Herbstosaurus Herbstosaurus Herbstosaurus is the name given to a genus of pterosaur that lived during the Jurassic period, in what is now Argentina. In 1969 Argentine paleobotanist Rafael Herbst in the province Neuquén at Picun Leufú dug up a piece of sandstone holding a number of disarticulated bones of a small reptile. At the time it was assumed the rock dated from the Middle Jurassic (Callovian), about 163 million years ago. In 1974/1975 paleontologist Rodolfo Magín Casamiquela named the find as a new genus. The type species is "Herbstosaurus pigmaeus". The genus name honours Herbst and connects his name to Greek
Agrosaurus from Australia, which seems most probable, "Rhoetosaurus" and "Ozraptor", both from the Bajocian (Middle Jurassic) would be the oldest known Australian dinosaurs. They are well documented. Agrosaurus Agrosaurus (; Greek "agros" meaning 'field' and "sauros" meaning 'lizard', "field lizard") is the name given to the remains of what was originally believed to be a Triassic prosauropod from Australia. "Agrosaurus" would thus be the oldest dinosaur from that country. However, this appears to have been an error, and the material actually appears to come from "Thecodontosaurus" or a "Thecodontosaurus"-like animal from Bristol, England. The type species is "Agrosaurus macgillivrayi". Members of