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Thomas.Dodson

I've had some difficulty narrowing down the identity on some assorted brachiopods. The diagnostic features may not be preserved but I figured I'd post them here to see if anyone knew. @Tidgy's Dad Any ideas?

 

The first is a single large valve from the Warsaw Formation in Fenton, Missouri (The old Meramec Bridge site). I've been able to track down most species reported from here and identify everything else but this one is harder. The wear doesn't help.

valv1.png.f39f0512dc964fc2112d4e7be48f3c4a.png

valv2.png.8ebcf72636e6f091589a5b1afb77558f.png

valv3.png.da4be99144f12dca1f292e3dae49f206.pngvalv4.png.829117f2b6712a323fbf659337262331.png

The second are a couple o  Echinoconchidae valve casts in chert from a creek in Lincoln County, Missouri. It could be residual chert. The area is otherwise Ordovician.

2.8 cm width x 2.5 cm height.

productid.png.511318f070f434273df2af8b7fd15f23.png

3.8 cm x 3.2 cm

valvv.png.b0bd242ccc23d909b0449670d85f1c5e.png

 

 

 

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Thomas.Dodson

Here's an up close of the cardinal process.

productid4.png.b4f6b1db53ccf93d32d3a6f742d1a1b9.png

This brachiopod is from glacial erratica in North Dakota. @Tidgy's Dad helped narrow it to Middle Devonian based on the identities of the other brachiopods found. I figured I'd post it here in case anyone else knew what it was. @FossilDAWG, you mentioned you had some experience with Middle Devonian fossils in Manitoba where this likely came from. Any ideas?

brach15.png.4319259038a5c1bf45d3c0e9e708b0a4.png

brach17.png.ab211c4f17d1b1a8379772aeb9d4a26b.png

brach16.png.43d635bb67a42a9d2e4d6369493ec3bf.png

brach18.png.4029c6cdbdf769e2b066e3b9a5268096.png

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Tidgy's Dad

The first one is screaming 'spiriferid' at me, but it might be Productus magnus, I'm really uncertain. Interesting.

The next one looks like Buxtonia. 

I'm going with Atryparia for the last one. 

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Thomas.Dodson
10 minutes ago, Tidgy's Dad said:

The first on is screaming 'spiriferid' at me, but it might be Productus magnus, I'm really uncertain. Interesting.

The next one looks like Buxtonia. 

I'm going with Atryparia for the last one. 

Productus magnus is quite common at the site and I collected several nice pedicle valves. Weller's "The Mississippian Brachiopoda of the Mississippi Valley Basin" was used to identify most of the brachiopods but there wasn't a brachial valve in the plates.

 

As always, thanks for the help!

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