Dinosaurs

Blogs about dinosaurs

Oksoko avarsan fossils

An article published in the journal “Royal Society Open Science” reports the identification of a new species of parrot-like feathered dinosaur that lived in modern Mongolia about 68 million years ago, at the end of the Cretaceous period. A team of researchers named it Oksoko avarsan after examining various specimens in various states of incompleteness. Some of the specimens had been confiscated by the Mongolian authorities after they were found in the possession of smugglers. These dinosaurs were classified within the oviraptorid (Oviraptoridae) family, but were toothless and had two fingers instead of the typical three of their closest relatives.

Spinosaurus aegyptiacus skeleton

An article published in the journal “Cretaceous Research” reports the discovery of hundreds of teeth of Spinosaurus aegyptiacus in the ancient Kem Kem river system, along the border between today’s Morocco and Algeria. A team of researchers collected about 1,200 fossil teeth in an ancient river bed in today’s Morocco, and analysis revealed that nearly half of them were of Spinosaurus aegyptiacus. Their conclusion is that it’s evidence that about 100 million years ago, in the Cretaceous period, this dinosaur was well adapted to aquatic life, a confirmation of the thesis supported by a growing number of paleontologists.

Sauropod fossil embryo

An article published in the journal “Current Biology” reports the study of a fossil embryo of titanosaur dating back to about 80 million years ago, in the Cretaceous period, that came from Argentina. A team of researchers led by Dr. Martin Kundrat used sophisticated techniques to study it. The egg around it was dissolved by applying very carefully an acid preparation, and at that point, the embryo was scanned at the European Synchrotron Radiation Facility (ESRF) in Grenoble, France, which made it possible to create a three-dimensional reproduction. The examination offers new insight into the development of sauropods, the large group of herbivorous dinosaurs, and particularly their skulls, indicating that at least titanosaurs had stereoscopic vision and a horn like rhinos that was lost in adulthood.

Sinlhouette of Lusovenator santosi with the available bones

An article published in the “Journal of Vertebrate Paleontology” reports the identification of a carnivorous dinosaur that lived in today’s Portugal between 153 and 145 million years ago, in the Jurassic period. A team of researchers led by Dr. Elisabete Malafaia of the Portuguese University of Lisbon named it Lusovenator santosi and attributed it to the Carcharodontosauria group, part of the larger group of allosaurs, carnivorous dinosaurs that were superpredators in their ecosystems. This species is very ancient within its group and its discovery offers some new information on the first phase of these dinosaurs’ diversification, which is currently poorly known due to the scarcity of fossils.

Aratasaurus museunacionali fossil

An article published in the “Scientific Reports” journal announces the discovery of a new species of carnivorous feathered dinosaur that lived in today’s Brazil about 104 million years ago, in the Cretaceous period. A team of paleontologists named it Aratasaurus museunacionali and attributed it to the group of coelurosaurs. The examination of the few available bones of the uncovered specimen indicates that it was a juvenile, but its length already exceeded three meters. An interesting conclusion is that the new species according to the researchers is a close relative of Zuolong salleei, a dinosaur that lived in today’s China about 160 million years ago, in the Jurassic period.