Yangchang section, beds 35-32 (Permian of China)

Where: Guizhou, China (25.7° N, 105.2° E: paleocoordinates 11.2° S, 95.1° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Yangchang Formation, Artinskian (290.1 - 279.3 Ma)

• Ammonoids, which are close to forms from the lower Longyin Formation of the Longyin section, also have an early Artinskian age:

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified claystone

Size class: macrofossils

Reposited in the NIGPAS

Primary reference: Z. R. Zhou. 2017. Permian basinal ammonoid sequence in Nanpanjiang area of South China - possible overlap between basinal Guadalupian and platform-based Lopingian. Journal of Paleontology 91(Memoir 74):1-95 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 185544: authorized by Matthew Clapham, entered by Matthew Clapham on 27.04.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Goniatitida - Metalegoceratidae
Eothinites cf. kargalensis Ruzhentsev 1933 ammonite
 Prolecanitida - Medlicottiidae
Sicanites notabilis Ruzhentsev 1940 ammonite
Bamyaniceras knighti Miller and Furnish 1940 ammonite
Bamyaniceras nandanense Zhou 2017 ammonite
Bamyaniceras yangchangense n. sp. Zhou 2017 ammonite
Miklukhoceras guizhouense Zhou 2017 ammonite
 Prolecanitida - Pronoritidae
Parapronorites cf. rectus Leonova 1989 ammonite