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A fossil amphibian. It has a large bony slightly boomerang shaped head and then a backbone.

Image pinched from the DK Encyclopedia of Dinosaurs and Pre-historic Life.

Diplocaulus is an amphibian that lived from the late Carboniferous to the Permian.

Crossposts: https://louisedennis.livejournal.com/727905.html

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From:

fififolle

Bizarre!! Presumably it had soft bits making it another shape...
I used to read that DK book to master fifiling every night for ages when he was wee, ours is dropping to bits lol.

From:

purplecat

The reconstruction on wikipedia make it look quite flatfishy.

I feel a little bad about nicking all this pictures, on the other hand, I don't think I'm making a big dent in DK's sales...

From:

fififolle

It's free advertising!!

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purplecat

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