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Real Deltadromeus bone?


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I saw this specimen for sale 

seller labeled it as Deltadromeus sp.

limb & rib bone

Kem Kem Basin ,South Taouz, Baharija Firmation

 

would love to here your opinion on these specimen identification .

 

thx.

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They are just unknown bones nothing diagnostic to say who belongs to them.  Most probably Croc.

Baharija Formation is not a Morocco unit its Egyptian. 

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3 minutes ago, Troodon said:

They are just unknown bones nothing diagnostic to say who belongs to them.  Most probably Croc.

Baharija Formation is not a Morocco unit its Egyptian. 

thank for the reply . 

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Mostly unidentifiable bones. Likely rib pieces. Only the bone density could give you a clue as to whether these belong to dinosaur or croc. Croc tends to have more dense bone. But then so does Spinosaurus.

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Olof Moleman AKA Lord Trilobite

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On 7/19/2020 at 1:11 AM, LordTrilobite said:

Only the bone density could give you a clue as to whether these belong to dinosaur or croc. Croc tends to have more dense bone. But then so does Spinosaurus.

 

To expand on @LordTrilobite's answer, the reason for this difference in bone-density has to do with an animal's (semi-)aquatic life-style. Many secondarily aquatic animals develop higher bone-densities to help achieve neutral buoyancy, as do animals that spend significant amounts of time in the water (i.e. they don't need to expend energy to prevent themselves either sinking or floating to the surface). This condition is formally known as pachyosteosclerosis ("pachy" meaning "thick", "osteon" meaning "bone" and "sklerós" meaning "hard"; all from Greek), sometimes - especially in older literature - referred to as pachyostosis (sensu latu). Bones exhibiting this condition are therefore known as pachyostic, and are typically a good indicator for an animal having an aquatic life-style.

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'There's nothing like millions of years of really frustrating trial and error to give a species moral fibre and, in some cases, backbone' -- Terry Pratchett

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On 7/18/2020 at 7:35 PM, Troodon said:

Baharija Formation is not a Morocco unit its Egyptian. 

Even so, based on the adhering matrix, I'd say that the information provided on the locality seems correct. That is, Kem Kem, South Taouz. The formation is definitely incorrect, however, and should likely be either Gara Sbaa or, the somewhat older, Douira (see this article for more details).

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'There's nothing like millions of years of really frustrating trial and error to give a species moral fibre and, in some cases, backbone' -- Terry Pratchett

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