Plants
Archosauromorphs Dinosaurs NameNoveltyStatusAuthorsAgeType localityLocationNotesImages Saurolophus angustirostris Sp. nov. Valid Rozhdestvensky Maastrichtian Nemegt Formation A species of Saurolophus Syrmosaurus viminocaudus Gen. et sp. nov. Jr. synonym Maleev Campanian Djadochta Formation Junior synonym of Pinacosaurus Talarurus plicatospineus Gen. et sp. nov. Valid Maleev Cenomanian-Santonian Bayan Shireh Formation An ankylosaurid
Plesiosaurs
New taxa Name Novelty Status Authors Age Unit Location Notes Images Alzadasaurus kansasensisSp nov jr synonym Welles Late Cretaceous Early CampanianNiobrara FormationA long-necked elasmosaurid plesiosaur. Synonymized with Styxosaurus snowii in 1999Styxosaurus browniSp nov valid Welles Late Cretaceous Early CampanianPierre ShaleA long-necked elasmosaurid plesiosaur. Synonymized with Hydralmosaurus serpentinus in 1999 Removed from synonymy in 2016 References