Near Chaomidian Village (GMC Beijing coll): Late/Upper Barremian, China

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Insecta - Odonata - Corduliidae
Mesocordulia boreala n. gen., n. sp. Ren and Guo 1996
Ren and Guo 1996 2 specimens
LB94021, LB94022 (4 measurements)
Insecta - Odonata - Gomphidae
Liogomphus yixianensis n. gen., n. sp. Ren and Guo 1996
Ren and Guo 1996 1 specimen
LB94020 (2 measurements)
Insecta - Odonata - Rudiaeschnidae
Rudiaeschna limnobia n. gen., n. sp. Ren and Guo 1996
Ren and Guo 1996 2 specimens
LB94010, 94011 (6 measurements)
Insecta - Odonata - Liassogomphidae
Chrysogomphus beipiaoensis n. gen., n. sp. Ren 1994
Ren 1994 1 specimen
LB92020 (1 measurement)
Insecta - Raphidioptera - Mesoraphidiidae
Archeraphidia polyphlebia n. sp. Ren 1994
Ren 1994 1 specimen
recombined as Mesoraphidia polyphlebia
Sh016(017) (1 measurement)
Archeraphidia shangyuanensis n. sp. Ren 1994
Ren 1994 1 specimen
recombined as Mesoraphidia shangyuanensis
Sh015 (1 measurement)
Alloraphidia longistigmosa n. sp. Ren 1994
Ren 1994 1 specimen
recombined as Mesoraphidia longistigmosa
Sh004 (2 measurements)
Alloraphidia obliquivenatica n. sp. Ren 1994
Ren 1994 7 specimens
recombined as Stenoraphidia obliquivenatica
Sh006, 005, 007, 008, 009, 010, 011 (2 measurements)
Liaoraphidia fornicata n. gen., n. sp. Ren 1994
Ren 1994 1 specimen
recombined as Siboptera fornicata
Sh003 (2 measurements)
Insecta - Raphidioptera - Baissopteridae
Baissoptera liaoningensis n. sp. Ren 1994
Ren 1994 1 specimen
Sh001(002) (2 measurements)
Insecta - Neuroptera - Berothidae
Oloberotha sinica n. gen., n. sp. Ren and Guo 1996
Ren and Guo 1996 1 specimen
LB95007(8) (2 measurements)
Insecta - Neuroptera - Ithonidae
Lasiosmylus newi n. gen., n. sp. Ren and Guo 1996
Ren and Guo 1996 1 specimen
LB95006 (2 measurements)
Insecta - Neuroptera - Myrmeleontidae
Choromyrmeleon othneius n. gen., n. sp. Ren and Guo 1996
Ren and Guo 1996 1 specimen
LB95013(4) (1 measurement)
Insecta - Neuroptera - Kalligrammatidae
Kalligramma liaoningensis n. sp. Ren and Guo 1996
Ren and Guo 1996 1 specimen
corrected as Kalligramma liaoningense
LB95004(5) (1 measurement)
Sophogramma papilionacea n. gen., n. sp. Ren and Guo 1996
Ren and Guo 1996 1 specimen
LB95001 (1 measurement)
Sophogramma eucalla n. sp. Ren and Guo 1996
Ren and Guo 1996 1 specimen
LB95002(3) (1 measurement)
Sophogramma plecophlebia n. sp. Ren and Guo 1996
Ren and Guo 1996 1 specimen
LB95009 (1 measurement)
Insecta - Neuroptera - Chrysopidae
Lembochrysa miniscula n. gen., n. sp. Ren and Guo 1996
Ren and Guo 1996 1 specimen
recombined as Mesypochrysa miniscula
LB95010 (1 measurement)
Lembochrysa polyneura n. sp. Ren and Guo 1996
Ren and Guo 1996 1 specimen
recombined as Mesypochrysa polyneura
LB95012 (1 measurement)
Insecta - Neuroptera - Mesochrysopidae
Mesascalaphus yangi n. gen., n. sp. Ren 1995
1 specimen
LB93003 (3 measurements)
Insecta - Mecoptera - Orthophlebiidae
Orthophlebia liaoningensis n. sp. Ren 1997
Ren 1997 6 specimens
LB95055(6), 95057, 95058, 95059, 95060, 95061 (1 measurement)
Insecta - Mecoptera - Bittacidae
Sibirobittacus atalus n. sp. Ren 1997
Ren 1997 2 specimens
LB95052(3), 95054(5) (2 measurements)
Megabittacus beipiaoensis n. sp. Ren 1997
Ren 1997 1 specimen
LB95051 (1 measurement)
Megabittacus colosseus n. gen., n. sp. Ren 1997
Ren 1997 1 specimen
LB95050 (2 measurements)
