(Amur lizard - after the Amur River).
Named By: Yuri Bolotsky and Sergei Kurzanov - 1991.
Classification: Chordata, Reptilia, Dinosauria, Ornithischia, Ornithopoda, Lambeosaurinae, Hadrosauridae.
Species: A. riabinini (type).
Size: At least 6 meters long, maybe more.
Known locations: Russia - Udurchukan Formation.
Time period: Late Maastrichtian of the Cretaceous.
Fossil representation: Remains of many individuals though these are mostly preserved in a bone bed of remains.
has been based only upon very partial remains, though these were
taken from a bonebed of multiple dinosaurs, and further remains are
likely to be in there somewhere. Slowly the picture of a
(the kind with a hollow crest) has been
pieced together with an appearance similar to that of the earlier
from North America. One of the most interesting things
about Amurosaurus is that once again we can see a
hadrosaurid living in Asia near the end of the Cretaceous at a time
when they seem to have largely vanished from North America (instead
solid to no crested saurolophine hadrosaurid were predominant
here). This might actually correspond with one theory where the
lambeosaurines are surmised to have evolved in Asia and then crossed
over to North America via a land bridge.
The bone bed where fossils of Amurosaurus were found also has the remains of another hadrosaurid called Kerberosaurus alongside them. Many of these bones also bear the tooth marks of various theropod dinosaurs, though at this stage it is only evidence of feeding. They do not yet reveal if the dinosaurs had been killed or just scavenged by meat eaters. Another hadrosaurid discovered near the Amur River, though this time on the Chinese side is Charonosaurus. Predators of Amurosaurus may have included Asian genera of tyrannosaurs such as Tarbosaurus.
- [The hadrosaurs of the Amur Region.], Y. L. Bolotsky & S. K. Kurzanov - 1991.
- The lambeosaurine dinosaur Amurosaurus riabinini, from the Maastrichtian of Far Eastern Russia, P. Godefroit, Y. L. Bolotsky & J. Van Itterbeeck - 2004.
- Recent advances on study of hadrosaurid dinosaurs in Heilongjiang (Amur) River area between China and Russia, P. Godefroit, P. Lauters, J. Van Itterbeeck, Y. Bolotsky & I. Y. Bolotsky - 2011.