LATEST CRETACEOUS HADROSAURID DINOSAURS FROM HEILONGJIANG PROVINCE (P. R. CHINA) AND AMUR REGION (FAR EASTERN RUSSIA)
Four main dinosaur-bearing sites have been investigated in latest Cretaceous deposits from the Amur/Heilongjiang region: Jiayin and Wulaga in China (Yuliangze Formation), Blagoveschensk and Kundur in Russia (Udurchukan Formation). More than 90％ of the bones discovered in these localities belong to hollow-crested lambeosaurine hadrosaurids: Charonosaurus jiayinensis at Jiayin, Amurosaurus riabinini at Blagoveschensk, Olorotitan arharensis at Kundur, and a new genus at Wulaga. Flat-headed hadrosaurine hadrosaurids are much less numerous, but appear well diversified as well: Kerberosaurus manakini at Blagoveschensk and two new genera at Kundur and Wulaga respectively. Theropods are represented by shed teeth and isolated bones; isolated scutes and teeth discovered at Kundur are tentatively attributed to nodosaurid dinosaurs. Palynological studies suggest that the dinosaur sites from the Amur/Heilongjiang region are probably synchronous with the Lancian vertebrate localities of western North America, which represent the youngest dinosaur faunas in this area. However, the latest Cretaceous dinosaur assemblages are completely different in the Amur/Heilongjiang region (lambeosaurines abundant, ceratopsids absent) and in western North America (ceratopsids abundant, lambeosaurines extremely rare or absent). This probably reflects some kind of geographical barrier between both areas by Maastrichtian time rather than strong differences in palaeoecological conditions.
Pascal Godefroit
Royal Belgian Institute of Natural Sciences, Department of Palaeontology, Rue Vautier 29, 1000 Brussels, Belgium, pascal.
国际会议
2005·河源国际恐龙学术研讨会(2005 Heyuan International Dinosaur Symposium)
广东河源
英文
103-114
2005-04-08（万方平台首次上网日期，不代表论文的发表时间）