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The Lowly Oyster aka Ram's Horns (Texas Cretaceous)


JamieLynn

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Texas has SO many of these little fossils, but I love them and can't help but pick them up.  Behold a plethora of Illymatogyra arietinas.  (I got a new lighting set up and I am LOVING the way the photos are coming out!)

Size (1/2 - 1 3/4 inches)

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I like them too. They're almost as snail but they're a bivalve.

What kind of lighting setup do you have?

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17 minutes ago, Wrangellian said:

I like them too. They're almost as snail but they're a bivalve.

What kind of lighting setup do you have?

 

Yes, when I first found them I thought they were gastropods, but soon learned that they are actually bivalves! 

I got one of those ring lights that people use for online video making. It's been great for photographing fossils! 

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One of my favorites to photograph too, Jamie.  Good work!  :fistbump:

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The human mind has the ability to believe anything is true.  -  JJ

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They may be a dime-a-dozen where you live, but the rest of us are not so lucky. I think they are wonderful even if common.
 

Great fossils and great photography! :thumbsu:

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The good thing about science is that it's true whether or not you believe in it.  -Neil deGrasse Tyson

 

Everyone you will ever meet knows something you don't. -Bill Nye (The Science Guy)

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1 minute ago, FossilNerd said:

They may be a dime-a-dozen where you live, but the rest of us are not so lucky. I think they are wonderful even if common.
 

Great fossils and great photography! :thumbsu:

Thank you! 

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Excellent photography. Some of the most common fossils are the most irresistible. With the color variety in those you might eventually make a rainbow.

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I would be tempted to assemble a ricker case of those bivalves filled with a variety of colors, almost like a lot of us midwesterners do with native artifacts.

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Have you found the less common ones with both shells and shells that show the original striped color pattern?

My goal is to leave no stone or fossil unturned.   

See my Arizona Paleontology Guide    link  The best single resource for Arizona paleontology anywhere.       

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7 minutes ago, DPS Ammonite said:

Have you found the less common ones with both shells and shells that show the original striped color pattern?

 Some of these do have the second valve....a tiny smaller curl!  I have not found any with the color pattern, I don't think. I have found Exogyra tigrina which are cool and have that striped pattern. I would like to see a picture of what you are referring to! 

 

 

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Beautiful. :b_love1:

Really great photos. 

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Life's Good!

Tortoise Friend.

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  • 2 years later...

I've got two. Nice little critters they are!

 

Correct me if I'm wrong, but is this species one of the reef building bivalves that made up most of the reefs around Appalachia during the Cretaceous?

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34 minutes ago, JamieLynn said:

@Fullux - you are probably thinking of rudists.  They are a varied variety of bivalves that were reef builders. 

Ah, yes, that's right.

 

What I am curious to know is what role Ilymatogyra played in its environment and why it had such an odd shaped valve.

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Since they are oysters, they would have done the same role as oysters today...filtering the water. There are a variety of oysters from the Cretaceous that have the same 'curled" element. Exogyra tigrena and laeviscula to name a few.

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Love your photos!  I wouldnt walk past any of these fossils either.

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"There is no shortage of fossils. There is only a shortage of paleontologists to study them." - Larry Martin

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14 hours ago, JamieLynn said:

Since they are oysters, they would have done the same role as oysters today...filtering the water. There are a variety of oysters from the Cretaceous that have the same 'curled" element. Exogyra tigrena and laeviscula to name a few.

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Very nice, JL... Are we looking at something like original color patterns here?

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On 1/18/2024 at 6:38 AM, JamieLynn said:

@Wrangellian  that is what i have been told.  They are a variety of "colors" ranging from reddish brown to gold to black and all have that stripey pattern. 

There was a topic about original colors/patters in fossils...

this might be the one I was thinking of unless there was a more extensive one that I can't find right now... Might be worth adding that Exogyra to the topic.  :headscratch:

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On 1/17/2024 at 3:51 PM, JamieLynn said:

Since they are oysters, they would have done the same role as oysters today...filtering the water. There are a variety of oysters from the Cretaceous that have the same 'curled" element. Exogyra tigrena and laeviscula to name a few.

 

Yes, the whole family Gryphaeidae from the Early Jurassic to the end Cretaceous are like this.

I used to love finding Liassic specimens of Gryphaea 'The Devil's Toe Nails' on the beaches of Lyme Regis, Charmouth and the North Somerset coast near my birthplace.

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Life's Good!

Tortoise Friend.

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