Where: Liaoning, China (41.6° N, 120.8° E: paleocoordinates 44.1° N, 122.9° E)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Yixian Formation (Jehol Group), Late/Upper Barremian (130.0 - 125.5 Ma)
• 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).
• group of beds-level stratigraphic resolution
Environment/lithology: lacustrine - large; lithified, tuffaceous mudstone
Size classes: macrofossils, mesofossils
Preservation: adpression
Collection methods: Repository: Capital Normal University, Beijing
Primary reference: T. T. Wang, D. Ren, J. H. Liang and C. K. Shih. 2007. New Mesozoic cockroaches (Blattaria: Blattulidae) from Jehol Biota of western Liaoning in China. Annales Zoologici 57:483-495 [M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 111710: authorized by Matthew Clapham, entered by Matthew Clapham on 28.06.2011, edited by Jered Karr
Creative Commons license: CC BY (attribution)
Taxonomic list
Insecta | |
Megapelecinus changi n. gen. n. sp.17, Megapelecinus nashi n. sp.17, Azygopelecinus clavatus n. gen. n. sp.7, Sinopelecinus viriosus7, Eopelecinus huangi n. sp.11, Eopelecinus tumidus n. sp.11, Shoushida regilla n. gen. n. sp.14, Shoushida infera n. sp.9, Abropelecinus annulatus n. gen. n. sp.7
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"Brochocoleus sulcatus n. sp." = Odontomma sulcatum21, "Tetraphalerus latus n. sp." = Allophalerus latus20, "Brochocoleus angustus n. sp." = Pareuryomma angustum21, "Tetraphalerus curtinervis n. sp." = Monticupes curtinervis20
"Tetraphalerus curtinervis n. sp." = Monticupes curtinervis20 Tan et al. 2007 beetle CNU-C-LB2006006
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Lasiosyne integera n. sp.10
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Cretonanophyes punctatus n. sp.13, "Leptocar polychaetus n. gen. n. sp." = Montsecanomalus zherikhini13, Abrocar macilentus n. sp.13
"Leptocar polychaetus n. gen. n. sp." = Montsecanomalus zherikhini13 Liu and Ren 2006 weevil CNU-C-LB2006101
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Bellimordella longispina n. sp.15, Bellimordella robusta n. sp.15, Bellimordella capitulifera n. gen. n. sp.15, Mirimordella gracilicruralis n. gen. n. sp.12
Mirimordella gracilicruralis n. gen. n. sp.12 Liu et al. 2007 tumbling flower beetle CNU-C-LB2006201
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Cryptocoelus gianteus n. sp.3, Curtelater wui n. gen. n. sp.2, Paralithomerus parallelus n. sp.4, Paralithomerus exquisitus n. gen. n. sp.4, Bilineariselater foveatus n. gen. n. sp.2
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Forticatinius elegans n. gen. n. sp.18
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Venicoris solaris n. gen. n. sp.29, Halonatusivena nervosus n. sp.5, Halonatusivena shii n. gen. n. sp.5
Venicoris solaris n. gen. n. sp.29 Yao et al. 2012 true bug CNU-HE-LB2006526, 508, 509, 511-513, 515-525, 527-624, 626, 628, 630, 632, 634, 636, 638, 640, 642
Halonatusivena shii n. gen. n. sp.5 Du et al. 2016 true bug CNU-HE-LB2006354, 335-340, 342-344, 346, 349-353, 382, 384
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Breviscutum lunatum n. gen. n. sp.23, Oropentatoma epichara n. gen. n. sp.23, Primipentatoma peregrina n. gen. n. sp.23
Primipentatoma peregrina n. gen. n. sp.23 Yao et al. 2013 true bug CNU-HE-LB2006001-6,9,11-15,17-20,96,97,764,766,772,773,775,777
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Changirostrus maculatus n. gen. n. sp.6, Dehiscensicoris sanctus n. gen. n. sp.6, Crassiantenninus minutus n. gen. n. sp.6
Dehiscensicoris sanctus n. gen. n. sp.6 Du et al. 2016 true bug CNU-HE-LB2006152, 99/101/103/105/107/109/111/113/115/117/119/121/123/127-129/131-136/139-145/147-153/156/157/159-165/167/169-174/320-322
Crassiantenninus minutus n. gen. n. sp.6 Du et al. 2016 true bug CNU-HE-LB2006130, 125/135/146/154/155/323
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Beipiaocoris multifurcus n. gen. n. sp.27 Yao et al. 2008 true bug CNU-HE-LB2006193, 177-192, 194-196, 198-209, 211-262
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Mesolygaeus laiyangensis31, Propritergum opimum n. gen. n. sp.31, Luculentsalda maculosa n. gen. n. sp.32
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Collivetanthocoris rapax n. gen. n. sp.24, Byssoidecerus levigatus n. gen. n. sp.24, Vetanthocoris decorus n. gen. n. sp.24, Vetanthocoris longispicus24, Mecopodus xanthos n. gen. n. sp.24, Curvicaudus ciliatus n. gen. n. sp.24, Crassicerus furtivus n. gen. n. sp.24, Curticerus venustus n. gen. n. sp.24, Pustulithoracalis gloriosus n. gen. n. sp.24
Curvicaudus ciliatus n. gen. n. sp.24 Yao et al. 2006 true bug CNU-HE-LB2006023,024,022,029,030,033,0364
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Torrirostratus pilosus n. gen. n. sp.28 Yao et al. 2014 true bug CNU-HE-LB2006506, 371/404, 318/373, 362, 364, 367, 368, 369, 370, 372
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Floricaudus multilocellus n. gen.30, "Angulochterus quatrimaculatus n. gen. n. sp." = Angulochterus quadrimaculatus30, Pristinochterus zhangi n. gen. n. sp.25
"Angulochterus quatrimaculatus n. gen. n. sp." = Angulochterus quadrimaculatus30 Yao et al. 2011 velvety shore bug | |
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Ashanga hongi8, "Parahagla sibirica" = Parahagla sibirica8, "Chifengia lata n. sp." = Parahagla sibirica16, "Trachohagla jeholia n. gen. n. sp." = Parahagla sibirica16, "Chifengia angustata n. sp." = Parahagla sibirica16, "Grammohagla latibasis n. sp." = Parahagla sibirica16
"Trachohagla jeholia n. gen. n. sp." = Parahagla sibirica16 Sharov 1968 hump-winged cricket CNU-O-LB2006008
"Grammohagla latibasis n. sp." = Parahagla sibirica16 Sharov 1968 hump-winged cricket CNU-O-LB2006007
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Elisama cuboides n. sp., Elisama extenuata, Habroblattula drepanoides n. gen. n. sp.22, Macaroblattula ellipsoides n. gen. n. sp.
Elisama cuboides n. sp. Wang et al. 2007 cockroach
Habroblattula drepanoides n. gen. n. sp.22 Wang et al. 2007 cockroach CNU-B-LB2006369-1, 305, 378, 386, 389, 392, 301-304, 369-2, 390-1, 390-2, 306, 391
Macaroblattula ellipsoides n. gen. n. sp. Wang et al. 2007 cockroach |