Qingguo AH-346, Bed 12, Zhongba (Permian of China)

Where: Xizang, China (29.8° N, 84.1° E: paleocoordinates 52.6° S, 62.5° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Juripu Formation, Wuchiapingian (259.9 - 254.2 Ma)

• Upper part, could range into Changhsingian

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, nodular, gray, silty shale

• Grey silty slate and calcareous slate, with ironstone and calcareous nodules

Size class: macrofossils

Collected by Geological Survey of Tibet in 1980

Primary reference: H. B. Sheng. 1989. Early Permian ammonoids from the Juripu Formation, Zhongba, Xizang (Tibet). Geological Review 35:324-332 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 117571: authorized by Matthew Clapham, entered by Matthew Clapham on 25.09.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Prolecanitida - Medlicottiidae
Medlicottia sp., Propinacoceras cf. beyrichi
Medlicottia sp. Waagen 1880 ammonite
Propinacoceras cf. beyrichi Gemmellaro 1887 ammonite
 Goniatitida - Cyclolobidae
"Cyclolobus kraffti" = Cyclolobus walkeri, Cyclolobus zhongbaensis n. sp.
"Cyclolobus kraffti" = Cyclolobus walkeri Diener 1903 ammonite
Cyclolobus zhongbaensis n. sp. Sheng 1989 ammonite