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Tennessee Brachiopod: Anyone Collected There Familiar With This?

JUAN EMMANUEL

By JUAN EMMANUEL
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JUAN EMMANUEL Regular Member

JUAN EMMANUEL

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I bought this fossil from somewhere for a couple of bucks and it came from the mid-to late Ordovician of Tennessee. However it was labelled as "brachiopoda tennesseenensis" which didn't made sense for me. At first I thought it was a tetraphalerella neglecta but then I found out it was WAY too big for that species. It resembles a lot like a strophomenid, and I also believe that it does belong to that family. Are there any big strophomenid brachiopods out there from the Ordovician of Tennessee? I showed it to the ROM this Wednesday and they said brachs from Ordovician Tennessee grew bigger than the ones at Ontario because it was warmer there.

Also, if possible, could anyone share their insights as to what Ordovician formation this could've come from from Tennessee?

post-13300-0-41275000-1408759273_thumb.jpg

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Shamalama Regular Member

Shamalama

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Hmmm... Looks like an Orthotetes possibly? That is Mississippian in age though. The only large strophomenids that come from the Ordo of TN are Rafinisquina and Strophomena as far as I know. Yours seems to look like a Rafinisquina ponderosa: http://www.kyanageo.org/fossils/ordovician/brachiopod/O-303-Rafinisquina-ponderos.jpg

-Dave

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JUAN EMMANUEL Regular Member

JUAN EMMANUEL

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Thanks for the suggestion!! :) Haven't bothered thinking that R. ponderosa was a good possibility.

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JUAN EMMANUEL Regular Member

JUAN EMMANUEL

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But wait...If this is a R. ponderosa it would be a whopper because the hinge line is about 6.5 cm long. :blink: I've never seen a specimen grow beyond 4-5 cm.

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  • 3 weeks later...
JUAN EMMANUEL Regular Member

JUAN EMMANUEL

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Wait, I think this one came from the Leipers formation of Tennessee. The colouring of it looks similar to the colouring of the rock of the Leipers formation.

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erose Regular Member

erose

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There are a lot of look a likes between different formations and time periods. Good location info is critical. just an interesting rock otherwise.

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  • 4 weeks later...
Herb Regular Member

Herb

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If I remember correctly the Leipers F. is Ordovician, so I would say Rafinesquina ponderosa,

By my estimate the hinge is about 3", not an uncommon size around here.

Edited by Herb

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