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Name Spinosaurus
Order Saurischia
Suborder Theropoda
Class Spinosauridae
Name Translation Spined lizard from Egypt
Period Middle to Late Cretaceous (115-90 million years ago)
Location Northern Africa
Diet Fish, Pterosaurs, Carrion
Size 41-52 feet (12-16 metres) long, 16.5 to 20 feet (5 to 6 metres) high (including sail)
Date of Discovery February 15th 1912

Spinosaurus ("spined lizard") is a genus theropod that existed in what is now North Africa, from the Albian to early Cenomanian stages of the Cretaceous Period, about 112 to 97 million years ago.


According to recent estimates, Spinosaurus may be the largest of all theropods, possibly even larger than Tyrannosaurus rexGiganotosaurus and Carcharodontosaurus. These estimates suggest that it was around 12.6 to 16 meters in length

Spinosaurus Size

(41 to 52 feet) and between 7 and 9-12 tons in weight. This genus was first known from a set of Egyptian remains discovered in 1912 and described in 1915 by German paleontologist and aristocrat Ernst Stromer. These original remains were sadly destroyed in an Allied bombing run over Berlin during World War II, but additional skull material has come to light in recent years. It is unclear whether one or two species are represented in the described fossils. The best known species is Spinosaurus aegyptiacus from Egypt, although a potential second species named Spinosaurus maroccanus has been discovered in Morocco in recent times but it is most likely another animal. Spinosaurus is thought to have eaten large fish most of the time, but evidence suggests that it lived both on land and in water like a modern-day crocodilian.


Two species of Spinosaurus have been named: Spinosaurus aegyptiacus (meaning "Egyptian spine lizard") and Spinosaurus maroccanus (meaning "Moroccan spine lizard")

The first described remains of Spinosaurus were found and described in the early 20th century. In 1912, Richard

Spinosaurus swimming

A Spinosaurus Skeleton

Markgraf discovered a partial skeleton of a dinosaur in the Bahariya Formation of western Egypt. In 1915, German paleontologist Ernst Stromer published an article assigning the specimen to a new genus and species Spinosaurus aegyptiacus.

Fragmentary additional remains from Bahariya, including vertebrae and hindlimb bones, were designated by Stromer as "Spinosaurus B" in 1934.[18] Stromer considered them different enough to belong to another species, and this has been borne out. With the advantage of more expeditions and material, it appears that they pertain either to Carcharodontosaurus or to Sigilmassasaurus.

We don't have complete Spinosaurus' skeletons, but we have some of his parts of body. We have about 8ft long jaws, formed to grabbing and neural spines, that maybe created the sail. But, w have near complete skeletons of his cousins, Baryonyx and Suchomimus. They were just smaller versions of Spinosaurus, without a sail. So we can easily reconstruct the spinosaurus based on mentioned dinosaurs.

S. maroccanus was originally described by Dale Russell in 1996 as a new species based on the length of its neck vertebrae. Specifically, Russell claimed that the ratio of the length of the centrum (body of vertebra) to the height of the posterior articular facet was 1.1 in S. aegyptiacus and 1.5 in S. maroccanus. Later authors have been split on this topic. Some authors note that the length of the vertebrae can vary from individual to individual, that the holotype specimen was destroyed and thus cannot be compared directly with the S. maroccanus specimen, and that it is unknown which cervical vertebrae the S. maroccanus specimens represent. Therefore, though some have retained the species as valid without much comment, most researchers regard S. maroccanus as a nomen dubium or as a junior synonym of S. aegyptiacus.

General Description

The facts on this aniaml have changed dramaticly recently (as seen in National Geographic) The ratio between the size of arms verse legs is now thought to be greatly different the previously. Scientist now think the animal was almost certainly semi-aquatic. The animal is now certainly longer abiet possibly slightly lighter than Tyrannosaurus.

Spinosaurus is estimated to have grown to 17 meters (57 feet) long and is one of the biggest carnivorous dinosaurs that lived. It got its name, which

means "spine lizard," because of the tall spines on its vertebrae (bones of the spine), some reaching a height of six feet! They formed a sail along the animal's back, though not likethose of the Permian mammal-like reptile Dimetrodon and Ouranosaurus, the hadrosaur that lived in the same time period and area, and may be a prey of the Spinosaurus.

