Lujiatun village, Shangyuan [general] (IVPP): Late/Upper Barremian - Early/Lower Aptian, China
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia
- Eutriconodonta
- Gobiconodontidae
|
||||||||||
Repenomamus robustus n. gen., n. sp.
Li et al. 2000
|
Li et al. 2000 | 4 individuals | ||||||||
IVPP V12549 (holotype skeleton); Kielan-Jaworowska et al (2004, p. 243) mentioned 'four nearly complete skulls' | ||||||||||
Repenomamus giganticus n. sp.
Hu et al. 2005
|
Hu et al. 2005 | 1 individual | ||||||||
IVPP V14155; nearly complete skeleton | ||||||||||
Meemannodon lujiatunensis n. gen., n. sp.
Meng et al. 2005
|
Meng et al. 2005 | 1 individual | ||||||||
IVPP V13102 | ||||||||||
Gobiconodon zofiae n. sp.
Li et al. 2003
|
Li et al. 2003 | 1 individual | ||||||||
IVPP V12585 (holotype) | ||||||||||
Reptilia
|
||||||||||
Dalinghosaurus longidigitus
Ji 1998
|
Evans et al. 2007 | 16 individuals | ||||||||
IVPP V14234 (slab with 15-16 individuals) + IVPP V13282 (skull), V14234.1 (postcrania) | ||||||||||
Reptilia
- Jeholosauridae
|
||||||||||
Jeholosaurus shangyuanensis n. gen., n. sp.
Xu et al. 2000
|
6 individuals | |||||||||
IVPP V12529, V12530, V15176-V15179 - may come from different strat levels (3 measurements) | ||||||||||
Reptilia
|
||||||||||
Psittacosauridae indet.
Osborn 1923
|
Sereno 1997 | 2 individuals | ||||||||
= Hongshanosaurus houi n. gen., n. sp.
You et al. 2003
|
You et al. 2003 | |||||||||
synonym of Psittacosaurus lujiatunensis | ||||||||||
IVPP V12704 (holotype), almost complete skull. IVPP V12617, complete skull | ||||||||||
Liaoceratops yanzigouensis
Xu et al. 2002
|
Xu et al. 2002 | 1 individual | ||||||||
IVPP V12633 | ||||||||||
Reptilia
- Troodontidae
|
||||||||||
Sinusonasus magnodens n. gen., n. sp.
Xu and Wang 2004
|
Xu and Wang 2004 | 1 individual | ||||||||
IVPP V11527 (4 measurements) | ||||||||||
Sinovenator changii n. gen., n. sp.
Xu et al. 2002
|
Xu et al. 2002 | 1 individual | ||||||||
IVPP V12615 (10 measurements) | ||||||||||
Mei long n. gen., n. sp.
Xu and Norell 2004
|
Xu and Norell 2004 | 1 individual | ||||||||
IVPP V12733 (6 measurements) | ||||||||||
Reptilia
- Dromaeosauridae
|
||||||||||
Graciliraptor lujiatunensis n. gen., n. sp.
Xu and Wang 2004
|
Xu and Wang 2004 | 1 individual | ||||||||
IVPP V13474 (5 measurements) | ||||||||||
Reptilia
|
||||||||||
Incisivosaurus gauthieri n. gen., n. sp.
Xu et al. 2002
|
Xu et al. 2002 | 1 individual | ||||||||
IVPP V13326 (1 measurement) | ||||||||||
Sauropoda indet.
Marsh 1878
|
Barrett and Wang 2007 | 3 specimens | ||||||||
IVPP V15010.8-10 | ||||||||||
cf. Euhelopus sp.
