Guanling, Lower Xiaowa Formation fossil lagerstätte: Tuvalian, China
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Similingula cf. lipoldi
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Wang et al. 2008 | |||||||||
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Reptilia
- Testudines
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Odontochelys semitestacea n. gen., n. sp.
Li et al. 2008
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Li et al. 2008 | 3 individuals | ||||||||
| IVPP V 13240 (paratype), V 15639 (holotype), V 15653 | ||||||||||
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Reptilia
- Shastasauridae
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Guanlingichthyosaurus liangae
(Yin et al. 2000)
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Wang et al. 2008 | |||||||||
| original and current combination Guanlingsaurus liangae | ||||||||||
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Ghuizhouichthyosaurus tangae
(Cao et al. 2000)
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Wang et al. 2008 | |||||||||
| original and current combination Guizhouichthyosaurus tangae | ||||||||||
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Reptilia
- Toretocnemidae
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Qianichthyosaurus zhoui
Li 1999
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Wang et al. 2008 | |||||||||
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Reptilia
- Thalattosauria
- Askeptosauridae
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Anshunsaurus huangguoshuensis
Liu 1999
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Wang et al. 2008 | |||||||||
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Reptilia
- Thalattosauria
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Xinpusaurus bamaolinensis
Cheng 2003
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Wang et al. 2008 | |||||||||
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Xinpusaurus suni
Yin 2000
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Wang et al. 2008 | |||||||||
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Reptilia
- Placodontia
- Cyamodontidae
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Sinocyamodus xinpuensis
Li 2000
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Wang et al. 2008 | |||||||||
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Cyamodus orientalis n. sp.
Wang et al. 2019
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Wang et al. 2019 | 1 individual | ||||||||
| Zhejiang Museum of Natural History, Hangzhou, ZMNH M8820 (holotype), "an articulated and nearly complete skeleton with three-dimensionally preserved skull and lacking only the forelimbs, representing an adult individual based on overall body size" | ||||||||||
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Reptilia
- Placodontia
- Placochelyidae
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Psephochelys polyosteoderma n. gen., n. sp.
Li and Rieppel 2002
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1 individual | |||||||||
| IVPP V 12442 | ||||||||||
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Conodonta
- Ozarkodinida
- Gondolellidae
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Metapolygnathus polygnathiformis
(Budurov and Stefanov 1965)
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Wang et al. 2008 | |||||||||
| recombined as Paragondolella polygnathiformis | ||||||||||
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Metapolygnathus nodosus
(Hayashi 1968)
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Wang et al. 2008 | |||||||||
| recombined as Hayashiella nodosa | ||||||||||
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Crinoidea
- Roveacrinida
- Somphocrinidae
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Osteocrinus cf. virgatus
Kristan-Tollmann 1970
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Wang et al. 2008 | |||||||||
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Osteocrinus cf. spinosus
Kristan-Tollmann 1970
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Wang et al. 2008 | |||||||||
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Crinoidea
- Encrinida
- Traumatocrinidae
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Traumatocrinus sp.
Woehrmann 1889
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Wang et al. 2008 | |||||||||
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Holothuroidea
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Holothuroidea indet.
(de Blainville 1834)
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Wang et al. 2008 | |||||||||
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Craniata
- Craniida
- Craniidae
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? Crania sp.
Retzius 1781
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Wang et al. 2008 | |||||||||
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Bivalvia
- Ostreida
- Pergamidiidae
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Krumbeckiella sp.
Ichikawa 1958
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Wang et al. 2008 | |||||||||
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Bivalvia
- Ostreida
- Bakevelliidae
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Angustella sp.
