Russia is a country in Europe and Asia. It is known for remains of several dinosaurs, including Olorotitan, Psittacosaurus, and Velociraptor. Remains of sea-going reptiles (including ichthyosaurs and metriorhynchids), pterosaurs (such as Volgadraco), ammonites, ancient crocodilians, mammal-like reptiles such as Inostrancevia and Biarmosuchus, and huge mammoths with 10-foot long tusks.