Huangbanjigou, Chaomidian Village, CNU 2010 collection (Cretaceous of China)

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: A. A. Prokin and D. Ren. 2011. New species of variegated mud-loving beetles (Coleoptera: Heteroceridae) from Mesozoic deposits of China. Paleontological Journal 45(3):284-286 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 111716: 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
 Hemiptera - Notonectidae
Notonecta xyphiale21 Popov 1964 true bug
fourth or fifth instar nymph
 Hemiptera - Saldidae
Venustsalda locella n. gen. n. sp.20 Zhang et al. 2012 shore bug
CNU-HET-LB2010335
Propritergum opimum19 Zhang et al. 2013 shore bug
CNU-HET-LB2010336
Mesolygaeus naevius19 Hong 1980 shore bug
CNU-HET-LB2010314/2010315/2010320/2010319/2010332/2010321/2010313;Nch881142N193, Nch 881149N200, Nch881087-1N110
Mesolygaeus laiyangensis19 Ping 1928 shore bug
CNU-HET-LB2010329pc,CNU-HET-LB2010325/2010326/2010327/2010328/ 2010337
"Longianteclypea tibialis" = Mongolocoris tibialis19 Popov 1986 shore bug
CNU-HET-LB2010331, CNU-HETLB2010332
 Hemiptera -
Sinovelia popovi n. sp.17, Sinovelia mega n. gen. n. sp.17
Sinovelia popovi n. sp.17 Yao et al. 2012 true bug
Sinovelia mega n. gen. n. sp.17 Yao et al. 2012 true bug
 Hemiptera - Torrirostratidae
Flexicorpus acutirostratus15 Yao et al. 2014 true bug
Torrirostratus pilosus15 Yao et al. 2014 true bug
CNU-HE-LB2010044, 136, 137, 138, 139, 140, 141, 182, 183
 Hemiptera - Kobdocoridae
Halonatusivena shii5 Du et al. 2016 true bug
CNU-HE-LB2010039/220, 144, 149, 151, 159, 166, 168, 243, 346
Halonatusivena nervosus5 Du et al. 2016 true bug
CNU-HE-LB2010129/244, 127/216
Venicoris solaris16 Yao et al. 2012 true bug
CNU-HE-LB2010016
 Hemiptera - Rhopalidae
Vescisalignus indecorus n. gen. n. sp.3
Vescisalignus indecorus n. gen. n. sp.3 Chen et al. 2015 scentless plant bug
CNU-Het-LB2010212, 249, 250, 251, 252, 253, 254, 255, 257, 258, 259, 260, 263
 Hemiptera - Yuripopovinidae
Changirostrus maculatus6 Du et al. 2016 true bug
CNU-HE-LB2010129, 380
Dehiscensicoris sanctus6 Du et al. 2016 true bug
CNU-HE-LB2010007-011/012/014/015/017/020-026/029-033/038/040-043/053/125
Minuticoris brunneus n. gen. n. sp.6 Du et al. 2016 true bug
CNU-HE-LB2010036, 034
 Siphonaptera - Saurophthiridae
Saurophthirus exquisitus9 Gao et al. 2013 flea
CNU-LB2010017, 018
 Coleoptera - Dytiscidae
Liadroporus elegans n. gen.13 Prokin and Ren 2010 predaceous diving beetle
 Coleoptera - Trachypachidae
"Fortiseode pervalimand n. gen. n. sp." = Evertus pervalimand10
"Fortiseode pervalimand n. gen. n. sp." = Evertus pervalimand10 Jia and Ren 2011 false ground beetle
 Coleoptera - Chrysomelidae
Mesolpinus adapertilis n. sp.11 Kirejtshuk et al. 2015 leaf beetle
CNU-COL-LB-2010253
Mesolpinus trapezicollis n. sp.11 Kirejtshuk et al. 2015 leaf beetle
