No Geological Information

[Lucid_Bot]

Hi, I don't have any information on this specimen since I believe the rock that I found it in is foreign to the area I discovered it. Although I think the rock is from somewhere around the Western Pennsylvania/Eastern Ohio area. It is approximately 2.6 cm by 2 cm. Just hoping someone has some idea what it is. Thanks again.

[Ludwigia]

Looks like a cast of a bivalve shell.

[Misha]

I'd have to disagree with @Ludwigia, I think this looks more like a productid brachiopod valve, it's partially exposed giving it the asymmetrical appearance of a bivalve.

Maybe something like Echinaria sp.? Although I am not great at identifying productids.

 

@Tidgy's Dad may be able to tell

[ClearLake]

I'm with @Misha, it looks like a productid brachiopod to me.  I'm thinking something like Cancrinella with those coarse rugae and what looks like a bit of an ear exposed at the edge near the hingeline.  But I'm assuming it is Pennsylvanian and that could be wrong of course.

[TqB]

One more for productid brachiopod. My first thought was something like Echinoconchus.

[DPS Ammonite]

1 hour ago, TqB said:

One more for productid brachiopod. My first thought was something like Echinoconchus.

Echinaria and Echinoconchus may be at least partial synonyms.

 

See synonymy in:

 

Brew, D. C., & Beus, S. S. (1976). A Middle Pennsylvanian Fauna from the Naco Formation near Kohl Ranch, Central Arizona. Journal of Paleontology, 50(5), 888–906. http://www.jstor.org/stable/1303586

 

 

Edited November 17, 2022 by DPS Ammonite

[cngodles]

Another vote for Echinaria. Scale bar 1 cm.

 

 

Edited November 17, 2022 by cngodles

[Tidgy's Dad]

Yes, definitely a productid, though I wouldn't like to guess which one without a location. 

Quite a few possible candidates.