3.9" Hybodus Shark Dorsal Spine - Cretaceous

 
 
This
A complete fossil of Hybodus from Germany showing placement of spine.  Image under GNU Free Documentation License
A complete fossil of Hybodus from Germany showing placement of spine. Image under GNU Free Documentation License
is a dorsal spine of the extinct Cretaceous aged shark Hybodus. These spines helped to support the dorsal fins of the shark. It's just under 4 inches in length and has a single repaired crack in the middle.

Hybodus was a small shark that grew up to 2 meters in length and was thought to have been an opportunistic predator. It had a streamline shape which would have made it adept at hunting down fast prey as well as two different types of teeth sharp cutting teeth for catching prey and flatter grinding teeth for crushing. It is believed that this combination is the key to Hybodus' success.

A paper on Hybodus spines can be found below.

Growth And Form of Finspines In Hybodont Sharks

A complete fossil of Hybodus from Germany showing placement of spine.  Image under GNU Free Documentation License
A complete fossil of Hybodus from Germany showing placement of spine. Image under GNU Free Documentation License
DETAILS
SPECIES
Hybodus sp.
LOCATION
Taouz, Kem Kem Basin, Morocco
SIZE
3.9" long
CATEGORY
ITEM
#5940
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