Yinshanpo KC259b, 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 44247: authorized by David Bottjer, entered by Matthew Clapham on 07.09.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Rhynchonellata
 Spiriferinida - Mentzeliidae
Mentzelia subspherica n. sp. Yang and Xu 1966
 Spiriferinida - Bittnerulidae
Thecocyrtelloidea tubulosa Yang and Xu 1966
 Athyridida - Neoretziidae
"Neoretzia fuchsi" = Schwagerispira fuchsi
"Neoretzia fuchsi" = Schwagerispira fuchsi Koken 1900
 Rhynchonellida - Cyclothyrididae
"Septaliphoria sinensis" = Costirhynchopsis sinensis
"Septaliphoria sinensis" = Costirhynchopsis sinensis Yang and Xu 1966
 Rhynchonellida - Allorhynchidae
"Crurirhynchia subfissicostata" = Caucasorhynchella subfissicostata
"Crurirhynchia subfissicostata" = Caucasorhynchella subfissicostata Yang and Xu 1966
Gastropoda
 Neritoidea - Naticopsidae
 Neritoidea - Neritidae
Cryptonerita elliptica2 Kittl 1894 snail
 Euomphalina -
Triassocirrus applanatus3 Kutassy 1937 snail
Triassocirrus moellendorfi3 Koken 1900 snail
 Caenogastropoda - Coelostylinidae
Coelostylina ahlburgi3, "Toxoconcha brocchii" = Toxoconcha brocchi3
Coelostylina ahlburgi3 Assmann 1924 snail
"Toxoconcha brocchii" = Toxoconcha brocchi3 Stoppani 1857 snail
 Seguenzioidea - Eucyclidae
Eucycloscala obliquicostata2 Yin and Yochelson 1983 snail
 Neritoina - Delphinulopsidae
Delphinulopsis binodosa2 M√ľnster 1841 snail
 Murchisoniina - Phymatopleuridae
Worthenia (Worthenia) xui1 Yin and Yochelson 1983 snail
 Murchisoniina - Gosseletinidae
"Euryalox subcancellata" = Dictyotomaria subcancellata1
"Euryalox subcancellata" = Dictyotomaria subcancellata1 d'Orbigny 1849 snail