Conulariid?

[Phidippus audax]

Please see image. 

Can anyone help ID?

Found in creek bed in St. Charles County, Missouri. 

[Tidgy's Dad]

Squashed Echinaria productid brachiopod, is what I'm seeing. 

[grandpa]

Not conularid. 

[FossilNerd]

I agree that this is not a conulariid. I’m not seeing evidence of 4 fold symmetry. 

[doushantuo]

JUST for the record: there are conulariids that exhibit multi-sided specimens(e.g. five sides,nine sides)

[doushantuo]

Agree with Adam,there's a resemblance to Echinaria semiplicata

[Phidippus audax]

Thank you all for the help with ID.  Much appreciated! 

[DPS Ammonite]

3 hours ago, doushantuo said:

Agree with Adam,there's a resemblance to Echinaria semiplicata

Did you mean Echinaria semipunctata? I could not find semiplicata.

 

https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=27333&is_real_user=1

 

Note sulcus (central furrow) and small spines typical of Echinaria sp.

 

https://www.kgs.ku.edu/Publications/ancient/f12_stroph.html

[doushantuo]

Yeah,think you're right on the money,bit of a gaffe there.

although,"bit"

Is fluorescent bright vermilion the right colour for a hominin face?

 

Edited May 21, 2023 by doushantuo

[Tidgy's Dad]

Yes, Echinaria semipunctata is a possible species id.