Yinshanpo KC260a, Qingyan (Triassic to of China)

Where: Guizhou, China (26.3° N, 106.7° E: paleocoordinates 13.3° N, 95.1° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Qingyan Formation, Pelsonian to Pelsonian (247.2 - 242.0 Ma)

• Bed 4 (units KC 259-262) is 80 m thick. About 200 m above base of Qingyan Formation.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, gray, green, yellow shale and lithified, gray marl

• 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?)
• Qingyan Formation consists mainly of gray to yellowish-green noncalcareous shale, pale-to dark-gray marl, calcareous shale, and argillaceous limestone, usually thin-bedded. Most of the fossils are collected from the shale and marl.

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 44250: authorized by David Bottjer, entered by Matthew Clapham on 07.09.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

 Spiriferinida - Bittnerulidae
Leiolepismatina semiconula Yang and Xu 1966
Thecocyrtelloidea tubulosa Yang and Xu 1966
 Rhynchonellida - Allorhynchidae
 Rhynchonellida - Norellidae
Nudirostralina subtrinodosi Yang and Xu 1966
ssp. multicostata
 Ptenoglossa - Protoculidae
"Toxoconcha brocchii" = Toxoconcha brocchi3
"Toxoconcha brocchii" = Toxoconcha brocchi3 Stoppani 1857 snail
 Hypsogastropoda - Coelostylinidae
Coelostylina ? liscaviensis3 Giebel 1856 snail
Trypanostylus cf. haueri3 Giebel 1856 snail
 Neritoidea - Naticopsidae
 Neritoidea - Neritariidae
Neritaria candida2 Kittl 1894 snail
 Murchisoniina - Lophospiridae
Worthenia sp.1 de Koninck 1883 snail
 Murchisoniina - Zygopleuridae
? Zygopleura arctecostata3 Münster 1841 snail
 Pleurotomarioidea - Zygitidae
Zygites elegans1 Yin and Yochelson 1983 snail
 Vetigastropoda - Discohelicidae
Discohelix (Discogonius) subvenusta3 Yin and Yochelson 1983 snail
 Seguenzioidea - Eucycloscalidae
Eucycloscala binodosa2 Münster 1841 snail
Eucycloscala obliquicostata2 Yin and Yochelson 1983 snail