Jump to content

fifbrindacier

Recommended Posts

Hi, a friend of mine told me he found some Placentyceras in a place where the geologic ages go from the Albian to the Turonian-Santonian, but most of the stratas of that place are Cenomanian.

I believe this fossil is not an ammonite, but rather an Oyster or a rudist. I mostly think about Requienia or Toucasia. The geologic file mention the name of Toncasia bayleia.

Do you know if Toncasia is a synonym of Toucasia and do you think i'm right thinking this is a rudist ?

Lenght : 7 centimeters.

IMG_3966.thumb.JPG.a8e85c98b186cc95d059f30d3498bbe2.JPGIMG_3963.thumb.JPG.003409b31756b9a0d25d7a0af08936a6.JPG

theme-celtique.png.bbc4d5765974b5daba0607d157eecfed.png.7c09081f292875c94595c562a862958c.png

"On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry)

"We only well see with the heart, the essential is invisible for the eyes."

 

In memory of Doren

photo-thumb-12286.jpg.878620deab804c0e4e53f3eab4625b4c.jpg

Link to comment
Share on other sites

Is there a reason to discount the possibility of being an oyster, such as Gryphaea or Exogyra

The ridges look a bit more 3 dimensional than the images I see of the other options. 

  • I found this Informative 1

    Tim    VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM APRIL - 2015  

__________________________________________________
"In every walk with nature one receives far more than he seeks."
John Muir ~ ~ ~ ~   ><))))( *>  About Me      

Link to comment
Share on other sites

You're right, i've mentioned this possibility in the tags but not in the post, i've edited it.

  • I found this Informative 1

theme-celtique.png.bbc4d5765974b5daba0607d157eecfed.png.7c09081f292875c94595c562a862958c.png

"On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry)

"We only well see with the heart, the essential is invisible for the eyes."

 

In memory of Doren

photo-thumb-12286.jpg.878620deab804c0e4e53f3eab4625b4c.jpg

Link to comment
Share on other sites

Oops! I always forget to look there! :blush:

  • I found this Informative 1

    Tim    VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM APRIL - 2015  

__________________________________________________
"In every walk with nature one receives far more than he seeks."
John Muir ~ ~ ~ ~   ><))))( *>  About Me      

Link to comment
Share on other sites

I cannot see in the pictures where they show if this is an oyster or a rudist that is more like a gastropod. If it is an oyster you should be able to see where the two shells meet or you should be able to see the concave interior of a single shell.

 

If it is a rudist, you should be able to see a small opening with a deeply invaginated interior similar to a snail. You might also see a small shell covering the opening.

 

Please show us the other side (back side) of this:

 

38272164-BAD5-4223-AD53-DDFA0DC253E0.jpeg

 

@fifbrindacier Are you able to see and send us a clear photo of where two shells meet if this is an oyster or of the small opening if this is a rudist?

 

What does our rudist expert think? @FranzBernhard

  • I found this Informative 1

My goal is to leave no stone or fossil unturned.   

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

Link to comment
Share on other sites

Thanks, @DPS Ammonite, but I am not an expert.

 

Googling for Toucasia yields some examples, also this one:

http://le-coin-a-fossiles.fr/barremien.html

 

2 hours ago, fifbrindacier said:

Do you know if Toncasia is a synonym of Toucasia

Its just a typical misreading, n for u.

 

Tried googling for -- toucasia bayleia --, but without quotation marks. Yields an old work, bayleia seems to be the name of a genus or subgenus - ? Oh yes, its a genus within the family Requieniidae.

 

But, sorry, I don´t know what your specimen is :o.

 

Franz Bernhard

  • I found this Informative 1
Link to comment
Share on other sites

21 hours ago, caterpillar said:

Take a look at Amphidonte

I did, and i agree this fits well. I should have listen to my first impression it was an Oyster. Thank you Caterpillar.

theme-celtique.png.bbc4d5765974b5daba0607d157eecfed.png.7c09081f292875c94595c562a862958c.png

"On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry)

"We only well see with the heart, the essential is invisible for the eyes."

 

In memory of Doren

photo-thumb-12286.jpg.878620deab804c0e4e53f3eab4625b4c.jpg

Link to comment
Share on other sites

Thank you @doushantuo

theme-celtique.png.bbc4d5765974b5daba0607d157eecfed.png.7c09081f292875c94595c562a862958c.png

"On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry)

"We only well see with the heart, the essential is invisible for the eyes."

 

In memory of Doren

photo-thumb-12286.jpg.878620deab804c0e4e53f3eab4625b4c.jpg

Link to comment
Share on other sites

12 minutes ago, doushantuo said:

polli1.jpg

What paper is this from, Ben? 

    Tim    VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM APRIL - 2015  

__________________________________________________
"In every walk with nature one receives far more than he seeks."
John Muir ~ ~ ~ ~   ><))))( *>  About Me      

Link to comment
Share on other sites

Not entirely sure,but it MIGHT be from Klaus Bandel,around 1993 ,in the Mitteilungen des Geologisches-Palaontologisches Instituts/Univ.Hamburg

  • I found this Informative 1

 

 

 

Link to comment
Share on other sites

2 hours ago, doushantuo said:

Not entirely sure,but it MIGHT be from Klaus Bandel,around 1993 ,in the Mitteilungen des Geologisches-Palaontologisches Instituts/Univ.Hamburg

 

 

MIGHT be or it is not? ...why all the intrigue?  LINK

 

The paper is actually by:

 

Mohammad Aqrabawi Amman 1993

Oysters (Bivalvia-Pteriomorphia) of the Upper Cretaceous rocks of Jordan. Palaeontology, Stratigraphy and Comparison with the Upper Cretaceous oysters of Northwest Europe.

Mitteilungen aus dem Mineralogisch-Geologischen Institut in Hamburg, 75:1-135

image.png.a84de26dad44fb03836a743755df237c.png

Link to comment
Share on other sites

40 minutes ago, will stevenson said:

Definitely exogyra I have one myself:)

 

2 hours ago, piranha said:

 

 

MIGHT be or it is not? ...why all the intrigue?  LINK

 

The paper is actually by:

 

Mohammad Aqrabawi Amman 1993

Oysters (Bivalvia-Pteriomorphia) of the Upper Cretaceous rocks of Jordan. Palaeontology, Stratigraphy and Comparison with the Upper Cretaceous oysters of Northwest Europe.

Mitteilungen aus dem Mineralogisch-Geologischen Institut in Hamburg, 75:1-135

Thank you all !:)

theme-celtique.png.bbc4d5765974b5daba0607d157eecfed.png.7c09081f292875c94595c562a862958c.png

"On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry)

"We only well see with the heart, the essential is invisible for the eyes."

 

In memory of Doren

photo-thumb-12286.jpg.878620deab804c0e4e53f3eab4625b4c.jpg

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...