US researchers have discovered a previously unknown early relative of the Tyrannosaurus rex. The small predatory dinosaurs Suskityrannus hazelae lived prior to around 92 million years ago, it was said in the journal Nature, Ecology and Evolution published study.
p. hazalea reached a hip-height of less than one Meter and weighed between 20 and 41 pounds. In comparison to a full-grown T. rex., the could reach nine tons, he was so small. The skull of the type was only 25 to 32 inches long, but the dinosaurs had, according to the researchers, a strong bite force. The dinosaur also possessed a special walking boot.
The species is phylogenetically the oldest, smallest tyrannosaurs sauroiden and the later giants of the representatives, such as T. rex., the lived in front of around 80 to 66 million years ago.
The new style of the associated parts of the skeleton had been found, according to a communication from the University of Virginia already more than 20 years ago in the Zuni basin in the U.S. state of New Mexico. The paleontologist Sterling Nesbitt, who described p. hazelae now together with his Team, had found the Remains of one of the dinosaurs as a 16-Year-old student even as he participated in 1998 in an excavation.
The dinosaurs according to the latest findings about 243 million years ago in the Mesozoic era (the Mesozoic). It is divided into three periods: the Triassic, the Jurassic and the Cretaceous. The Triassic period, almost the entire land mass on the super continent Pangea was summarized, referred to the period from 251 million to 200 million years. On the Triassic to the Jurassic 200 to 145 million years ago, the continent broke apart and slowly in the present-day continents split.
the time of the chalk in front of 145 to 65 million years ago. With the end of the Cretaceous, almost all of the dinosaurs were exterminated. As you look at the birds as descendants of a group of dinosaurs that are not extinct but, strictly speaking, complete.
Of the reptiles, which were then on the earth, survived, for example, crocodiles, snakes, lizards and turtles.
The world of plants changed during this time dramatically. Of former landscapes with coniferous forests and Ginkobäumen the image is changed in the chalk woods-time foliage and Bush landscapes. Responsible for the development of the flowering plants in the early Cretaceous.