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Hello everyone , 

 

I have been trying to identify this fossil for a while now, nobody seems to know. This is a fin spine from the upper cretaceous (campanian) of israel. Recovered from phosphorite rich marine deposits. 

 

It reminds me of hybodontiformes, but its different as it lacks their characteristic serrations, and by that time period they should have gone extinct in the ocean. 

 

Any help would be incredible!! 

 

 

20181117_230924.jpg

Screenshot_20221123-234307_Photos.jpg

Screenshot_20221123-234314_Photos.jpg

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Thomas.Dodson

Hybodontiformes were still alive in the Campanian. That said, I agree this doesn't look like a Hybodont.

 

it reminds me of Cylindracanthus. What does the cross section look like?

 

 

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hemipristis
8 hours ago, Thomas.Dodson said:

Hybodontiformes were still alive in the Campanian. That said, I agree this doesn't look like a Hybodont.

 

it reminds me of Cylindracanthus. What does the cross section look like?

 

 

are't they spherical in cross-section?

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It could be the tip of Aglyptorhynchus or something similar. Cylindracanthus should be circular but this looks U shaped.

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Thomas.Dodson
8 hours ago, hemipristis said:

are't they spherical in cross-section?

They are. I couldn't really tell the shape of the cross-section from these photos so I asked what the cross section looked like.

 

7 hours ago, Al Dente said:

It could be the tip of Aglyptorhynchus or something similar. Cylindracanthus should be circular but this looks U shaped.

Now that you point it out I can kind of see the cross section in the base of the first picture.

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Harry Pristis

I agree with Cylindracanthus.  For comparison:

 

fishcylindracanthusrostra.jpg.3b9b246c38d24ab0ac542f0aa0f72dc1.jpgsharkspinehybodont.JPG.ac30e54620e71379fa5d2936f9792d9a.JPG

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17 hours ago, Thomas.Dodson said:

Hybodontiformes were still alive in the Campanian. That said, I agree this doesn't look like a Hybodont.

 

it reminds me of Cylindracanthus. What does the cross section look like?

 

 

Thanks for the help! the cross section is U like. Would this still be consistent with cylindracanthus? 

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Harry Pristis
4 hours ago, dolevfab said:

Thanks for the help! the cross section is U like. Would this still be consistent with cylindracanthus? 

No, it wouldn't.  Keep searching for an ID.

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