Insecta - Hemiptera - Lalacidae
Lapicixius decorus n. gen., n. sp. Ren et al. 1998
Ren et al. 1998 10 specimens
LB97152(3), 97150(1), 97154, 97155(6), 97157, 97158(9), 97160, 97161(2), 97163, 97164 (7 measurements)
Insecta - Hemiptera - Procercopidae
Anthoscytina aphthosa n. sp. Ren et al. 1998
Ren et al. 1998 15 specimens
recombined as Stellularis aphthosa
LB97202, 97201, 97203-97205, 97207-97216 (5 measurements)
Anomoscytina anomala n. gen., n. sp. Ren et al. 1998
Ren et al. 1998 1 specimen
LB97206
Insecta - Hemiptera - Palaeontinidae
Liaocossus hui n. gen., n. sp. Ren et al. 1998
Ren et al. 1998 1 specimen
recombined as Ilerdocossus hui
LB97104 (2 measurements)
Liaocossus exiguus n. gen., n. sp. Ren et al. 1998
Ren et al. 1998 1 specimen
recombined as Ilerdocossus exiguus
LB97103 (1 measurement)
Liaocossus beipiaoensis n. gen., n. sp. Ren et al. 1998
Ren et al. 1998 1 specimen
recombined as Ilerdocossus beipiaoensis
LB97101 (1 measurement)
Miracossus ingentius n. gen., n. sp. Ren et al. 1998
Ren et al. 1998 1 specimen
LB97106 (2 measurements)
Insecta - Susumaniidae
Hagiphasma paradoxa n. gen., n. sp. Ren 1997
Ren 1997 1 specimen
LB96001(2) (2 measurements)
Hagiphasmatidae indet. Ren 1997
Ren 1997 1 specimen
synonym of Susumaniinae
LB96003
Insecta - Orthoptera - Elcanidae
Liaonemobius tanae n. gen., n. sp. Ren 1998
Ren 1998 2 specimens
LB97301(2), 97303 (1 measurement)
Insecta - Blattodea - Mesoblattinidae
Nipponoblatta acerba n. sp. Ren 1995
1 specimen
LB93003 (1 measurement)
Insecta - Diptera - Archisargidae
Pauromyia oresbia n. gen., n. sp. Ren 1998
Ren 1998 1 specimen
recombined as Sharasargus oresbius
LB97022 (2 measurements)
Helempis yixianensis n. gen., n. sp. Ren 1998
Ren 1998 1 specimen
recombined as Ovisargus (Helempis) yixianensis
LB97024 (2 measurements)
Helempis eucalla n. sp. Ren 1998
Ren 1998 1 specimen
recombined as Ovisargus eucalla
LB97025 (2 measurements)
Allomyia ruderalis n. gen., n. sp. Ren 1998
Ren 1998 1 specimen
recombined as Sinallomyia ruderalis
LB97020 (2 measurements)
Insecta - Diptera - Eremochaetidae
Alleremonomus xingi n. gen., n. sp. Ren and Guo 1995
Ren and Guo 1995 2 specimens
LB94001, LB94002 (5 measurements)
Alleremonomus liaoningensis n. sp. Ren and Guo 1995
Ren and Guo 1995 1 specimen
synonym of Alleremonomus xingi
LB94003 (5 measurements)
Lepteremochaetus lithoecius n. gen., n. sp. Ren 1998
Ren 1998 1 specimen
LB97023 (1 measurement)
Insecta - Diptera - Tabanidae
Eopangonius pletus n. gen., n. sp. Ren 1998
Ren 1998 1 specimen
LB97019 (2 measurements)
Insecta - Diptera
Palaepangonius eupterus n. gen., n. sp. Ren 1998
Ren 1998 1 specimen
LB97017/8 (2 measurements)
Insecta - Diptera - Rhagionidae
Oiobrachyceron limnogenus n. gen., n. sp. Ren 1998
Ren 1998 1 specimen
LB97016 (2 measurements)
Orsobrachyceron chinensis n. gen., n. sp. Ren 1998
Ren 1998 1 specimen
LB97015 (2 measurements)
Insecta - Diptera - Nemestrinidae
Florinemestrius pulcherrimus n. gen., n. sp. Ren 1998
Ren 1998 2 specimens
LB97008/9, 97011 (2 measurements)
Protonemestrius beipiaoensis n. sp. Ren 1998
Ren 1998 3 specimens
LB97013, 97012, 97014 (2 measurements)
Protonemestrius jurassicus n. sp. Ren 1998
Ren 1998 1 specimen
LB97005 (2 measurements)
Insecta - Diptera - Empididae
Protempis minuta n. sp. Ren 1998
Ren 1998 1 specimen
LB97021 (2 measurements)
Insecta - Diptera - Protapioceridae
