Sihetun (NIGP coll): Early/Lower Aptian, China

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Insecta - Hemiptera - Palaeontinidae
Ilerdocossus hui (Ren et al. 1998)
Li et al. 2018 1 specimen
NIGP 154994
Insecta - Odonata - Megapodagrionidae
Cretapodagrion sibelleae n. gen., n. sp. Huang et al. 2017
1 specimen
NIGP 166620
see common names

Geography
Country:China State/province:Liaoning
Coordinates: 41.6° North, 120.8° East (view map)
Paleocoordinates:44.5° North, 122.3° East
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Cretaceous Epoch:Early/Lower Cretaceous
Stage:Aptian 10 m.y. bin:Cretaceous 3
Key time interval:Early/Lower Aptian
Age range of interval:125.45000 - 122.46000 m.y. ago
Stratigraphy
Formation:Yixian
Stratigraphic resolution:group of beds
Stratigraphy comments: U-Pb dating from the Sihetun area indicates that the Yixian Formation ranges from 124.9 ± 1.7 Ma to 122.8 ± 1.6 Ma (Yang et al., 2007). Chang et al. (2017) obtained Ar/Ar ages of 125.8 ± 1.0 Ma and 126.0 ± 0.8 Ma from the Lujiatun Unit, the lowest part of the Yixian Formation, below the lacustrine shales. It is not clear if the formation is the same age elsewhere, but for now the same age is assigned.
Lithology and environment
Primary lithology: lithified mudstone
Environment:lacustrine - large Tectonic setting:rift
Taphonomy
Modes of preservation:adpression
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Museum repositories:NIGPAS
Metadata
Database number:190928
Authorizer:M. Clapham Enterer:M. Clapham
Research group:paleoentomology
Created:2017-12-22 12:12:18 Last modified:2017-12-22 12:12:18
Access level:the public Released:2017-12-22 12:12:18
Creative Commons license:CC BY
Reference information

Primary reference:

64213. D. Y. Huang, D. Azar, and A. Nel. 2017. The oldest 'Megapodagrionidae' (Odonata, Zygoptera) discovered in the Lower Cretaceous Yixian Formation, China. Cretaceous Research 84:426-430 [M. Clapham/M. Clapham]

Secondary references:

67520 Y. L. Li, J. Chen, and B. Wang. 2018. New Cretaceous palaeontinids (Insecta, Hemiptera) from northeast China. Cretaceous Research 95:130-137 [M. Clapham/M. Clapham]