Spinosaurus Head

Many theories surround the "sail", saying that it may have been a thermal regulator, releasing heat on hot days and absorbing heat on colder days. It also may have been used as a display to attract members of its own species and intimidate other species. However, new studies have shown that its "sail" is closer to resemble a crest or hump. This would add more muscle to its crest making its strength increase, however, not many believe this and considering how tall the spines are, it isn't likely. We know that these neural spines are elongated vertebrae, so spinosaurus can easily be paralized when mentioned spines were bitten or crushed. Spinosaurus was believed to grow 52 feet (16 m) long, 11-13 feet (3.5-4 m) tall (including sail), was
Drinking Spino

A Spinosaurus hunting for fish.

7-12 tons (14,000-24,000 lbs), had 6-foot (1.8 m) spines, 5-foot (1.5-meter) long and powerful arms, and had a 4-6 foot (1.3-1.8 m) skull, meaning Spinosaurus could be the largest carnivorous dinosaur that ever walked the Earth.

Spinosaurus' primary weapon are its mighty arms, designed to killing and to walking. Then, secondary weapon are its specialized jaws. These jaws are formed for the grabbing the prey and they are most similar to these of crocodile. So, scientists guess that it used them like a crocodile, to throw prey from side to side. Brutally torn the prey into smaller 'pieces'.  

Spinosaurus was likely a semi-aquatic animal. Proof of this is the elongated feet, hydrodynamic design and sensors in the form of small holes, on the top of its snout. They were perfect for locating fish or enemy (such as Sarcosuchus) in the water. This pointed when An 2010 isotope analysis by Romain Amiot and colleagues found that oxygen isotope ratios of spinosaurirud teeth, including teeth of Spinosaurus, indicate semiaquatic lifestyles. The Spinosaurus probably used its mouth much like crocodiles; brutally but very effectivelly torn prey into smaller 'pieces'. 

Also That Isotope ratios from tooth enamel and from other parts of Spinosaurus and of other predators from the same area such as Carcharodontosaurus were compared with isotopic compositions from contemporaneous theropods, turtles, and crocodilians. 

The study found that Spinosaurus teeth from five of six sampled localities had oxygen isotope ratios closer to those of turtles and crocodilians when compared with other theropod teeth from the same localities. The authors postulated that Spinosaurus Switched its living/hunting Territory between terrestrial and aquatic habitats to compete for food with large crocodilians and other large theropods. This is strongly suggest The Spinosaurus has more Amphibious (Lives Between Both Land and Both Water) lifestyle rather than a Fully Aquatic lifestyle. 

Even though the skeleton is incomplete, Spinosaurus shows several other interesting features. It's The
Spino and Carcharodontosaurus

Spinosaurus food: Giant Car-Sized Sawfish

largest theropod discovered to date. The teeth are different from other theropod teeth because they were conical and the serrations (the cutting ridges along the sides) were very small. These tooth features, along with the shape of the skull bones, show that Spinosaurus is similar to Baryonyx and Suchomimus. They are both part of the group spinosauridae, but Spinosaurus belongs to a sub-group known as spinosauridae, while Baryonyx belongs to a separategroup known as baryonychidae, which have different features among their members. 

Spinosaurus is believed to have eaten fish, but there has been controversy about a dinosaur of that size
Spinosaurus Old

A Very Inaccurate Spinosaurus

relying on just fish, no matter how big the fish were. It's most likely that Spinosaurus ate large fish most of the time, but in times of famine and drought it would likely scavenge large animals and hunt small to large-sized prey. Its also possible Spinosaurus use its size and Claws to scare off other Carnivores (like Carcharodontosaurus and Sarcosuchus) and eat/scavenge their kill much like Short-Faced Bears of İce Age.

In 2014, Paul Sereno discovered that Spinosaurus' vertebrae actually had a dip in the sail and its legs were much shorter than previously thought. This has brought the suspicion that Spinosaurus was likely more aquatic than previously thought, spending nearly all of its time in the water, and almost all its entire diet was piscivorous based. Its shorter legs have also made scientists wonder if part of the time Spinosaurus was semi-quadrupedal instead of bipedal like most theropods.