Protapiocera ischyra n. sp. Ren 1998
Ren 1998 1 specimen
LB97003 (2 measurements)
Protapiocera megista n. gen., n. sp. Ren 1998
Ren 1998 1 specimen
LB97001/2 (2 measurements)
unclassified
Sinaeschnidia cancellosa n. sp. Ren 1995
4 specimens
synonym of Sinaeschnidia heishankowense
LB93005 (2 measurements)
see common names

Geography
Country:China State/province:Liaoning
Coordinates: 41.6° North, 120.8° East (view map)
Paleocoordinates:44.1° North, 122.9° East
Basis of coordinate:estimated from map
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:tuffaceous lithified mudstone
Environment:lacustrine - large Tectonic setting:rift
Taphonomy
Modes of preservation:adpression
Lagerst�tten type:conservation
Size of fossils:macrofossils,mesofossils
Preservation of anatomical detail:good
Collection methods and comments
Reason for describing collection:taxonomic analysis
Collection method comments: Repository: Geological Museum of China, Beijing
Metadata
Database number:138436
Authorizer:M. Clapham Enterer:M. Clapham, J. Karr
Modifier:M. Clapham Research group:paleoentomology
Created:2013-01-18 13:06:54 Last modified:2023-07-19 23:01:12
Access level:the public Released:2013-01-18 13:06:54
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]

Secondary references:

51316 D. Ren. 1994. A new discovery of snake-flies (Insecta) from Late Jurassic of Beipiao, Liaoning. Professional Papers of Stratigraphy and Palaeontology 25:131-140 [M. Clapham/M. Clapham]
35433 D. Ren. 1994. A new genera and species of Liassogomphidae (Insecta, Odonata) from Late Jurassic of Liaoning Province, China. Geosciences 8(3):254-258 [M. Clapham/J. Karr/J. Karr]
51653 D. Ren. 1997. First record of fossil stick-insects from China (Phasmatodea: Hagiphasmatidae fam. nov.) with analysis of some palaeobiological features. Acta Zootaxonomica Sinica 22:268-281 [M. Clapham/M. Clapham/M. Clapham]
51218 D. Ren. 1997. Studies on Late Jurassic scorpion-flies from northeast China (Mecoptera: Bittacidae, Orthophlebiidae). Acta Zootaxonomica Sinica 22:75-85 [M. Clapham/M. Clapham]
44333 D. Ren. 1998. Late Jurassic Brachycera from northeastern China (Insecta: Diptera). Acta Zootaxonomica Sinica 23:65-82 [M. Clapham/M. Clapham]
48735 D. Ren. 1998. First record of fossil crickets (Orthoptera: Trigonidiidae) from China. Entomologica Sinica 5:101-105 [M. Clapham/M. Clapham]
46372 D. Ren and Z. Guo. 1995. A new genus and two new species of short-horned flies of Upper Jurassic from Northeast China (Diptera: Eremochaetidae). Entomologica Sinica 2(4):300-307 [M. Clapham/J. Karr/M. Clapham]
35443 D. Ren and Z. Guo. 1996. Three new genera and three new species of dragonflies from the late Jurassic of Northeast China. Entomologica Sinica 3(2):95-105 [M. Clapham/J. Karr]
51217 D. Ren and Z. G. Guo. 1996. On the new fossil genera and species of Neuroptera (Insecta) from the Late Jurassic of northeast China. Acta Zootaxonomica Sinica 21:461-479 [M. Clapham/M. Clapham]
51216 D. Ren, J. C. Yin, and W. X. Dou. 1998. New planthoppers and froghoppers from the Late Jurassic of northeast China (Homoptera: Auchenorrhyncha). Acta Zootaxonomica Sinica 23:281-288 [M. Clapham/M. Clapham]
38220 D. Ren, J. Yin, and W. Dou. 1998. Late Jurassic Palaeontinids (Homoptera; Auchenorrhyncha) from Hebei and Liaoning Provinces in China. Entomologia Sinica 5(3):222-232 [M. Clapham/J. Karr]