Jump to content

Holy grail Dunkleosteus terrelli partial skull for my collection


Pliosaur

Recommended Posts

Hello everyone!

 

I wanted to share a holy grail fossil that I have obtained: a partial skull of Dunkleosteus terrelli found in Cleveland Shale, Ohio

This specimen has been confirmed by Zerina Johnson, a leading paleontologist at the Natural History Museum of UK as well as James Boyle who is a leading expert in the field  and published academic research papers on Dunkleosteus and other placoderms of the Devonian period. 

 

Below is an excerpt from James Boyle on the Dunkleosteus partial skull specimen: 

 

"Yes, it's most like a Dunkleosteus based on what I can see. You have both anterior dorsal lateral plates of the thoracic armor there. These are the bones that connected with a mobile joint the head and shoulder regions of the armor. The bone to the bottom left is the internal view of the left anterior dorsal lateral plate. The bone under it is the right anterior dorsal lateral plate in external view. The piece that's skewed to the right a bit in the image is part of the left anterior dorsal lateral plate as well. The easiest way to identify which of the two plates is the external (from the outside) view is that there's a sensory line canal on the one plate (it's straight nearly straight line tracing across the one bone at the top). These are the lateral line system you can still see in some modern fishes and act as pressure sensors to detect movement in the water around the organism. They are only found on the outside of the body."

 
"That oblong bone at the top is probably a piece of the paranuchal plate, but if that's the case it's only a very small fraction of it."
 

Johanson Z (null) Vertebrate cranial evolution: Contributions and conflict from the fossil record. Evolution & Development, doi: 10.1111/ede.12422

Lebedev OA, Johanson Z, Kuznetsov AN, Tsessarsky A, Trinajstic K, Isakhodzayev FB (null) Feeding in the Devonian antiarch placoderm fishes: a study based upon morphofunctional analysis of jaws. Journal of Paleontology, 1 - 18. doi: 10.1017/jpa.2022.54

Charest F, Johanson Z, Cloutier R (2022) The preorbital depression and recess of antiarch placoderms (jawed stem-gnathostomes) revisited from an ontogenetic (saltatory) point of view. Journal of Vertebrate Paleontology, 42 (1) : doi: 10.1080/02724634.2022.2116335

 

Johanson Z (2021) Paleontology: There are more placoderms in the sea. Current Biology, 31 (16) : R1012 - R1014. doi: 10.1016/j.cub.2021.06.073

 

van Mesdag SNK, den Blaauwen J, Dean MN, Johanson Z (2020) Hyperossification in the vertebral column of Devonian placoderm fishes (Arthrodira). Journal of Vertebrate Paleontology, 40(1) : e1766477 - e1766477. doi: 10.1080/02724634.2020.1766477

978402874_ScreenShot2023-01-26at9_21_05PM.png.0f86fa0cf69cff7b1c7a789fcfd1f21a.png

86140_ScreenShot2023-01-30at12_53_06PM.png

  • Enjoyed 16
Link to comment
Share on other sites

  • 2 weeks later...

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...