Vinlandostrophia laticosta?

[glyph250]

Hi guys, new to fossil hunting so I thought I'd ask for some help identifying a few fossils my girlfriend and I found at a park near Louisville, Kentucky. We found a ton of brachiopods among the creek gravel, almost completely without context, but this was the only one intact and in decent condition. Is this what I think it is, a Vinlandostrophia laticosta? According to this resource we're only about 30 miles or so out of its documented range.

 

http://www.ordovicianatlas.org/atlas/brachiopoda/rhynchonellata/orthida/platystrophiidae/vinlandostrophia/vinlandostrophia-laticosta/

 

Thanks!

[doushantuo]

Not a brachiopod genius,but a platystrophiid in any case.-->>Vinlandostrophia might be revised,BTW

-->>edit:will let this one stand.

As Al Gore once said: I stand by my misakes.

 

Need I post this?

 

 

linktomcewan

(about 6,2 Mb)Quoted above,BTW

 

 

 

 

 

 

 

 

 

 

 

 

[Tidgy's Dad]

This is Vinlandostrophia laticosta.

I don't think it's a good match with yours. 

I think it's a Platystrophia, but not sure of the species. 

 

[glyph250]

Thanks for the response, @doushantuo and @Tidgy's Dad.  From looking at the specimens TD showed, I have to agree.  Mine looks significantly more rounded than square, with a more pronounced hinge. Are those the differences you see, TD? I'm very new to this and don't understand what to look for yet.

[Tidgy's Dad]

Most brachiopods are officially classified based on internal characteristics, but obviously this is not usually possible with complete specimens, so yes, you are right, we have to study external shell morphology; shape, size, the pedicle area, number of ribs, the sulcus and keel where present, a comparison with known brachiopods from the strata etc. 

I'm not familiar with this area, but the general shell morphology here seems to fit Platystrophia better, but there may be other genera similar found here.

Maybe someone more familiar with this region will chime in. 

[Peat Burns]

These can be "fun" to identify.  Yours probably has the extremities broken off.  Some common  candidates with which to compare include Platystrophia ("Vinlandostrophia") acutilirata, P. cypha, and P. clarksvillensis.

[Tidgy's Dad]

13 minutes ago, Peat Burns said:

These can be "fun" to identify.  Yours probably has the extremities broken off.  Some common  candidates with which to compare include Platystrophia ("Vinlandostrophia") acutilirata, P. cypha, and P. clarksvillensis.

And, as if by magic, Tony appears! 

[Peat Burns]

17 hours ago, Tidgy's Dad said:

And, as if by magic, Tony appears! 

I had been silently watching but didn't want to stick my neck out.  I struggle with the Platystrophia.  I have to sit down with my books and papers and spend time on these in hand 

[Tidgy's Dad]

2 hours ago, Peat Burns said:

I had been silently watching but didn't want to stick my neck out.  I struggle with the Platystrophia.  I have to sit down with my books and papers and spend time on these in hand 

I struggle with Platystrophia too. 

The blinking thing still hasn't arrived! 

[Peat Burns]

5 hours ago, Tidgy's Dad said:

I struggle with Platystrophia too. 

The blinking thing still hasn't arrived! 

Ugh.