"Guanling biota" redirects here. For the Anisian-age geological formation, see Guanling Formation.
Xiaowa Formation
Stratigraphic range: Carnian
Type
Geological formation
Underlies
Laishike Formation
Overlies
Zhuganpo Formation
Lithology
Primary
limestone, marl
Location
Country
China
Extent
Yunnan–Guizhou Plateau
The Xiaowa Formation is a Carnian-age geological formation found in southern China. It is a sequence of limestone and marls from the Carnian stage of the Triassic. Its lower section was previously known as the Wayao Formation or Wayao Member of the Falang Formation (a nomenclature still used by some authors). In 2002, the Wayao Member was renamed and raised to the Xiaowa Formation to prevent confusion with an Eocene unit of the same name.[1] Crinoids and marine reptiles are abundant in the Xiaowa Formation, forming a lagerstätte known as the Guanling biota. Ammonoids and conodonts found in the formation constrain its age to the early Carnian.[2][1][3][4][5] Reptiles of the Guanling biota include ichthyosaurs, thalattosaurs, placodonts, and Odontochelys (an early relative of turtles).[4] Sedimentary events within this formation have been tied to the Carnian Pluvial Event.[6][7]
^ abCite error: The named reference :1 was invoked but never defined (see the help page).
^Hao Weicheng, Sun Yuanlin, Jiang Dayong, Yang Shouren, Wang Xinping (2003). "Cephalopods of the "Falang Formation" (Triassic) from Guanling and Zhenfeng Counties, Guizhou Province, China". Acta Geologica Sinica - English Edition. 77 (4): 430–439. doi:10.1111/j.1755-6724.2003.tb00124.x. ISSN 1755-6724. S2CID 129859010.{{cite journal}}: CS1 maint: multiple names: authors list (link)
^Yan Li, Zuoyu Sun, Yuan-Lin Sun, Dayong Jiang, Weicheng Hao (May 2013). "Carnian (Late Triassic) ammonoid biostratigraphy in Luoping County, eastern Yunnan Province, China". Acta Scientiarum Naturalium Universitatis Pekinensis (in Chinese and English). 49 (3): 471–479.{{cite journal}}: CS1 maint: multiple names: authors list (link)
^ abBenton, Michael J.; Zhang, Qiyue; Hu, Shixue; Chen, Zhong-Qiang; Wen, Wen; Liu, Jun; Huang, Jinyuan; Zhou, Changyong; Xie, Tao; Tong, Jinnan; Choo, Brian (2013-10-01). "Exceptional vertebrate biotas from the Triassic of China, and the expansion of marine ecosystems after the Permo-Triassic mass extinction". Earth-Science Reviews. 125: 199–243. Bibcode:2013ESRv..125..199B. doi:10.1016/j.earscirev.2013.05.014. ISSN 0012-8252.
^Sun, Zuoyu; Jiang, Dayong; Ji, Cheng; Hao, Weicheng (2016-03-15). "Integrated biochronology for Triassic marine vertebrate faunas of Guizhou Province, South China". Journal of Asian Earth Sciences. 118: 101–110. Bibcode:2016JAESc.118..101S. doi:10.1016/j.jseaes.2016.01.004. ISSN 1367-9120.
^Sun, Y. D.; Wignall, P. B.; Joachimski, M. M.; Bond, D. P. G.; Grasby, S. E.; Lai, X. L.; Wang, L. N.; Zhang, Z. T.; Sun, S. (2016-06-15). "Climate warming, euxinia and carbon isotope perturbations during the Carnian (Triassic) Crisis in South China". Earth and Planetary Science Letters. 444: 88–100. Bibcode:2016E&PSL.444...88S. doi:10.1016/j.epsl.2016.03.037. ISSN 0012-821X.
