Pteranodon
"Pteranodon" was the first pterosaur found outside of Europe. Its fossils first were found by Othniel Charles Marsh in 1870, in the Late Cretaceous Smoky Hill Chalk deposits of western Kansas. These chalk beds were deposited at the bottom of what was once the Western Interior Seaway, a large shallow sea over what now is the midsection of the North American continent. These first specimens, YPM 1160 and YPM 1161, consisted of partial wing bones, as well as a tooth from the prehistoric fish "Xiphactinus", which Marsh mistakenly believed to belong to this new pterosaur (all known pterosaurs up to that point had teeth). In 1871, Marsh named the find ""Pterodactylus oweni"", assigning it to the well-known (but much smaller) European genus "Pterodactylus". Marsh also collected more wing bones of the large pterosaur in 1871. Realizing that the name he had chosen had already been used for Harry Seeley's European pterosaur species "Pterodactylus oweni" in 1864, Marsh re-named his giant North American pterosaur Pterodactylus occidentalis, meaning "Western wing finger," in his 1872 description of the new specimen. He also named two additional species, based on size differences: Pterodactylus ingens (the largest specimen so far), and Pterodactylus velox (the smallest).
Gannat
The most ancient discoveries in Gannat, ancestors of the rhinoceros from the end of the Oligocene and start of the Miocene, date back 23 million years. Gannat seems to have been a veritable cemetery for these creatures, so many of their remains have been discovered. Also found are fossils of fish, reptiles, tortoises, crocodiles, galliform birds, mammals, marsupials, insectivores, rodents and carnivores. The site is particularly rich in rhinoceros. From 1854, Duvernoy has even described a specimin as "Acerotherium gannatense" (the official name is "Diaceratherium lemanense"). The most complete rhinoceros skeleton was discovered in 1993 when significant fossils were uncovered at the Sichaux quarry by paleontologist François Escuillié (notable discoverer of a small proboscidian mammal, ancestor of the elephant from 50 million years ago). Escuillié was behind the establishment of the Rhinopolis Association in 1994 and founder of Eldonia, a society for those specialising in the renovation of fossils and whose activities are linked to Rhinopolis. The Rhinopolis Association is still active in the Gannat quarries and, since the 1990s, has discovered numerous rhinoceros bones.