line in the rock. The shell is also typically fairly thick (up to a few millimetres). Any fractures on the edge would likely be black or deep brown. 

 

The other possibility is coral (I have seen some very good mimics among the corals in my equivalent strata). 

[Malcolmt]

Could be terataspis (and I've seen a few pieces) as it is found in that strata or could be coral. Only a bit of air abrasion will tell for sure.