Tylosaurus proriger Mosasaur Snout

from the Kansas Niobrara Formation

Tylosaurus proriger

Class Reptilia, Order Squamata, Family Mosasauridae

Geological Time: Upper Cretaceous

Size: (25.4 mm = 1 inch): Fossil is 310 mm long by 185 mm high by 30 mm thick

Fossil Site: Smoky Hill Chalk, Niobrara Formation, Western Kansas

Fossil Code: SRC17

Price: Sold

Tylosaurus proriger FossilThis is a fine example of the muzzle and jaws of a Mosasaur known as Tylosaurus proriger. It consists of both the right and left mandibles as well as the maxilla and Mosasaurassociated bones and teeth. The display side was found facing downwards, resulting in preservation of many of the teeth in situ. The snout is compressed in part as a consequence of the fact that the bones were articulated in such a way that the jaws could be expanded to accommodate larger prey. While Tylosaurus was a large Mosasaur with a maximum length of some 15 meters, this one was a juvenile perhaps 3-4 meters in overall length. These seagoing lizards became extinct at the end of the Cretaceous, and have the modern-day Varanids (monitor lizards) as their closest living relatives.

Fossils Purchase Information

click to enlarge


Fossil Mall Navigation:
l Home l Fossils for Sale Map l Museum and Rare Fossils l How to Buy Fossils l

Navigate by Fossil Category:
l Trilobites
l Ammonites l Fish Fossils l Invertebrate Fossils l
l Crinoids and Echinoderms l Insect Fossils l Dinosaur and Reptile Fossils l
l Cambrian Explosion Fossils l Plant Fossils l Stromatolites l
l Vertebrate Fossils l Fossil Amber l Trace & Ichnofossils l

l Fossils and Paleotological Science Information l