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Helicoprion is a genus of extinct shark-like [1] eugeneodont fish. Almost all fossil specimens are of spirally arranged clusters of the individuals' teeth, called "tooth whorls", which in life were embedded in the lower jaw. As with most extinct cartilaginous fish, the skeleton is mostly unknown.
Members of the Eugeneodontiformes are further classified into different families, the most well-preserved members that have been discovered are commonly placed within the families Helicoprionidae ("spiral saws"), and Edestidae ("those which devour"), the former containing the genera Helicoprion, Sarcoprion, and Parahelicoprion, and the latter ...
Of the formation's two strata which preserve fish fossils, Parahelicoprion is known only from the upper (younger) layer, while the majority of observed species come from a slightly older layer below it. Among these species, actinopterygians (ray-finned fish) and holocephalans have been identified.
Ornithoprion is a genus of extinct cartilaginous fish in the family Caseodontidae. The only species, O. hertwigi, lived during the Moscovian stage of the Pennsylvanian, between 315.2 to 307 million years ago, and is known from black shale deposits in what is now the Midwestern United States.
Hybodus is thought to have been an active predator which was capable of consuming swiftly moving prey, [18] probably predominantly cephalopods and, to a lesser extent, fish. [19] Based on fossilized stomach contents, it has been proposed that Hybodus was a more active hunter than its close relatives like Asteracanthus, which likely fed on ...
A mysterious "monster" fish with teeth washed up on shores of a California park in a "very rare" sighting on Friday, 13 October. Crystal Cove State Park posted images of the specimen on their ...
One of the coolest, most prehistoric-looking fish lives in Florida’s offshore waters of the Gulf of Mexico. It happens to be one of the best to eat but also one of the most elusive.
The photos were posted on Facebook by a woman who said she reeled it in near the Stockton Boat Docks. Many are now Rare fish with 'human-like' teeth found in Delta