Sizishan KC278, Qingyan (Triassic of China)

Where: Guizhou, China (26.3° N, 106.7° E: paleocoordinates 17.3° N, 95.2° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Falang Formation, Ladinian (242.0 - 237.0 Ma)

• Formation is 220 m thick, fossils collected from middle part.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified dolomite and lithified, dolomitic limestone

• Evaporative basin in Sichuan and north Guizhou separated from open marine to south in Yunnan and Guangxi by biohermal belt, located just north of Qingyan. The area near Qingyan was a prebiohermal facies. (Apparently fore-reef or something equivalent, located on the slope?)
• Thick-bedded and phanerocrystalline light-pink to pale-gray dolomitic limestone and dolomite.

Size class: macrofossils

Primary reference: T. Y. Yang and G. R. Xu. 1966. Triassic Brachiopods of Central Guizhou Province 1-151 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 44256: authorized by David Bottjer, entered by Matthew Clapham on 07.09.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Rhynchonellata
 Terebratulida - Angustothyrididae
"Sanqiaothyris subcircularis n. sp." = Rhaetina subcircularis
"Sanqiaothyris subcircularis n. sp." = Rhaetina subcircularis Yang and Xu 1966
Gastropoda
 Neritoina - Scalaneritinidae
"Natiria striatocostata" = Ladinaticella striatocostata2
"Natiria striatocostata" = Ladinaticella striatocostata2 Braun 1841 snail
 Neritoina - Delphinulopsidae
Seisia trachyneritoides2 Yin and Yochelson 1983 snail
 Trochonematoidea - Lophospiridae
Worthenia sp.1 de Koninck 1883 snail
 Turbinoidea - Turbinidae
Guizhouia kokeni2 Yin and Yochelson 1983 snail