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Help ID Ammonites from Mexico


gerardo gonzalez

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Friends, I seek help to classify them, I have acquired them over the years without any reference. What I have been able to investigate is that they are from the Kimmeridgiano-Portlandian, probably from the formation "cañon of las lajas" (San Luis Potosí, Mexico) .I look for your name and surname.

 

 

 

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They are beautiful Ammonites. I cannot help with identification, though I am very interested... I'm sure someone will have some thoughts.

 

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The first two specimens look like Ochetoceras, maybe O. mexicanum.

I'm sure this older topic may help a little. See discussion there.

 

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Hi, those ammonites are probably from the kimmeridgian-thitonian Taman formation, from the southern part of the Mexican state of San Luis Potosí.

 The first two are Ochetoceras probably O.zio

 

I have no clue what the ammonite in the second picture is, @Ludwigia could help.

 

The three ammonites from the third picture are closely related to Ochetoceras.

 

I have no idea what The ammonite in the fourth pic is.

 

I have a specimen similar to the last one, but I have no clue to what it is.

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"Without fossils, no one would have ever dreamed that there were successive epochs in the formation of the earth" - Georges Cuvier

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The Mexican fauna needs to be studied more. It’s a shame that Mexico’s paleontology isn’t being studied. There are only a handful of resources for researching ammonites from Mexico. 

 

"Without fossils, no one would have ever dreamed that there were successive epochs in the formation of the earth" - Georges Cuvier

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  • 1 month later...

Thank you very much to all those who contributed their comments and suggestions, now I have managed to get closer to their classification.

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5 minutes ago, gerardo gonzalez said:

Thank you very much to all those who contributed their comments and suggestions, now I have managed to get closer to their classification.

Very nice to see some specimens from Mexico. 

They're very interesting. :)

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4 hours ago, gerardo gonzalez said:

Greetings to Morocco, any chance of swapping brachiopods from your country?

It is is illegal to export fossils out of Mexico.

It is better to keep your mouth closed and let people think you are a fool than to open it and remove all doubt

 

-Mark Twain

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I'm not selling, much less exporting, I'm looking for help to classify my fossil corals.

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@Thecosmilia Trichitoma

 

It is not only forbidden to bring fossils out of the country, it is even prohibided to collect them without having a written permit from the INAH (National History and Anthopology Institute, a Federal Institution). Those permits obtain almost only Mexican Academics that submit a research project to the INAH. I guess it neither promotes sciences much nor it inhibits "illegal" collecting. The country is large and not densely populated. I never met a INAH person at a fossil site protecting it.

 

But, BTW, in Italy, it is almost the same. This is still a law from Mussolini times. No comment.

 

So you may understand why some countries are well represented here, and others not.

 

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2 hours ago, gerardo gonzalez said:

I'm not selling, much less exporting, I'm looking for help to classify my fossil corals.

Please keep the discourse civil. :) 

The member is a child, and was likely referencing the mention of trading.  

 

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