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Megalograptus at last?


MarcusFossils

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Hello all :)

I'm out at my hunting spot as I write this, and have found something quite exciting.

This location isn't know for any particularly large fossils, except I seem to have found something quite big. And the only big fossils around here are of Megalograptus:

http://www.mpe-fossiles.org/resources/Chartier_et_al-_2002.pdf

1) post-15490-0-84603000-1469285992_thumb.jpeg

2) post-15490-0-06282400-1469286076_thumb.jpeg

Any help in this ID would be much apprecieted!

Website: https://www.instagram.com/paleo_archives/

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“It is by no means an irrational fancy that, in a future existence, we shall look upon what we think our present existence, as a dream.”

Edgar Allan Poe

 

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The fossil is approximately 12cm long and 8cm wide, and has a granular surface texture (like a trilobite carapace).

One more photo:post-15490-0-12427100-1469286233_thumb.jpeg

Website: https://www.instagram.com/paleo_archives/

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“It is by no means an irrational fancy that, in a future existence, we shall look upon what we think our present existence, as a dream.”

Edgar Allan Poe

 

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I do not see it. It's possible the details aren't showing up in the image. Another possibility is that I'm just blind ....lol Some times we do not see what's staring us right in the face. You have any images of the item dry?

...I'm back.

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I do not see it. It's possible the details aren't showing up in the image. Another possibility is that I'm just blind ....lol Some times we do not see what's staring us right in the face. You have any images of the item dry?

Keep in mind the fact that megalograptus was 4ft long.

The fossil would only be a small section of some part of it's body.

I'll try taking a better picture :)

Website: https://www.instagram.com/paleo_archives/

---------------------------------------------------------------------------

“It is by no means an irrational fancy that, in a future existence, we shall look upon what we think our present existence, as a dream.”

Edgar Allan Poe

 

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I suppose it could be a segment of a cephalopod...but I doubt it

Voila: post-15490-0-41456700-1469287540_thumb.jpeg

Website: https://www.instagram.com/paleo_archives/

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“It is by no means an irrational fancy that, in a future existence, we shall look upon what we think our present existence, as a dream.”

Edgar Allan Poe

 

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I'm not seeing anything that resembles any part of a sea scorpion anatomy. It looks like a flattened portion of a large straight-shelled nautiloid to me.

Don

  • I found this Informative 2
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I'm not seeing anything that resembles any part of a sea scorpion anatomy. It looks like a flattened portion of a large straight-shelled nautiloid to me.

Don

I agree - a good find though and apparently a rarity from there. :)

  • I found this Informative 1

Tarquin      image.png.b7b2dcb2ffdfe5c07423473150a7ac94.png  image.png.4828a96949a85749ee3c434f73975378.png  image.png.6354171cc9e762c1cfd2bf647445c36f.png  image.png.06d7471ec1c14daf7e161f6f50d5d717.png

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I'm not used to finding any cephalopods other than Geisonoceras and whatever this ubiquitous like guy is:

post-15490-0-33119300-1469289497_thumb.jpeg

Website: https://www.instagram.com/paleo_archives/

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“It is by no means an irrational fancy that, in a future existence, we shall look upon what we think our present existence, as a dream.”

Edgar Allan Poe

 

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Keep in mind the fact that megalograptus was 4ft long.

The fossil would only be a small section of some part of it's body.

I'll try taking a better picture :)

They are also not 4 ft. long when born/hatched? I'm sure not everything we find in this world is adult yet.

Dorensigbadges.JPG       

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One of the better finds of the day:

Rafinesquina sp. (correct me if I'm wrong): post-15490-0-10075300-1469299761_thumb.jpeg

Website: https://www.instagram.com/paleo_archives/

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“It is by no means an irrational fancy that, in a future existence, we shall look upon what we think our present existence, as a dream.”

Edgar Allan Poe

 

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One of the better finds of the day:

Rafinesquina sp. (correct me if I'm wrong): attachicon.gifimage.jpeg

Woah! That's beautiful!

  • I found this Informative 1

Info: Craig Hyatt, retired software/electrical engineer

Experience: Beginner, fossil hunting less than a year

Location: Eagle Pass, TX USA on the border with Mexico, hot dry desert

Formation: Escondido, Marine, Upper Cretaceous

Materials: Sandstone, Mudstone, Shale, Chert, Chalk

Typical: Thalassinoides, Sphenodiscus, Exogyra, Inoceramus

Reference: http://txfossils.com/Txfossils.html

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To me that appears like a piece of a pretty large nautiloid. Nice brachiopod too. Congrats.

