3.07" Fossil Fish (Ichthyodectes) Jaw Section - Kansas

This is a 3.07" wide, fossil jaw section of an Ichthyodectes fish from the Smoky Hill Chalk of Gove County, Kansas. This bone has good preservation and beautiful color. Aside from a couple repaired cracks, there is very little restoration on this awesome piece.

Ichthyodectes was a bony fish of the order Ichthyodectiformes, which in addition to Ichthyodectes includes the giant, Xiphactinus and smaller Gillicus. Large ichthyodectes grew to more than 10 feet long and were a one of the principle predators of the Western Interior Seaway during the late Cretaceous Period.

Ichthyodectes anaides, Smithsonian National Museum of Natural History.
Ichthyodectes anaides, Smithsonian National Museum of Natural History.

The Smoky Hill Chalk Member of the Niobrara Chalk formation is a Cretaceous conservation Lagerstätte, or fossil rich geological formation, known primarily for its exceptionally well-preserved marine reptiles. It outcrops in parts of northwest Kansas, its most famous localities for fossils, and in southeastern Nebraska. Large well-known fossils excavated from the Smoky Hill Chalk include marine reptiles such as plesiosaurs, large bony fish such as Xiphactinus, mosasaurs, pterosaurs, and turtles.

Ichthyodectes sp.
Gove County, Kansas
Niobrara Formation
3.07" wide
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