Riabininohadros

Riabininohadros (meaning "Riabinin's hadrosaur") is an extinct genus of ankylopollexian dinosaur from the Maastrichtian of Crimea. Its type species is Riabininohadros weberi, emended to Riabininohadros weberae. It was originally classified as a species of Orthomerus, until 2015.

==Discovery and history== thumb|left|Restored as a hadrosaur It was originally named Orthomerus weberi when first described by Anatoly Nikolaevich Riabinin in 1945 for hindlimb elements from an unnamed Maastrichtian-age formation in Crimea of what is now Ukraine. These were in 1934 near Bakhchysarai found by Gertruda Weber who is honoured in the specific name. The find was in 1937 reported in the scientific literature. As Weber was female, Lev Nesov in 1995 emended the name to Orthomerus weberae so the ending of the species name was also feminine. Although tossed as a nomen dubium in recent reviews of Hadrosauridae, it was informally given its own genus "Riabininohadros" by Russian amateur paleontologist Roman Ulansky. As this publication did not meet the requirements of the International Code of Zoological Nomenclature, "Riabininohadros" was not a valid name for the taxon until the name was formally published as new by Lopatin and Averianov in 2020.