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Global Geology 2022, 25(3) 133-145 DOI:
ISSN: 1673-9736 CN: 22-1371/P |
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The first occurrence of Troodon-morphotype tooth in Jiayin, Heilongjiang, Northeast China |
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The first occurrence of Troodon-morphotype tooth in Jiayin, Heilongjiang, Northeast China |
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YU Kaifeng1, WU Wenhao2*, Ivan Bolotsky3, ZHANG Xin4, SHEN Fengbin4and Pascal Godefroit5 |
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1. College of Earth Sciences, Jilin University, Changchun 130061, China;
2. Research Centre of Palaeontology and Stratigraphy, Jilin University, Changchun 130026, China;
3. Institute of Geology and Nature Management, FEB RAS, Blagoveschensk 675000, Russia;
4. Jiayin Dinosaur National Geopark, Jiayin 153200, China;
5. Directorate Earth and History of Life, Royal Belgian Institute of Natural Sciences, 1000 Brussels, Belgium |
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Abstract:
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. |
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Keywords:
Heilongjiang
Yuliangzi Formation
Theropoda
Troodon
Maastrichtian
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