Waagen 1907
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Wang et al. 2008 | |||||||||
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Bivalvia
- Ostreida
- Halobiidae
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Daonella bifurcata
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Wang et al. 2008 | |||||||||
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Halobia subcomata
Kittl 1912
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Wang et al. 2008 | |||||||||
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Cephalopoda
- Ceratitida
- Clionitidae
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Clionites cf. zeilleri
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Wang et al. 2008 | |||||||||
| replaced by Clionitites | ||||||||||
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Cephalopoda
- Ceratitida
- Tibetitidae
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Hauerites cf. himalayanus
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Wang et al. 2008 | |||||||||
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Cephalopoda
- Ceratitida
- Trachyceratidae
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Protrachyceras cf. douvillei
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Wang et al. 2008 | |||||||||
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Protrachyceras longiangense
|
Wang et al. 2008 | |||||||||
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Protrachyceras deprati
(Mansuy 1912)
|
Wang et al. 2008 | |||||||||
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Protrachyceras ladinum
(Mojsisovics 1882)
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Wang et al. 2008 | |||||||||
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Protrachyceras costulatum
Mansuy 1912
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Wang et al. 2008 | |||||||||
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Paratrachyceras cf. hofmanni
(Boekh 1873)
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Wang et al. 2008 | |||||||||
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Trachyceras sinensis
|
Wang et al. 2008 | |||||||||
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Trachyceras multituberculatum
Hsu 1940
|
Wang et al. 2008 | |||||||||
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Trachyceras cf. aon
(Munster 1834)
|
Wang et al. 2008 | |||||||||
| see common names | ||||||||||
Geography
| Country: | China | State/province: | Guizhou |
| Coordinates: | 25.9° North, 105.4° East (view map) | ||
| Paleocoordinates: | 26.9° North, 87.4° East | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| Period: | Triassic | Epoch: | Late/Upper Triassic |
| Stage: | Carnian | 10 m.y. bin: | Triassic 3 |
| Key time interval: | Tuvalian | ||
| Age range of interval: | 233.40000 - 227.00000 m.y. ago |
Stratigraphy
| Formation: | Xiaowa | Member: | Lower | ||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: 12 m thick, previously known as Wayao Member of Falang Formation or as Wayao Formation
JA: originally entered as Carnian; the Metapolygnathus polygnatiformis and M. nodosus zones are both Tuvalian according to Lucas et al. 2012 | |||||
Lithology and environment
| Primary lithology: | lithified "shale" |
| Secondary lithology: | lithified marl |
| Lithology description: lower unit (5 m thick) of medium- to thick-bedded, grey bioclastic micrites with yellow-green shale interbeds; upper unit (7 m thick) of greyish to black, thin- to medium-bedded laminated mudstone with argillaceous limestone interbeds and marlstones | |
| Environment: | deep-water indet. |
| Geology comments: deep and quiet water, the lower unit with generally oxygenated bottom water; the upper unit shaly interval with anoxic conditions and the greatest water depth | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | excellent |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection methods: | selective quarrying,mechanical,field collection |
| Reason for describing collection: | general faunal/floral analysis |
Metadata
| Database number: | 85166 | ||
| Authorizer: | W. Kiessling, B. Allen | Enterer: | U. Merkel, B. Allen |
| Modifier: | J. Alroy | Research group: | marine invertebrate,vertebrate |
| Created: | 2008-12-04 04:10:03 | Last modified: | 2012-09-05 23:51:02 |
| Access level: | the public | Released: | 2008-12-04 04:10:03 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 39730. | C. Li and O. Rieppel. 2002. A new cyamodontid placodont from Triassic of Guizhou, China. Chinese Science Bulletin 47(5):403-407 [M. Carrano/M. Carrano] |
Secondary references:
| 28659 | C. Li, X. C. Wu, O. Rieppel, L. T. Wang, and L. J. Zhao. 2008. An ancestral turtle from the Late Triassic of southwestern China. Nature 456:497-501 [W. Kiessling/U. Merkel] | |
| 80944 | W. Wang, C. Li, T. M. Scheyer and L. J. Zhao. 2019. A new species of Cyamodus (Placodontia, Sauropterygia) from the early Late Triassic of south-west China. Journal of Systematic Palaeontology 17(17):1457-1476 [B. Allen/B. Allen] | |
| 28658 | X. Wang, G. H. Bachmann, H. Hagdorn, P. M. Sanders, G. Cuny, X. Chen, C. Wang, L. Chen, L. Cheng, F. Meng, and G. Xu. 2008. The Late Triassic black shales of the Guanling area, Guizhou province, south-west China: a unique marine reptile and pelagic crinoid fossil lagerstätte. Palaeontology 51(1):27-61 [W. Kiessling/U. Merkel] |