CNU-COL-LB-2010255
Mesolpinus basicollis n. sp.11 Kirejtshuk et al. 2015 leaf beetle
CNU-COL-LB-2010210, 211
 Coleoptera -
Curculionoidea "indet. 3"4 Latreille 1802 weevil
CNU-C-LB2010159
 Coleoptera - Cimberididae
Chinocimberis magnoculi4 Liu et al. 2006 weevil
CNU-C-LB2010155, 702
 Coleoptera - Nemonychidae
? Nemonychidae "indet. 4"4 Bedel 1882 pine flower snout beetle
CNU-C-LB2010709
Renicimberis latipecteris4 Liu et al. 2006 pine flower snout beetle
CNU-C-LB2010153
 Coleoptera - Caridae
Cretonanophyes punctatus4 Liu and Ren 2007 weevil
CNU-C-LB2010158, 707, 708
"Abrocarina indet." = Abrocarini4 Legalov 2009 weevil
CNU-C-LB2010154
Abrocar macilentus4 Liu and Ren 2007 weevil
CNU-C-LB2010151, 156, 157, 704
Abrocar relicinus n. sp.4 Davis et al. 2013 weevil
CNU-C-LB2010152, 160
Abrocar brachyorhinos4 Liu and Ren 2006 weevil
CNU-C-LB2010701, 703, 705, 706
 Coleoptera - Buprestidae
Mongoligenula gracilis n. sp.18 Yu et al. 2015 jewel beetle
CNU-COL-NN2010406, LB2010397
Mongoligenula altilabdominis n. gen. n. sp.18 Yu et al. 2015 jewel beetle
CNU-COL-LB2010412, 398, 403
 Coleoptera - Heteroceridae
Heterocerites magnus n. sp. Prokin and Ren 2011 Variegated mud-loving beetle
 Coleoptera - Lucanidae
Prosinodendron krelli n. gen. n. sp.2
Prosinodendron krelli n. gen. n. sp.2 Bai et al. 2012 stag beetle
CNU-COL-LB2010607
 Coleoptera -
Prophaenognatha robusta n. gen. n. sp.1
Prophaenognatha robusta n. gen. n. sp.1 Bai et al. 2011 scarab beetle
 Coleoptera - Hydrophilidae
Hydroyixia elongata n. gen. n. sp.7 Fikáček et al. 2014 water scavenger beetle
CNU-2010005
Hydroyixia latissima7 Fikáček et al. 2014 water scavenger beetle
CNU-COL-LB2010014
Alegorius yixianus7 Fikáček et al. 2014 water scavenger beetle
CNU-2010024, 025
 Coleoptera -
Sinosperchopsis silinae n. gen. n. sp.14, "Hydrophilopsia hydraenoides n. sp." = Laetopsia hydraenoides14, "Hydrophilopsia shatrovskiyi n. sp." = Laetopsia shatrovskiyi14
Sinosperchopsis silinae n. gen. n. sp.14 Prokin et al. 2010 water scavenger beetle
CNU-COL-LB2010001, 002, 003, 028
"Hydrophilopsia hydraenoides n. sp." = Laetopsia hydraenoides14 Prokin et al. 2010 water scavenger beetle
CNU-COL-LB2010021, 026, 089
"Hydrophilopsia shatrovskiyi n. sp." = Laetopsia shatrovskiyi14 Prokin et al. 2010 water scavenger beetle
CNU-COL-LB2010242, 016, 012
 Coleoptera - Helophoridae
"Hydrophilopsia gracilis n. sp." = Helophorus (Mesosperchus) gracilis14, Helophorus (Mesosperchus) yixianus n. sp.8
"Hydrophilopsia gracilis n. sp." = Helophorus (Mesosperchus) gracilis14 Prokin et al. 2010 water scavenger beetle
CNU-COL-LB2010018, 030, 067, 068
Helophorus (Mesosperchus) yixianus n. sp.8 Fikáček et al. 2012 water scavenger beetle
CNU-COL-LB2010004 (formerly paratype of H. shatrovskiyi)
 Odonata - Rudiaeschnidae
Rudiaeschna limnobia12 Ren and Guo 1996 true dragonfly