Post by dinosauria101 on Jul 3, 2019 17:22:50 GMT 5
Daspletosaurus torosus (pack of 3)
While very large by the standard of modern predators, Daspletosaurus was not the largest tyrannosaurid. Adults could reach a length of 8–9 meters (26–30 ft) from snout to tail. Mass estimates have centered on 2.5 t (2.5 long tons; 2.8 short tons), but have ranged between 1.8 and 3.8 t (1.8 and 3.7 long tons; 2.0 and 4.2 short tons). Daspletosaurus had a massive skull that could reach more than 1 meter (3.3 ft) in length. The bones were heavily constructed and some, including the nasal bones on top of the snout, were fused for strength. Large fenestrae (openings) in the skull reduced its weight. An adult Daspletosaurus was armed with about six dozen teeth that were very long but oval in cross section rather than blade-like. Unlike its other teeth, those in the premaxilla at the end of the upper jaw had a D-shaped cross section, an example of heterodonty always seen in tyrannosaurids. Unique skull features included the rough outer surface of the maxilla (upper jaw bone) and the pronounced crests around the eyes on the lacrimal, postorbital, and jugal bones. The orbit (eye socket) was a tall oval, somewhere in between the circular shape seen in Gorgosaurus and the 'keyhole' shape of Tyrannosaurus.
Siats meekerorum
Siats is an extinct genus of large neovenatorid theropod dinosaur known from the Late Cretaceous Cedar Mountain Formation of Utah, USA. It contains a single species, Siats meekerorum. S. meekerorum is the first neovenatorid discovered in North America and represents the geologically youngest allosauroid yet discovered from the continent. The holotype came from a single immature individual, based on its incompletely fused neural arches to their centra in the vertebral column. The taxon is characterized by seven diagnostic (including four autapomorphies) features which include the broad neural spines on the dorsal vertebrae and the subtriangular crosssection of the distal caudal vertebrae, with the latter being an autapomorphy. The discovery of this neovenatorid also reveals that tyrannosauroids did not begin to dominate North America until the late cretaceous due to the presence of allosauroids such as Siats. Siats represents the third largest theropod from North America, after Acrocanthosaurus and Tyrannosaurus. Weight?? "At 24 feet (7.3 meters) long and weighing about 2.5 tons, the 80-million-year-old Lythronax (pronounced LYE-thro-nax) lacked the even-more-massive size of T. rex, says the University of Utah's Mark Loewen, who headed the team reporting the dinosaur's discovery in PLOS One." A adult would have presumably been larger.
NOTE: Siats was probably a tyrannosauroid instead of an allosauroid, and would've likely weighed about 6 tons as an adult
Credit to Wikipedia
While very large by the standard of modern predators, Daspletosaurus was not the largest tyrannosaurid. Adults could reach a length of 8–9 meters (26–30 ft) from snout to tail. Mass estimates have centered on 2.5 t (2.5 long tons; 2.8 short tons), but have ranged between 1.8 and 3.8 t (1.8 and 3.7 long tons; 2.0 and 4.2 short tons). Daspletosaurus had a massive skull that could reach more than 1 meter (3.3 ft) in length. The bones were heavily constructed and some, including the nasal bones on top of the snout, were fused for strength. Large fenestrae (openings) in the skull reduced its weight. An adult Daspletosaurus was armed with about six dozen teeth that were very long but oval in cross section rather than blade-like. Unlike its other teeth, those in the premaxilla at the end of the upper jaw had a D-shaped cross section, an example of heterodonty always seen in tyrannosaurids. Unique skull features included the rough outer surface of the maxilla (upper jaw bone) and the pronounced crests around the eyes on the lacrimal, postorbital, and jugal bones. The orbit (eye socket) was a tall oval, somewhere in between the circular shape seen in Gorgosaurus and the 'keyhole' shape of Tyrannosaurus.
Siats meekerorum
Siats is an extinct genus of large neovenatorid theropod dinosaur known from the Late Cretaceous Cedar Mountain Formation of Utah, USA. It contains a single species, Siats meekerorum. S. meekerorum is the first neovenatorid discovered in North America and represents the geologically youngest allosauroid yet discovered from the continent. The holotype came from a single immature individual, based on its incompletely fused neural arches to their centra in the vertebral column. The taxon is characterized by seven diagnostic (including four autapomorphies) features which include the broad neural spines on the dorsal vertebrae and the subtriangular crosssection of the distal caudal vertebrae, with the latter being an autapomorphy. The discovery of this neovenatorid also reveals that tyrannosauroids did not begin to dominate North America until the late cretaceous due to the presence of allosauroids such as Siats. Siats represents the third largest theropod from North America, after Acrocanthosaurus and Tyrannosaurus. Weight?? "At 24 feet (7.3 meters) long and weighing about 2.5 tons, the 80-million-year-old Lythronax (pronounced LYE-thro-nax) lacked the even-more-massive size of T. rex, says the University of Utah's Mark Loewen, who headed the team reporting the dinosaur's discovery in PLOS One." A adult would have presumably been larger.
NOTE: Siats was probably a tyrannosauroid instead of an allosauroid, and would've likely weighed about 6 tons as an adult
Credit to Wikipedia