Lystrosaurus is an extinctgenus of dicynodonttherapsid that lived during the Late Permian and Early Triassicperiods, around 250 million years ago in what is now Antarctica, India and South Africa. At present 4 to 6 species are recognized, although from the 1930s to 1970s the number of species was thought to be much higher. Lystrosaurus had only two teeth, as with all other dicynodonts, as well as a pair of tusk-like canines. Lystrosaurus is thought to have had a horny beak that was used for biting off pieces of vegetation. Lystrosaurus was a heavily-built, herbivorous animal, approximately the size of a pig. The structure of its shoulders and hip joints suggest that Lystrosaurus moved with a semi-sprawling gait. Lystrosaurus was by far the most common terrestrial vertebrate of the Early Triassic, accounting for as many as 95% of the total individuals in some fossil beds. It has often been suggested that it had anatomical features that enabled it to adapt better than most animals to the atmospheric conditions that were created by the Permian–Triassic extinctionevent and which persisted through the Early Triassic — low concentrations of oxygen and high concentrations of carbon dioxide. However recent research suggests that these features were no more pronounced in Lystrosaurus than in genera that perished in the extinction or genera that survived but were much less abundant than Lystrosaurus. (Read more...)
... that Irritator is only known from a skull that was badly obscured by plaster which was added by the commercial fossil-collecting fossil-poachers who illegally sold it in hopes of making the fossil look more complete and valuable?
... that rhynchosaurs had unique teeth that were modified into broad tooth plates?
... that a trackway produced by an unknown crocodyliform that measured approximately 12 meters in length was uncovered in the Galve region of Spain?
"When you were here, you stated that you should like to employ one or more young men to collect fossils in western Kansas. As perhaps you may have learned, I have been summarily discharged (with two other professors) from this college. This has been done by an incompetent, conceited clergyman, who is acting as president."
Like other mosasaurs, Platecarpus had a long, laterally flattened tail, steering flippers, and deadly, tooth-lined jaws. It was around 4.3 meters (14 ft) long, with half of that length being taken up by its sinuous tail. It probably swam in a snake-like fashion. Platecarpus probably fed on fish, squid, and ammonites. They were medium sized animals, reaching about 7 meters (23 ft) in length. The platecarpine mosasaurs had evolved into the very specialized plioplatecarpine group by the end of the Cretaceous.