Gaositai railway station, Chengde City: Late/Upper Barremian, China

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Insecta - Orthoptera - Prophalangopsidae
Habrohagla curtivenata n. gen., n. sp. Ren 1995
1 specimen
synonym of Parahagla sibirica
(1 measurement)
Insecta - Orthoptera - Haglidae
Sinohagla pleioneura n. sp. Ren 1995
1 specimen
(1 measurement)
Insecta - Blattodea - Blattulidae
Blattula extenuata n. sp. Ren 1995
1 specimen
recombined as Elisama extenuata
(1 measurement)
Blattula delicatula n. sp. Ren 1995
1 specimen
(1 measurement)
Blattula platypa n. sp. Ren 1995
1 specimen
(1 measurement)
Insecta - Hemiptera - Palaeontinidae
Yanocossus guoi n. gen., n. sp. Ren 1995
1 specimen
(1 measurement)
Insecta - Hemiptera - Oviparosiphidae
Sinoviparosiphum lini n. gen., n. sp. Ren 1995
4 specimens
(1 measurement)
Insecta - Hymenoptera - Xyelidae
Liadoxyela chengdeensis n. sp. Ren 1995
1 specimen
recombined as Angaridyela chengdeensis
(1 measurement)
Insecta - Hymenoptera - Megalyridae
Mesaulacinus rasnitsyni n. sp. Ren 1995
1 specimen
(2 measurements)
Scolichneumon rectivenius n. gen., n. sp. Ren 1995
1 specimen
(2 measurements)
Yanocleistogaster canaliculata n. gen., n. sp. Ren 1995
1 specimen
(2 measurements)
Insecta - Hymenoptera - Baissidae
Manlaya flexuosa n. sp. Ren 1995
2 specimens
(2 measurements)
Insecta - Hymenoptera - Proctotrupidae
Chengdeserphus petiolatus n. gen., n. sp. Ren 1995
1 specimen
(2 measurements)
Insecta - Hymenoptera - Roproniidae
Jeholoropronia pingi n. gen., n. sp. Ren 1995
1 specimen
(2 measurements)
Insecta - Hymenoptera - Bethylonymidae
Allogaster ovata n. gen., n. sp. Ren 1995
1 specimen
(2 measurements)
Insecta - Hymenoptera - Angarosphecidae
Baissodes grabaui n. sp. Ren 1995
1 specimen
(2 measurements)
Insecta - Hymenoptera - Megalodontesidae
Sinosepulca gigathoracalis n. gen., n. sp. Ren 1995
1 specimen
(1 measurement)
Insecta - Mecoptera - Permochoristidae
Yanorthophlebia hebeiensis n. gen., n. sp. Ren 1995
1 specimen
recombined as Liassochorista hebeiensis
(1 measurement)
Insecta - Trichoptera - Vitimotauliidae
Multimodus stigmaeus n. sp. Ren 1995
1 specimen
(1 measurement)
? Multimodus elongatus n. sp. Ren 1995
1 specimen
(1 measurement)
Multimodus dissitus n. sp. Ren 1995
1 specimen
(1 measurement)
Insecta - Raphidioptera - Mesoraphidiidae
Yanoraphidia gaoi n. gen., n. sp. Ren 1995
1 specimen
(1 measurement)
Insecta - Neuroptera
Yanosmylus rarivenatus n. gen., n. sp. Ren 1995
1 specimen
(1 measurement)
Insecta - Diptera - Empididae
Basilorhagio venustus n. gen., n. sp. Ren 1995
1 specimen
(1 measurement)
Insecta - Diptera - Mycetophilidae
Atalosciophila yanensis n. gen., n. sp. Ren 1995
1 specimen
(2 measurements)
Insecta - Diptera - Pleciofungivoridae
Opiparifungivora aliena n. gen., n. sp. Ren 1995
1 specimen
(1 measurement)
Insecta - Diptera - Bibionidae
Lichnoplecia kovalevi n. gen., n. sp. Ren 1995
3 specimens
(3 measurements)
see common names

Geography
Country:China State/province:Hebei
Coordinates: 41.2° North, 118.0° East (view map)
Paleocoordinates:43.3° North, 120.1° East
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Cretaceous Epoch:Early/Lower Cretaceous
Stage:Barremian 10 m.y. bin:Cretaceous 2
Key time interval:Late/Upper Barremian
Age range of interval:130.00000 - 125.45000 m.y. ago
Stratigraphy
Geological group:Jehol Formation:Yixian
Stratigraphic resolution:group of beds
Stratigraphy comments: The Yixian Formation can be subdivided into five units, in ascending order, Lujiatun unit, Lower Lava, Jianshangou unit, Upper Lava, Dawangzhangzi unit, Jingangshan unit, and Huanghuashan unit. Most of the Jehol fossils from the Yixian Formation are preserved in four beds, that is, the Lujiatun bed (recalculated age is 124.0 ± 1.0/1.3 Ma, He et al., 2006), the Jianshangou bed (125.43 ± 0.50/0.88 Ma, Swisher et al., 1999), the Dawangzhangzi bed, and Jinggangshan bed (~122 Ma, Smith et al., 1995).U-Pb dating suggests that the Huangbanjigou section 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.
He et al. (2004) reported a 40Ar/39Ar age of 120.3 ± 0.7 Ma for a tuff layer in the lower part of the Jiufotang Formation, and Chang et al. (2009) obtained a 40Ar/39Ar age of 122.1 ± 0.3 Ma for a tuff layer from the lowermost part of the Jiufotang Formation. Yu et al. (2021) dated an ash bed just above the Yixian/Jiufotang formation boundary to 122.0 ± 0.9 Ma and three tuff beds from the Xiaotaizi section to 118.9 ± 0.8 Ma, 118.8 ± 0.6 Ma, and 118.6 ± 1.1 Ma. These ages suggest that the Jiufotang Formation in Jianchang Basin was deposited at ca. 122.0–118.9 Ma.
Olierrok et al. (2019) used a selection of U-Pb and 40Ar-39Ar geochronology to place the Barremian–Aptian boundary (the base of the Chron M0r) between 123.8 and 121.8 Ma. The GTS 2020 uses an age of 121.4 Ma for the base of the Aptian, and multiproxy orbital tuning gives an age of 120.2 Ma for the Barremian-Aptian boundary (Leandro et al., 2022). Therefore, the Yixian Formation should be entirely Late Barremian, with the Jiufotang Formation deposited in the Early Aptian (or latest Barremian at its base).
Lithology and environment
Primary lithology: lithified mudstone
Environment:lacustrine - large Tectonic setting:rift
Taphonomy
Modes of preservation:mold/impression
Size of fossils:mesofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:taxonomic analysis
Metadata
Database number:107001
Authorizer:M. Clapham Enterer:M. Clapham
Modifier:M. Clapham Research group:paleoentomology
Created:2011-03-31 03:44:32 Last modified:2023-07-19 22:58:01
Access level:the public Released:2011-03-31 03:44:32
Creative Commons license:CC BY
Reference information

Primary reference:

35672. D. Ren. 1995. Insecta. In D. Ren, L.W. Lu, Z.G. Guo, S.A. Ji (eds.), Faunae and stratigraphy of Jurassic-Cretaceous in Beijing and the adjacent areas 47-121 [M. Clapham/M. Clapham]