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For future reference, does anyone have any papers describing what actual Megalograptus material would look like?

Edited by MarcusFossils

Website: https://www.instagram.com/paleo_archives/

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“It is by no means an irrational fancy that, in a future existence, we shall look upon what we think our present existence, as a dream.”

Edgar Allan Poe

 

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On 7/24/2016 at 5:37 AM, MarcusFossils said:

For future reference, does anyone have any papers describing what actual Megalograptus material would look like?

 

 

This paper has 10 photo plates with multiple figures of Megalograptus:

Caster, K.E., & Kjellesvig-Waering, E.N. (1964)
Upper Ordovician eurypterids of Ohio.
Palaeontographica Americana, 32:301-358
 
 
 
 
  • I found this Informative 1

image.png.a84de26dad44fb03836a743755df237c.png

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This paper has 10 photo plates with multiple figures of Megalograptus:

Caster, K.E., & Kjellesvig-Waering, E.N. (1964)
Upper Ordovician eurypterids of Ohio.
Palaeontographica Americana, 32:301-358

Thanks for the papaer :)

I was browsing through the plates, and really did find that the fossil I have looks like it could be a section of the metasoma...the size is right, the granular surface is unlike a cephalopod and look like the surface of the meatsoma pictured in the plates..should I bother to upload more photographs with a proper camera or are we ceratin this is just a cephalopod segment?

post-15490-0-27115200-1469460894_thumb.png post-15490-0-08112600-1469460901_thumb.png

Edited by MarcusFossils

Website: https://www.instagram.com/paleo_archives/

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“It is by no means an irrational fancy that, in a future existence, we shall look upon what we think our present existence, as a dream.”

Edgar Allan Poe

 

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Eurypterids banded together,so on ethological grounds (yes,it's circumstantial,I know).i tend to think you have somethin there

Based on the pictures though? (And thank you for your paper as well ;) )

Website: https://www.instagram.com/paleo_archives/

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“It is by no means an irrational fancy that, in a future existence, we shall look upon what we think our present existence, as a dream.”

Edgar Allan Poe

 

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Don't know enough about integument taphonomy and structure to comment.Am trying to remedy that ,BTW .

tough going,Z.Scr 1978 still paywalled B)

Edited by doushantuo

 

 

 

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Hint: Google "Selden,babes,woods"

That way i don't have to post one of those ridiculously long S**in**r links

It will get you selden/Lamsdell,i hope

or:

https://www.google.nl/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0ahUKEwjy8fGg_Y7OAhWHXhQKHXIcAUUQFgg4MAI&url=https%3A%2F%2Fkuscholarworks.ku.edu%2Fhandle%2F1808%2F11544&usg=AFQjCNEDybAbgYdbp8tVUIb7la5hLV3Peg

Edited by doushantuo

 

 

 

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My specimen actaully looks very similar to Exoclitendoceras rochdalense sp. nov. descibed in this paper (Fig. 15, 10a - b, a Lower Ordovician Proterocameroceratid...

Edited by MarcusFossils

Website: https://www.instagram.com/paleo_archives/

---------------------------------------------------------------------------

“It is by no means an irrational fancy that, in a future existence, we shall look upon what we think our present existence, as a dream.”

Edgar Allan Poe

 

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cephalopods might have fine lirae,preservation permitting

good to see you use a certain handy researchtool,BTW B)

http://www.bioone.org/doi/pdf/10.2110/palo.2006.p06-057r

I didn't notice any lirae, other than than the large sriations in the photographs

Website: https://www.instagram.com/paleo_archives/

---------------------------------------------------------------------------

“It is by no means an irrational fancy that, in a future existence, we shall look upon what we think our present existence, as a dream.”

Edgar Allan Poe

 

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I'm going to tag this fossil as being a segement of Endocers sp.

It's not a Lorraine Formation species, but it's the only ID that matches :P

Website: https://www.instagram.com/paleo_archives/

---------------------------------------------------------------------------

“It is by no means an irrational fancy that, in a future existence, we shall look upon what we think our present existence, as a dream.”

Edgar Allan Poe

 

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