Шаблон:Short descriptionШаблон:Automatic taxoboxAbdarainurus (meaning "Abdrant Nuru tail" after the holotype locality) is a genus of titanosaurdinosaur from the Alagteeg Formation in Mongolia. The type and only species is A. barsboldi. Currently seen as an indeterminate titanosaur, it may represent a previously unknown lineage of Asianmacronarians.[1]Abdarainurus is not known from many remains; it is only known from eight front tail vertebrae and a middle tail vertebra and several chevrons.
The holotype, PIN 5669/1, was discovered in 1970 in Abdrant Nuru, hence the genus name, during a Joint Soviet–Mongolian Paleontological expedition and was excavated by V. P. Tverdokhlebov of Saratov State University. The fossils were left unprepared until at least 2000, when paleontologist Andrei Podlesnow revealed that they probably belonged to a new genus of sauropod.[2] The species Abdarainurus barsboldi was named in February 2020.[1]
Abdarainurus was added to the phylogenetic analysis of Mannion and colleagues by Averianov and Lopatin, who ran the matrix under three different conditions. With all characters treated as equally important, Abdarainurus resolved as a non-titanosaur member of Somphospondyli, in a large polytomy with a variety of taxa. The more labile characters treated as slightly, or significantly, less important, Abdarainurus was either a basal titanosaur in a clade with Andesaurus and Huabeisaurus or as a member of Aeolosaurinae, respectively. As Abdarainurus was resolved with the fewest unique features as a basal titanosaur, Averianov and Lopatin suggested that phylogenetic result was the most likely, shown below.[1]