^Zhang, Yang; Li, Mingsong; Ogg, James G.; Montgomery, Paul; Huang, Chunju; Chen, Zhong-Qiang; Shi, Zhiqiang; Enos, Paul; Lehrmann, Daniel J. (2015-10-15). "Cycle-calibrated magnetostratigraphy of middle Carnian from South China: Implications for Late Triassic time scale and termination of the Yangtze Platform". Palaeogeography, Palaeoclimatology, Palaeoecology. 436: 135–166. Bibcode:2015PPP...436..135Z. doi:10.1016/j.palaeo.2015.05.033. ISSN 0031-0182.
The XiaowaFormation is a Carnian-age geological formation found in southern China. It is a sequence of limestone and marls from the Carnian stage of the...
extinct genus of stem-turtle from the Late Triassic XiaowaFormation (or Wayao Member of the Falang Formation) of southwestern China. Eorhynchochelys is notable...
Osteology of Concavispina biseridens (Reptilia, Thalattosauria) from the XiaowaFormation (Carnian), Guanling, Guizhou, China Journal of Palaeontology 87:341-350...
uncertain at best. Neosinasaurus, a poorly-known reptiles from the XiaowaFormation of China, has also been considered a thalattosaur. Thalattosaurian...
of several thalattosaurs found in the XiaowaFormation, also known as the Wayao Member of the Falang Formation. The genus name "Miodentosaurus" translates...
an extinct genus of ichthyosaur which is known primarily from the XiaowaFormation of the lower Carnian stage of the Late Triassic in southwest China...
in the Falang Formation in 2013 by Pengfei Yang and colleagues. Complete Qianichthyosaurus fossils are common in the XiaowaFormation, with both juveniles...
Zhuganpo Formation is a Triassic geologic unit found in southern China. It has historically been known as the Zhuganpo Member of the Falang Formation. A diverse...
shastasaurus between 2011 and 2013) whose remains were found in the Pardonet Formation of British Columbia by Elizabeth Nicholls, has been estimated to be as...
thalattosaur reptile from the early Late Triassic (Carnian stage) XiaowaFormation of Guangling, Guizhou, southern China. It contains a single species...
"Osteology of Concavispina biseridens (Reptilia, Thalattosauria) from the XiaowaFormation (Carnian), Guanling, Guizhou, China". Journal of Paleontology. 87 (2):...
"Osteology of Concavispina biseridens (Reptilia, Thalattosauria) from the XiaowaFormation (Carnian), Guanling, Guizhou, China". Journal of Paleontology. 87 (2):...
extinct genus of placodont reptile from the Late Triassic (Tuvalian) XiaowaFormation of China. Only one species, Sinocyamodus xinpuensis, is currently assigned...
species as C. asiaticus based on a complete skull discovered in the XiaowaFormation, located in Guizhou Province, China, and it was considered as the most...
pyramid-shaped crown of the referred dermal denticles. It is known from two XiaowaFormation sites in Guizhou, China. They are middle Carnian in age. Its affinities...
fossil material of Pterogonaspis yuhaii from the Devonian Xujiachong Formation (Yunnan, China), providing new information on the cranial anatomy of this...
Eocyclotosaurus appetolatus known from the Tecolotito bonebed (Moenkopi Formation; New Mexico, United States) is published by Rinehart & Lucas (2016). A...
post-thoracic exoskeleton of Entelognathus primordialis from the Silurian Kuanti Formation (China), reporting the presence of an anal fin spine in the studied specimen...
Kimmeridgian ammonites from the planula Biohorizon of the Wohlgeschichtete Kalk Formation (Germany) is published by Jantschke & Schweigert (2023). Revision of acanthohoplitid...
(2013). "Silurian Halysitids (Coelenterata: Tabulata) from the Gionyama Formation, Miyazaki Prefecture, Japan" (PDF). Bulletin of the National Museum of...
Michelutti, Neal; Tapia, Pedro M.; Labaj, Andrew L.; Grooms, Christopher; Wang, Xiaowa; Smol, John P. (16 July 2019). "A limnological assessment of the diverse...
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