Albertosaurus (Alberta lizard)
Albertosaurus (Alberta lizard)
Named By : Henry Fairfield Osborn - 1905
Diet : Carnivore
Size : Estimated up to 10 meters long
Type of Dinosaur : Large Theropod
Type Species : A. sarcpohagus (type)
Found in : Canada. USA
When it Lived : Late Cretaceous, 76-74 million years ago
Albertosaurus (/ael,be:rt@’so:r@s/; meaning “Alberta lizard”) is a genus of tyrannosaurid theropod dinosaurs that lived in western North America during the Late Cretaceous Period, about 70 million years ago. The most common species, A. sarcophagus, was thought to be restricted in size to the present-day Canadian Province of Alberta, which is where the genus was named however an undetermined kind of species (“cf. Albertosaurus sp.”) was discovered inside the Corral de Enmedio and Packard Formations in Mexico. Scientists are divided on the nature of the Genus, but some recognize Gorgosaurus libratus as an additional species.
As a tyrannosaurid Albertosaurus was an animal that was bipedal with small, two-finger hands as well as a head with a multitude of sharp, large teeth. It was probably on the highest level in the chain of food within the local ecosystem. Although Albertosaurus was huge for an theropod, it was considerably smaller than its bigger and more well-known relative Tyrannosaurus Rex, which was able to grow from 8-10 m (26 to 33 feet) and perhaps having a weight of 2.5 tons (2.8 small ton) (or less).
Since the discovery of the first of 1884 fossils from over 30 people have been found which gives scientists more in-depth knowledge of Albertosaurus anatomy than what is available for other Tyrannosaurids. The discovery of 26 individuals on one location is evidence of pack behavior. It also permits studies of ontogeny and population biologythat are impossible for lesser-known dinosaurs because their fossils being more scarce and less complete compared to the remains of Albertosaurus.
Albertosaurus was bigger than the majority of Tyrannosaurids but less than Tarbosaurus as well as Tyrannosaurus. The typical Albertosaurus adults were 8-9 meters (26-30 feet) tall, while very extremely rare individuals may grow to more than 10 meters (33 feet) tall. Multiple mass estimates from various methods, indicate the adult Albertosaurus weighs between 1.3 to 2.5 tons (1.4 as well as 2.8 small tons). In 2016, Molina-Perez and Larramendi determined the biggest species (CMN 5600) at 9.7 meters (32 feet) with a weight of 4 tonnes (4.4 shorter tons).
Albertosaurus was a tyrannosaurid with an identical body type to the other Tyrannosaurids. As is typical for a theropod Albertosaurus was bipedal and balanced its heavy body with the long tail. The forelimbs of tyrannosaurids were tiny for their body’s size and had the smallest number of digits. The hind limbs were lengthy and finished with a foot that had four toes on the first digit known as the hallux was small and didn’t touch the ground. Third digit larger than the other. Albertosaurus might have reached speed of walking between 14 and 21 km/hour (8-13 miles per hour). For younger people, a fast speed of running is possible.
Two skin impressions of Albertosaurus are documented with both showing scales. One patch is found to have several gastralic ribs as well as the impression of a large unknown bone. This suggests the patch comes from the belly. The scales are pebbly , and slowly grow larger and more hexagonal in appearance. Additionally, there are two more feature scalesthat are placed 4.5 cm apart from one the other. Another skin impression comes from an unidentified part inside the human body. The scales are tiny diamond-shaped, and are arranged in rows.