Spinosaurus aegyptiacus jaw 215mm. Important juvenile Spinosaurus Aegyptiacus (Egyptian spine lizard), partial anterior jaw section. Important and exceedingly rare type of dinosaur jaw of a fearsome predator from the renowned continental 'Red Beds' (continental intercalaire). This predator theropod also familiar to many thanks to the film Jurassic Park III where the Spinosaurus makes a name for itself after killing the Tyrannosaurus Rex. The formation where this particular jaw was found was between the Moroccan and Algerian borders. These areas are extremely difficult to excavate due to difficult to traverse. Presently the border regions are patrolled by the forces of each state, which are contesting regional borders making the process complex as excavators deal with the restraint of unknown territory.
Unearthing this partial juvenile Spinosaurus jaw is a very rare event, especially taking into account how the anterior section has preserved so well, it is in a very stable condition and reveals solid bone tissue, the teeth have been collected from the same location and reseated by The Fossil Store. Minor restoration to the jaw itself is by excavators in our Moroccan workshops before more restoration and the final process is carried out at The Fossil Store's Studio-Lab in the United Kingdom. Here the teeth are cleaned, restored and reseated after final restoration has taken place on the surrounding Spinosaurus jaw. You can refer to the images to see the condition of the teeth, you will see a few of the teeth have sustained damage during the fossilisation process whereas the others show wear from the lifetime of the Spinosaurus as to be expected in a large carnivorous dinosaur fossil specimen, generally the condition is excellent and by far one of our favourite pieces.
A remarkable discovery of a dinosaur ungual from the Cretaceous of Gondwanaland, now part of the continent of North Africa. The genus type is Spinosaurus. Presently two types of Spinosaurus are known from North Africa and Morocco, Spinosaurus maroccanus and Spinosaurus aegypticus, the region from where the toe claw was unearthed in the fossil layer of the Cenomanian and Turonian strata of an approximate age of 112 to 89 million years ago.
The condition is one of a found dinosaur fossil phalanx which has been conserved with an appliance of preservative which has stabilised the bone. The unrestored condition is very good. The morphology of the toe claw is very good, slightly pressed in the fossil bed which has resulted in twisting the toe claw slightly. Please study our images above.The bone typically stained with an iron red matrix, which denotes the heavy concentrations of iron minerals in the fossil layer at Kem Kem.
The dinosaur toe claw exhibits the identifying attributes of the Spinosaurid family, a very slightly recurved ventral surface or plantar surface, with a depression in the pad region. This was a point of contact of a tendon. The slightly flared flange in the medial view and groove just above this. The ungual crest having a narrowing domed dorsal section. The point of the toe claw is complete, bone structure is evident and clear to the proximal end where the blood vessel structure is profuse and well defined.
One of the most ferocious theropod dinosaur to have roamed the lagoons and waterways of what is now the northern Sahara desert of North Africa. One other dinosaur could dispute Spinosaurus for top predator at up to 59 feet in length and 21 tonnes. That is the Carcharodontosaurus, up to 44 feet in length and 15 tonnes which also ranged the Cretaceous of N.Africa. Spinosaurus being a semi-aquatic dinosaur, it is theorised the two apex carnivore dinosaurs were not in conflict over territory or prey too often. Spinosaurus having mainly a marine diet of sharks and large fish and no doubt the occasional other theropod dinosaurs, we would like to think.
There are many influences which play a role in the outcome and extraction processes when considering the value of these Dinosaur fossils and the diminishing resource, in this region of the world, of this unique site. A complete undamaged dinosaur fossil is limited in occurrence, it requires a lot of collecting time in the field to acquire such a fine example. The prestigious Spinosaurus fossils are rarer. These sites will too become exhausted, coupled with political and military unrest in the region making collecting more haphazard.
The only recorded Spinosaurus aegyptiacus partial skeleton up to the last decade of the 20th century, a partial jaw and large ribs of the sail back was discovered by the palaeontologist Ernest Stromer circa 1915. These were later lost in 1944 during a bombing raid on Germany during WWII which levelled the Munich Museum, then housing the most famous and remarkable find of Stromer's career. The much later discovery of Spinosaurus bones in the Kem Kem deposits has been described by Dale Russell in 1996, as Spinosaurus maroccanus, although to date this is not fully accredited by the whole paleontological community.
Another 40% complete skeleton was reconstructed at the museum of Chicago by Paul serene and his team. This is the most complete discovery of a Spinosaur sp. skeleton made from pieces of three different animals skeletal bones. The bones were dug by Moroccan fossil diggers in the Kem Kem region and found their way to Europe, once recognised and the importance realised they were used to build the almost half complete Spinosaur for the museum of Chicago in modern materials before the original bones returned to the Moroccan museum services.