Section 3, BT5 (Cambrian to of China)

Where: Gansu, China (41.5° N, 96.7° E: paleocoordinates 41.5° N, 96.7° E)

• coordinate stated in text

When: Shuangyingshan Formation, Atdabanian to Atdabanian (521.0 - 509.0 Ma)

• Series 2

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, white grainstone

• Greyish white and light pink biocalcarenites with intercalated beds of a biosparite

Size classes: macrofossils, mesofossils

Collected by Zhou Zhiqiang; reposited in the NIGPAS

Collection methods: surface (in situ), mechanical,

Primary reference: J. Bergström, Z. Zhou, P. Ahlberg and N. Axheimer. 2014. Upper lower Cambrian (provisional Cambrian Series 2) trilobites from northwestern Gansu Province, China. Estonian Journal of Earth Sciences 63(3):123-143 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 181363: authorized by Melanie Hopkins, entered by Melanie Hopkins on 08.09.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

 Agnostida - Calodiscidae
 Agnostida - Eodiscidae
Pagetides sp. Rasetti 1945
Questionably assigned to genus
 Agnostida - Weymouthiidae
 Corynexochida - Edelsteinaspididae
 Corynexochida - Dinesidae
 Corynexochida - Dorypygidae
Kootenia sp. Walcott 1899 trilobite