Tylosaurus Proriger, commonly known as Tylosaurus, was a massive mosasaur that existed near the late Cretaceous period. Thos deadliest hunter of the ancient seas used its specialized and frequently scarred snout as a means of defense against other creatures of its sort over territorial disputes.
That has ensured its regular inclusion in pop culture. Tylosaurus used its lengthy robust, laterally flat tail, similar to mosasaurs’, to propel across the ocean and attack its victims with flashes of propulsion. The slender torso adorned with lizard-like scales was propelled via the paddle-like limbs.
Appearance
Tylosaurus was one of the biggest aquatic reptiles, growing to a length of around 30-40 ft. Even if the slim body wasn’t completely fusiform such as that of a fish, it was nonetheless improved to be as hydrodynamic as necessary.
It was a relatively large creature when observed from the sides, yet when seen from a straight head, it should have appeared to be quite a narrow cross-section.
This greatly reduced the degree of friction Tylosaurus encountered as it moved through the water, in addition to its piercing, sloped cranium. Furthermore, the correspondingly thinner flippers compared to pliosaurs were employed less for paddling and more for maneuvering, reducing hydro-drag.
It had the behavior of living comfortably in pairs in a large lagoon and living off the fish dispensed by feeders.
A long, muscular tail provided additional propulsion and maneuverability. Tylosaurus’ skin was likely smooth and scaly, ranging in color from dark gray or brown to a lighter underside, similar to many modern marine predators. Their large, forward-facing eyes suggest excellent vision for hunting prey in the vast prehistoric oceans.
Did you know…
Some Tylosaurus snouts exhibit stress deformation that might have resulted from a jarring collision. All of these indicate that Tylosaurus rammed victims at great speeds employing extreme force. One such blow would certainly not harm the victim directly, but it might very quickly paralyze it, causing it to drift helplessly in the water, awaiting the final bite.
Habitat
Despite breathing air, Tylosaurus was well suited to live in the warmer, shallow inland seas that have been typical at the near-end of the Cretaceous period. In the Western Interior body of water, which previously inundated Northern America, Tylosaurus was the dominating species.
A detailed study of fossil remains from Sweden, including teeth, jawbones, and vertebrae, has led to the reclassification of a marine reptile species as Tylosaurus ivoensis, providing valuable insights into the variation within this type of extinct reptile.
During the Late Cretaceous, it inhabited warm, shallow seas that covered much of what is now North America. Fossils have been found in various parts of the United States, including Texas, Kansas, South Dakota, and other states. It is believed that it preferred coastal waters and estuaries, where prey were easily available.
Diet
Because of their massive size, they easily became an apex predator, thus ensuring that nothing was off-limits. The stomach contents were known to have fish, turtles, seabirds, sharks, smaller creatures, some flightless birds, enormous plesiosaurs, and other mosasaurs. They had strong jaws and huge teeth that failed the prey to escape the lethal grip of this sea monster.
It had two extra rows of teeth on the roof of its mouth. These cone-shaped teeth are referred to as the true jaws of death.
Reproduction
Their reproductive system is not fully understood, researching its extant counterparts can provide insights into this interesting animal’s life cycle. The Tylosaurus is believed to have propagated comparably to contemporary lizards.
Females would deposit their eggs in hot, sandy regions, in which the sunlight could subsequently incubate them. The newborns would’ve been left to fend for themselves in the hostile environment after they hatched.
Threats
Tylosaurus had no natural enemies to threaten them. However, they were prone to being vulnerable at the juvenile stage since newborns were left to defend themselves. It’s theorized that the main threat was other members of its species, where the bigger specimen attacks and eats the smaller ones.
Amongst the prehistoric animals its only rival was the even bigger Mosasaurus with which it fought to the death if given the occasion, often resulting in itself dying.
They would most commonly bite the head of the other, as supported by fossil evidence. While the motive of such attacks is alleged to be in the context of courtship, it is most likely a way to assert dominance over one another.
8 More Fantastic Facts about Tylosaurus
- The largest one measured a length of 39 ft (11.8 meters) and weighed around 12,000 lbs.
- This large marine reptile lived around 90 million years ago during the Cretaceous era.
- The very first fossil, consisting of a cranium and vertebrae, was found in Kansas in 1868.
- Their anatomy allowed them to swim at a speed of 30 mph while maintaining efficiency.
- Its fins were exclusively for steering and not propulsion.
- There are a large number of fossils associated with Tylosaurus, mostly from the central United States which was once the sea floor of the Western Interior Seaway.
- Its name translates to “Knob Lizard”, to the characteristics of its elongated prow-like rostrum.
- The massive size of its head meant it would have been capable of swallowing medium-sized animals or small creatures whole.
FAQs
Why did Tylosaurus go extinct?
Tylosaurus eventually went extinct during the Cretaceous mass extinction at the peak of the age, despite having developed to withstand the majority of dangers. All the non-avian dinosaurs were killed off by this catastrophe about 65 million years ago.
What distinguishes Tylosaurus from Mosasaurus?
There are two distinct species of marine reptiles in the Mosasauridea genus: Tylosaurus and Mosasaurus. They are referred to as mosasaurs as just a group. The Tylosaurus did not, however, possess teeth on its bone rostrum or around the tip of its nose like all other mosasaurs did.
Was the Tylosaurus a type of dinosaur?
You might be misled by the name of the Tylosaurus, and it’s a common misconception but they weren’t a dinosaur species as they don’t check the criteria to be designated as one. The Natural History Museum at the University of Kansas is home to the mosasaur fossils and many other species that are from the Cretaceous era.