Romer 1956
|
Barrett and Wang 2007 | 7 specimens | ||||||||
IVPP V15010.1-7 | ||||||||||
see common names |
Geography
Country: | China | State/province: | Liaoning | County: | Beipiao |
Coordinates: | 41.6° North, 120.9° East (view map) | ||||
Paleocoordinates: | 44.3° North, 122.8° East | ||||
Basis of coordinate: | stated in text | ||||
Geographic resolution: | local area |
Time
Period: | Cretaceous | Epoch: | Early/Lower Cretaceous |
Key time interval: | Late/Upper Barremian - Early/Lower Aptian | ||
Age range of interval: | 130.00000 - 122.46000 m.y. ago |
Stratigraphy
Geological group: | Jehol | Formation: | Yixian | Member: | Lujiatun |
Stratigraphic resolution: | group of beds | ||||
Stratigraphy comments: basal member of Yixian Formation = Member 1 = Lujiatun beds; 40Ar/39Ar age for bed is 123.2 ± 1.0 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). |
Lithology and environment
Primary lithology: | tuff | ||
Lithology description: fossil-bearing tuffs are structureless | |||
Environment: | fluvial indet. | Tectonic setting: | volcanic basin |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils,mesofossils |
Preservation of anatomical detail: | good |
Articulated whole bodies: | many |
Associated major elements: | some |
Disassociated major elements: | many |
Fragmentation: | occasional |
Temporal resolution: | snapshot |
Collection methods and comments
Collection excludes: | some macrofossils |
Collection methods: | field collection |
Reason for describing collection: | taxonomic analysis |
Museum repositories: | IVPP |
Collection method comments: "Fossils from the tuffs include frogs, squamates, dinosaurs, mammals and the new specimens reported here." |
Metadata
Also known as: | Beipiao | ||
Database number: | 53493 | ||
Authorizer: | R. Whatley, R. Benson, R. Butler, M. Carrano | Enterer: | R. Whatley, R. Butler, M. Carrano, K. Maguire, R. Benson |
Modifier: | M. Carrano | Research group: | vertebrate |
Created: | 2005-09-09 16:28:16 | Last modified: | 2023-04-28 11:16:07 |
Access level: | the public | Released: | 2005-09-09 16:28:16 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
14918. | ETE | X. Xu, X.-L. Wang, and H.-L. You. 2000. A primitive ornithopod from the Early Cretaceous Yixian Formation of Liaoning. Vertebrata PalAsiatica 38(4):318-325 [M. Carrano/M. Carrano] |
Secondary references:
43669 | R. Amiot, X. Wang, Z. Zhou, X. Wang, E. Buffetaut, C. Lécuyer, Z. Ding, F. Fluteau, T. Hibino, N. Kusuhashi, J. Mo, V. Suteethorn, Y. Wang, X. Xu, and F. Zhang. 2011. Oxygen isotopes of East Asian dinosaurs reveal exceptionally cold Early Cretaceous climates. Proceedings of the National Academy of Sciences 108(13):5179-5183 [M. Carrano/M. Carrano] | |
33230 | ETE | A. M. Balanoff, X. Xu, Y. Kobayashi, Y. Matsufune, and M. A. Norell. 2009. Cranial osteology of the theropod dinosaur Incisivosaurus gauthieri (Theropoda: Oviraptorosauria). American Museum Novitates 3651:1-35 [M. Carrano/M. Carrano] |
31350 | ETE | P. M. Barrett and F.-L. Han. 2009. Cranial anatomy of Jeholosaurus shangyuanensis (Dinosauria: Ornithischia) from the Early Cretaceous of China. Zootaxa 2072:31-55 [M. Carrano/M. Carrano] |
26084 | ETE | P. M. Barrett and X.-L. Wang. 2007. Basal titanosauriform (Dinosauria: Sauropoda) teeth from the Lower Cretaceous Yixian Formation of Liaoning Province, China. Palaeoworld 16:265-271 [M. Carrano/M. Carrano] |
37751 | S. E. Evans and Y. Wang. 2005. The Early Cretaceous lizard Dalinghosaurus from China. Acta Palaeontologica Polonica 50(4):725-742 [R. Benson/R. Benson] | |
