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
Reptile egg fossil actually an egg with a leathery shell. If the contentious fossil really is a reptile egg, it's the oldest known. The earliest known fossil rigid eggs were laid by South African crocodilians during the Late Triassic or Early Jurassic; however, the rigid eggshell itself was probably much older than these specific fossils. The oldest known fossil crocodilian eggs are from Early Cretaceous rocks of Galve, Spain. These eggs had microstructures identical to those of modern crocodiles. This suggests that once the crocodilian's rigid eggshell first evolved it changed very little over time. Crocodilian eggshell is regarded as primitive because it