Catopsbaatar
Catopsbaatar is a genus of multituberculate, an extinct order of rodent-like mammals. It lived in what is now Mongolia during the late Campanian age of the Late Cretaceous Period, about 72 million years ago. The first fossils were collected in the early 1970s, and the animal was named as a new species of the genus "Djadochtatherium " in 1974, "D. catopsaloides". The specific name refers to the animal's similarity to the genus "Catopsalis". The species was moved to the genus "Catopsalis" in 1979, and received its own genus ("Catopsbaatar", Greek and Mongolian for "visible hero") in 1994. Five skulls, one molar, and one skeleton with a skull are known; the latter is the genus' most complete specimen. "Catopsbaatar" was a member of the family Djadochtatheriidae.
Patagosaurus
"Patagosaurus" was uncovered in the Middle Jurassic Cañadon Asfalto Formation, which preserves a large variety of flora and fauna. In fact, Escapa "et al." noted that "the fossil record of this formation represents the most completely known biota from the continental Middle to Late Jurassic of the Southern Hemisphere and one of the most complete of the entire world". The Cañadon Asfalto Formation, which was deposited about 165 to 161 million years ago, was a lush ecosystem, in which many organisms lived. In the Middle Jurassic, the region would have been part of the great southern landmass of Gondwana. Most of the plants are conifers, although ferns and equisetales are also abundant. Directly below the formation is a layer of ash, indicating a nearby volcano.