37782 | S. E. Evans, Y. Wang, and M. E. H. Jones. 2007. An aggregation of lizard skeletons from the Lower Cretaceous of China. Senkenbergiana Lethaea 87(1):109-118 [R. Benson/R. Benson] | |
74240 | F. Han, Q. Zhao, J. Stiegler and X. Xu. 2020. Bone histology of the non-iguanodontian ornithopod Jeholosaurus shangyuanensis and its implications for dinosaur skeletochronology and development. Journal of Vertebrate Paleontology 40(2):e1768538:1-13 [M. Carrano/M. Carrano] | |
43694 | F.-L. Han, P. M. Barrett, R. J. Butler and X. Xu. 2012. Postcranial anatomy of Jeholosaurus shangyuanensis (Dinosauria, Ornithischia) from the Lower Cretaceous Yixian Formation of China. Journal of Vertebrate Paleontology 32(6):1370-1395 [M. Carrano/M. Carrano] | |
65488 | Y. He, P. J. Makovicky, X. Xing and H. You. 2018. High-resolution computed tomographic analysis of tooth replacement pattern of the basal neoceratopsian Liaoceratops yanzigouensis informs ceratopsian dental evolution. Scientific Reports 8(1):5870:1-15 [M. Carrano/M. Carrano] | |
13127 | Y. Hu, J. Meng, Y. Wang and C. Li. 2005. Large Mesozoic mammals fed on young dinosaurs. Nature 433:149-152 [R. Whatley/R. Whatley/R. Whatley] | |
37437 | C. Li, Y. Wang, Y. Hu and J. Meng. 2003. A new species of Gobiconodon (Triconodonta, Mammalia) and its implication for the age of Jehol Biota. Chinese Science Bulletin 48(11):1129-1134 [R. Benson/R. Benson/R. Benson] | |
14415 | J.-L. Li, Y. Wang, Y.-Q. Wang and C.-K. Li. 2000. A new family of primitive mammal from the Mesozoic of western Liaoning, China [in Chinese]. Chinese Science Bulletin 45:2545-2549 [R. Whatley/R. Whatley/J. Alroy] | |
29878 | ETE | J. Meng, Y.-M. Hu, Y.-Q. Wang and C.-K. Li. 2005. A new triconodont (Mammalia) from the Early Cretaceous Yixian Formation of Liaoning, China. Vertebrata PalAsiatica 43(1):1-10 [M. Carrano/M. Carrano] |
62058 | P. Sereno. 1997. Psittacosauridae. In P. J. Currie & K. Padian (ed.), Encyclopedia of Dinosaurs 611-613 [M. Carrano/M. Carrano] | |
45965 | Y.-Q. Wang, Y.-M. Hu, and C.-K. Li. 2006. Review of recent advances on study of Mesozoic mammals in China. Vertebrata PalAsiatica 44(2):193-204 [P. Mannion/J. Tennant] | |
12907 | ETE | X. Xu, Y.-N. Cheng, X.-L. Wang and C.-H. Chang. 2002. An unusual oviraptorosaurian dinosaur from China. Nature 419:291-293 [M. Carrano/M. Carrano/M. Carrano] |
14923 | ETE | X. Xu, P. J. Makovicky, X.-l. Wang, M. A. Norell, and H.-l. You. 2002. A ceratopsian dinosaur from China and the early evolution of the Ceratopsia. Nature 416:314-317 [M. Carrano/M. Carrano/M. Carrano] |
12906 | ETE,5% 55040 | X. Xu, M. A. Norell, X.-l. Wang, P. J. Makovicky, and X.-c. Wu. 2002. A basal troodontid from the Early Cretaceous of China. Nature 415:780-784 [M. Carrano/M. Carrano/J. Alroy] |
14926 | ETE,5% 62420 | X. Xu and M. A. Norell. 2004. A new troodontid dinosaur from China with avian-like sleeping posture. Nature 431:838-841 [M. Carrano/M. Carrano/M. Carrano] |
29877 | X. Xu and X.-L. Wang. 2004. A new dromaeosaur (Dinosauria: Theropoda) from the Early Cretaceous Yixian Formation of western Liaoning. Vertebrata PalAsiatica 42(2):111-119 [M. Carrano/M. Carrano] | |
18463 | ETE | X. Xu and X. Wang. 2004. A new troodontid (Theropoda: Troodontidae) from the Lower Cretaceous Yixian Formation of western Liaoning, China. Acta Geologica Sinica 78(1):22-26 [M. Carrano/M. Carrano] |
14993 | ETE | H. You, X. Xu, and X. Wang. 2003. A new genus of Psittacosauridae (Dinosauria: Ornithopoda) and the origin and early evolution of marginocephalian dinosaurs. Acta Geologica Sinica 77(1):15-20 [M. Carrano/M. Carrano] |