Before the first dinosaurs were unearthed in India, the Russian paleontologist G. D. Romonovk ( 1820) found dinosaur tracks in Central Asia at the junction of the Gissar and Zeravshan Ridges on the right bank of the Yagnob river. It appears that these dinosaur tracks together with the bones from India represent the only dinosaur records made in Asia during the 19th century.
In 1902, a Russian colonel, by the name of Manakin, was given a few fossils of a large animal by a fisherman from the south bank of Heilongjiang River ( Black Dragon River in Chinese ) . He believed that these bones belonged to a Siberian mammoth and reported the discovery in (The Bulletin of the Coastal Area of Amur} Subsequently, the report attracted attention of paleontologists in St. Petersburg. As a consequence, the Russian Geological Committee sent B.X. Rengarten, animatronic dinosaur for sale a geologist, to investigate the area in 1915 through 1917, who find the site where fossils came from.He found bones scattered along the side of the riverbed, and organized new excavation with N.P. Stepanov.After fieldwork was completed in 1917, all fossils discovered were transported to St. Petersburg.
After the October Revolution, A. N. Riabinin ( 1925, 1930 ) studied the fossil bones and found that some of them belong to a new hadrosaur, Mandschuros amurensis, while other remains included theropod teeth.A single skeleton of the hadrosaur was restored from hones of several individuals, and this composite skeleton is now on display at the Central Geological Museum in St.Petersburg. The restoration was incorrect due to incomplete nature of the remains and absence of any comparable findings.