Guanling, Lower Xiaowa Formation fossil lagerst├Ątte (Triassic of China)

Where: Guizhou, China (25.9° N, 105.4° E: paleocoordinates 26.9° N, 87.4° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Lower Member (Xiaowa Formation), Tuvalian (232.0 - 221.5 Ma)

• 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

• group of beds-level stratigraphic resolution

Environment/lithology: deep-water; lithified shale and lithified marl

• 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
• 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

Size class: macrofossils

Collection methods: quarrying, mechanical,

Primary reference: 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]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 85166: authorized by Wolfgang Kiessling, entered by Uta Merkel on 04.12.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

 Ostreida - Pergamidiidae
Krumbeckiella sp.2 Ichikawa 1958 oyster
 Ostreida - Bakevelliidae
Angustella sp.2 Waagen 1907 oyster
 Ostreida - Halobiidae
 Ceratitida - Tibetitidae
 Ceratitida - Clionitidae
"Clionites cf. zeilleri" = Clionitites2
"Clionites cf. zeilleri" = Clionitites2 ceratite
 Ceratitida - Trachyceratidae
Trachyceras multituberculatum2 Hsu 1940 ceratite
Trachyceras cf. aon2 Munster 1834 ceratite
Paratrachyceras cf. hofmanni2 Boekh 1873 ceratite
Protrachyceras costulatum2 Mansuy 1912 ceratite
Protrachyceras deprati2 Mansuy 1912 ceratite
Protrachyceras ladinum2 Mojsisovics 1882 ceratite
 Testudinata -
Odontochelys semitestacea n. gen. n. sp.1
Odontochelys semitestacea n. gen. n. sp.1 Li et al. 2008 turtle
IVPP V 13240 (paratype), V 15639 (holotype), V 15653
 Thalattosauria - Askeptosauridae
 Thalattosauria -
Xinpusaurus suni2 Yin 2000 diapsid
Xinpusaurus bamaolinensis2 Cheng 2003 diapsid
 Sauropterygia - Cyamodontidae
Sinocyamodus xinpuensis2 Li 2000 placodont
 Sauropterygia - Placochelyidae
Psephochelys polyosteoderma n. gen. n. sp. Li and Rieppel 2002 placodont
IVPP V 12442
 Ichthyosauria - Toretocnemidae
Qianichthyosaurus zhoui2 Li 1999 ichthyosaur
 Ichthyosauria - Shastasauridae
"Guanlingichthyosaurus liangae" = Guanlingsaurus liangae2
"Guanlingichthyosaurus liangae" = Guanlingsaurus liangae2 Yin et al. 2000 ichthyosaur
 Ichthyosauria - Shonisauridae
"Ghuizhouichthyosaurus tangae" = Guizhouichthyosaurus tangae2
"Ghuizhouichthyosaurus tangae" = Guizhouichthyosaurus tangae2 Cao et al. 2000 ichthyosaur
Holothuroidea indet.2 de Blainville 1834 sea cucumber
 Encrinida -
Traumatocrinus sp.2 Woehrmann 1889 Sea lily
 Roveacrinida -
Osteocrinus cf. virgatus2 Kristan-Tollmann 1970 Sea lily
Osteocrinus cf. spinosus2 Kristan-Tollmann 1970 Sea lily
 Craniida - Craniidae
? Crania sp.2 Retzius 1781