4.9" Cretaceous Shark (Hybodus) Dorsal Spine - Morocco

This
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A complete fossil of Hybodus from Germany showing placement of spine. Image under GNU Free Documentation License
is a nice dorsal spine of the extinct Cretaceous aged shark Hybodus. These large spines helped to support the dorsal fins of the shark.

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

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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
FORMATION
Kem Kem Beds
SIZE
4.9" long
CATEGORY
ITEM
#93925
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