Where: Guangxi, China (24.1° N, 110.0° E: paleocoordinates 1.1° N, 125.5° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Ertang Formation, Late/Upper Emsian (402.5 - 391.9 Ma)

• 31 m thick [JA: originally entered as Emsian; Polygnathus inversus and P. serotinus are present in the lowest unit of the "Sipaian Stage" (probably this formation), so it is late Emsian]

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, gray, argillaceous, calcareous shale and limestone

Size class: macrofossils

Primary reference: R. Zhang and J. Pojeta, Jr. 1986. Devonian sections in Guangxi from which pelecypods were collected. Devonian rocks and Lower and Middle pelecypods of Guangxi, China and the Traverse Group of Michigan. United States Geological Survery Professional Paper 1394(E):33-43 [J. Alroy/M. Sommers] more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 4693: authorized by John Alroy, entered by Mike Sommers on 17.08.1999

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)