Can anyone tell me which animal this belongs to?

A paper on a fossil lycopod?

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Other than Sparids

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Why aren't primary MHD generators with tokamak/stellarator configurations studied/researched?

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Kevin Stevens

This seems to be a stingray barb. What is the locality and age of this specimen?

Aaron Fehir

I believe Kevin is correct

Syed Abbas Jafar

Nabyl:

Kevin is right. It shows affinity with Stingray Barb. Kindly have a look at this link:

https://www.google.co.in/search?q=pdf+Stingray+Barb+fossil+images&newwindow=1&sa=X&biw=1571&bih=743&nfpr=1&tbm=isch&imgil=QhWgvMB2s9CQDM%253A%253BQ2lZiqDs4BZbGM%253Bhttp%25253A%25252F%25252Fwww.thefossilforum.com%25252Findex.php%25253F%25252Fgallery%25252Fimage%25252F23138-sting-ray-barb%25252F&source=iu&pf=m&fir=QhWgvMB2s9CQDM%253A%252CQ2lZiqDs4BZbGM%252C_&usg=__PV0AaX-VmXeenb7KWVkV8Jm2rt8%3D&ved=0ahUKEwiGoMHQ1d7QAhXBPI8KHfAcDYoQyjcINA&ei=TDZGWIbKPMH5vATwubTQCA#imgrc=QhWgvMB2s9CQDM%3A

Best

Syed

Sanjay Verma

Sting Ray barb correct.

Mikhail Rogov

Looks very similar to sea urchin spine (see in attachment Rhabdocidaris spines from the Upper Jurassic of the European Russia, from Gerasimov, 1955)

Nabyl Bouchilaoune

Many thanks for you @Kevin Stevens, @Aaron Fehir, @Syed Abbas Jafar and @Sanjay Verma.

I found this fossil during my field mission when I was preparing my magister on the phosphate mineralization of the djebel kouif (Tebessa, Northeast Algeria).

Jürg Wegmüller

Stingray barb/spine

Hakima Belkhattab

Hi Nabyl,

I agree with all, you specimen is a Stingray spine.

Cordially,

Hakima

Thank you @Hakima Belkhattab