Fossil for Sale!
Dinosaur, Pterosaur fossils
for sale in auction.

HUGE Dinosaur Age Jaw Mosasaur Fossil Tooth Mosasaurus

RARE" SUPERB Mosasaurus QUAD JAWS with 20 Teeth in hardened Sandstone Matrix A+++ No Reserve

LARGEST MOSASAURUS JAWS ON EBAY WITH NO RESERVE 

GIGANTIC Mosasaur FOUR Jaw Fragments 37 Pound Fossil from Morocco

 Last of the great marine reptiles

Mosasaurs were the dominant predator in the oceans of the late Cretaceous and were certainly the marine equivalent of Tyrannosaurus rex. The finding of the first Mosasaur remains in the Netherlands about 1780 (Mosasaurus hoffmanni) predates the discovery of dinosaurs by more than fifty years, yet they have been frequently ignored in the media and text books on paleontology in favor of the more popular ichthyosaurs and plesiosaurs.

The mosasaurus anceps and mosasaurus beaugie were one of the success stories of the late Cretaceous period. The largest known mosasaur is Hainosaurus, which could reach 17 meters in length. Giant mosasaurs were the top predator in the sea and were widespread across the world.

Much of their day would have been spent swimming slowly near the seabed looking for suitable prey to attack. Their diet consisted of slow moving animals like ammonites, birds and turtles but they would also tackle larger and swifter prey, such as sharks and plesiosaurs, when the opportunity arose.

As the mosasaurs were not fast swimmers, they would have stalked their prey using natural cover provided by seaweed and rocks. Only when the prey was within striking range would the mosasaur propel itself forward. Mosasaurs were meat-eaters with big, sharp teeth.  The crowns of these teeth are over an inch long. Being caught in a mosasaur’s jaws meant almost certain death.

 This particular Cretaceous Moroccan Prognathodon sp. Mosasaur marine fossil’s teeth and double Jaw bone fragments are imbedded in a light brown matrix of hardened phosphoric sandstone from the Sahara Desert in the Oulad Abdoun Basin near the Khouribga phosphate plateau region of Morocco, North Africa. The massive marine predator went extinct at the end of the Cretaceous about 65 million years ago along with the dinosaurs.  This set of fossilized maxilla (upper) and mandible (lower) two sets of double jaw bones measures 8 to 9“ with the 20teeth  measuring  2" to 1 1/2" lengths.  The reconstituted harden sand matrix measurements are 21 x 10 x 4 inches with the specimen having a weight of  37 pounds.

I am fortunate to have come upon a direct Moroccan source for these large fossil complexes, so check my future auctions WEEKLY for more examples of this formidable creature.

 RARE" SUPERB Mosasaurus QUAD JAW with 20 Teeth in Matrix A+++ No Reserve

Mosasaurs

(pronounced MOES-ah-SAWR) were huge predatory marine lizards, up to 40 feet in length that inhabited the world's oceans during the Cretaceous. This skeleton is one of the mosasaurs called Plioplatecarpus that inhabited the PierreSea about 75 million years ago. It was discovered in 1995 by Mike Hanson and Dennis Halvorson on Orville and Beverly Tranby's farm in the SheyenneRiverValley near Cooperstown, in Griggs County, ND.

Mosasaur were Reptiles, but not dinosaurs. They are: Vertebrates, Tetrapods of the Diapsids of the Order Squamata of the Family Mosasauridae and Subfamily Mosasaurinae (long-bodied mosasaurs) of the Genus Mosasaurus

 MOSASAURUS ASSOCIATED JAW SET IN MATRIX- Khouribga, Morocco

LATE CRETACEOUS PERIOD:  96 - 66 million years ago

Mosasaurus ancepts, the largest identified mosasaur species from the OuladAbdounBasin of Morocco and one of five species known in the Maastrichtian phosphates of the GanntourBasin of the phosphate mining district of Morocco.

Back in the second half of the 1700's, geologists made a remarkable discovery near the southernmost city of the Netherlands.  A huge skull was unearthed belonging to a gigantic reptile which had lived 65 million years ago in the waters around what is now Maastricht. The creature was later named the mosasaur, meaning ‘lizard of the Meuse or Maas river'.

Mosasaurs ate large fish, shellfish, sharks and some ate mollusks.  They lived during the same period T. rex roamed the earth.  Mosasaurs can easily be considered the T. rex of the prehistoric seas!  Such creatures were true hunter-killers that had no rival during their existence. 

Mosasaurs were the largest lizards that ever evolved and attained lengths of almost 60 feet with a skull 6 foot long!  The mosasaur was a powerful swimmer who spent its entire life in the sea. Mosasaurs had long and powerful bodies whose tails and limbs were adapted for swimming.  They probably swam by moving their long body in a snake-like way, also using their finned tail to propel them forwards. They steered with small, webbed feet.   

Mosasaurs had long heads, strong and flexible necks and hydrofoil-like limbs. Their largejaws had stabbing teeth and had a hinge in the mid-lower jaw similar to modern day constrictor snakes.

The specimen listed are real fossil jaws and teeth that are created when the preparatory Moroccan craftsman removes actual insitu (as found) fossil jaw bone sections and real teeth from blocks of brittle, crumbly sandstone matrix and then composites (reassembles them from parts) back onto a block of original crushed matrix, which is then stabilized with a thin glue solution making the whole display very stable.  These are NOT found in the ground as you are seeing them, they are composites that have been prepared and assembled for display.  Whole natural jaw sections such as this would cost you thousands of dollars more and be encased in plaster since the matrix is so brittle.

As with the vast majority of Moroccan Trilobites and other fossils, some restoration and / or repair is evident in the fossil specimen, even with close-up pictures, it is difficult to tell which part of the fossil may have been restored, I am not an expert in estimating the percent of restoration, so you be the judge of the overall percentage of original fossil and matrix.  All the fossils on display have been recently purchased from Moroccan wholesale dealers at the world-class Tucson Gem and Fossil show held in February of 2008.  All pictures are of the actual specimen being auctioned. 

Thanks for a bid, George