The palynological assemblage from Wulaga dinosaur site in Jiayin from southeastern Zeya-Bureya Basin was studied. The high content of pteridophytes spores is characteristic for this assemblage. The further characters ...The palynological assemblage from Wulaga dinosaur site in Jiayin from southeastern Zeya-Bureya Basin was studied. The high content of pteridophytes spores is characteristic for this assemblage. The further characters are in decrease of abundance-tricolpate pollen, Ginkgocycadophytus, pollen of Taxodiaceae, Cupressaceae and Taxaceae (TCT), bisaccate pollen of Pinaceae, and triporate pollen. The bone-bearing burials of Wulaga dinosaur site formed under conditions of vast swampy river valley covered by ferns and taxodialeans. Tricolpate pollen, produced by plants, close to those of Platanaceae, Fagaceae, Betulaceae, and Juglandaceae, counts in favor of valley river open canopy forests.展开更多
Abundant dinosaur remains have been discovered from the Heilongjiang/Amur area for over one hundred years.Among these discoveries,an isolated small theropod tooth recently found from the lower part of the Yuliangzi Fo...Abundant dinosaur remains have been discovered from the Heilongjiang/Amur area for over one hundred years.Among these discoveries,an isolated small theropod tooth recently found from the lower part of the Yuliangzi Formation of Jiayin displays highly distinctive morphological features.It can be identified as a Troodon-morphotype tooth based on mesiodistal constriction at the base of the crown and large,hook-like denticles extending the entire length of both carinae.Previously,Troodon remains were mainly found in North America.Some isolated Troodon teeth were also discovered in Blagoveschensk and Kundur localities on the left bank of the Heilongjiang river.This specimen represents the first occurrence of Troodon-morphotype tooth in Jiayin,Heilongjiang,Northeast China.The presence of this taxon in Jiayin,Blagoveschensk and Kundur localities in the Heilongjiang area provides new evidence for faunal exchange between North America and Asia through Cretaceous Beringia.展开更多
基金Supported by project"111" of China (No.B06008)supported by Far East Branch of Russian Academy of Sciences(grants 06-Ⅲ-A-06-141, 09-1-P15-02) Russian Foundation for basic researches (grant 07-05-00168)
文摘The palynological assemblage from Wulaga dinosaur site in Jiayin from southeastern Zeya-Bureya Basin was studied. The high content of pteridophytes spores is characteristic for this assemblage. The further characters are in decrease of abundance-tricolpate pollen, Ginkgocycadophytus, pollen of Taxodiaceae, Cupressaceae and Taxaceae (TCT), bisaccate pollen of Pinaceae, and triporate pollen. The bone-bearing burials of Wulaga dinosaur site formed under conditions of vast swampy river valley covered by ferns and taxodialeans. Tricolpate pollen, produced by plants, close to those of Platanaceae, Fagaceae, Betulaceae, and Juglandaceae, counts in favor of valley river open canopy forests.
基金Supported by National Nature Science Foundation of China(No.41202012).
文摘Abundant dinosaur remains have been discovered from the Heilongjiang/Amur area for over one hundred years.Among these discoveries,an isolated small theropod tooth recently found from the lower part of the Yuliangzi Formation of Jiayin displays highly distinctive morphological features.It can be identified as a Troodon-morphotype tooth based on mesiodistal constriction at the base of the crown and large,hook-like denticles extending the entire length of both carinae.Previously,Troodon remains were mainly found in North America.Some isolated Troodon teeth were also discovered in Blagoveschensk and Kundur localities on the left bank of the Heilongjiang river.This specimen represents the first occurrence of Troodon-morphotype tooth in Jiayin,Heilongjiang,Northeast China.The presence of this taxon in Jiayin,Blagoveschensk and Kundur localities in the Heilongjiang area provides new evidence for faunal exchange between North America and Asia through Cretaceous Beringia.