The original first skeleton of this theropod was destroyed during the course of World War II. However, a piece of a skull bone belonging to another Spinosaurus that was found on a shelf in a German museum. It is most likely that another expedition to Egypt would uncover more skeletons so that more can be learned about Spinosaurus.  It also lived with sauropods like Paralititan, other large carnivores like Carcharodontosaurus and Sauroniops, and large crocodiles like Sarcosuchus.

In the Media

Spinosaurus JP

Spinosaurus in Jurassic Park ///

Spinosaurus has become an iconic dinosaur and its famous for the highly popular dinosaur movie: Jurassic Park ///, the only Jurassic Park film not based on a Michael Crichton book. Spinosaurus was portrayed as the main villain beast that caused destruction in his path. In an infamous scene, a Spinosaurus was seen fighting a Tyrannosaurus rex, though this fight could not have occurred in the specified time period as the two dinosaurs lived during different times of the Cretaceous Period, but this happen in the movie because the dinosaurs were recreated and put on an island. During the battle, the Tyrannosaurus had the advantage with its first bite. However, Spinosaurus out-muscled the Tyannosaurus rex and broke free using its strength and arms. Spinosaurus locks it powerful jaws onto the neck of the Tyrannosaurus, then uses its longer arms to dislocate the neck, causing the Tyrannosaurus to die. This is an unlikely event to have actually ever happened, considering the Two Predators never lived even in the same time neither in the same continent. 

Spinosaurus carnivores1

Spinosaurus in The Carnivores PC game.

Spinosaurus also appears in many video games such as Jurassic Park: Operation Genesis, Zoo Tycoon, Carnivores 2, and many more. It is also popular as a player made animal in "Zoo Tycoon 2."

Spinosaurus appears in the video game Carnivores 2, with an inaccurate anatomy because in the epoch there was little information about this dinosaur.

Spinosaurus arena

Primeval Spinosaurus

Spinosaurus appears in series 4 of Primeval and is shown living in the same place as a Raptor (Dromaeosaurus). Another one appears in Series 5.

Spinosaurus is also in Monsters Ressurected, portrayed as the "Biggest Killer Dino", where it was inacccurately shown to be the 


Spinosaurus in Monsters Ressurected

super top predator on land. It was seen lifting up a Rugops, kill a Carcharodontosaurus with a single slash of its claws, and slice up the sides of Sarcosuchus. The portrayal was noticably over-powered compared to the real animal, and although formidible it was unlikely to have been able to kill with a single strike of its claws. And Spinosaurus would be eaten is it ran into a Sarcosuchus A Spinosaurus, nicknamed "Spike", makes an appearance in the video game Jurassic: The Hunted, appears as a boss.

Bizarre Dinosaurs Spinosaurus

Spinosaurus appears in Bizarre Dinosaurs, where its sail is talked about.

Spinosaurus appears in the Japanese animated film Doraemon: Nobita's Dinosaur 2006, where it is the abused pet of an evil time-travelling dinosaur poacher. Also, near the climax, Spinosaurus faces off with Tyrannosaurus once again, only this time losing.

Spinosaurus appears accurately in the first episode of Planet Dinosaur as a fish hunter
LBT SPinosaurus

The Land Before Time Spinosaurus

and shown to hunt land animals if there is no aquatic animals to eat, and competes against a Carcharodontosaurus for an Ouranosaurus carcass and defeats it in battle with its claws. This, once again, shows that Spinosaurus wasn't just exclusive to fish. At the end, it was seen lying dead due to İnfected injury in its sail from The Carcharodontosaurus bite and the starvation from habitat loss.

It also is a playable character in Primal Carnage.

Primal Carnage Spinosaurus

Spinosaurus also appears in the 12th episode of The Land Before Time, but is inaccurately shown with only two fingers.

A Spinosaurus makes a brief appearance in the Asylum film Age of Dinosaurs where it somehow is able to climb on top of a tall building.


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