NJ659, Yijianfang section, Bachu area (Ordovician of China)

Where: Xinjiang, China (40.2° N, 78.9° E: paleocoordinates 31.1° S, 117.8° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Yijianfang Formation, Darriwilian (467.3 - 458.4 Ma)

• middle of bed 31

Environment/lithology: reef, buildup or bioherm; lithified, gray limestone and lithified chert

• lower unit of platform-margin carbonate buildup
• Collection from 13.2 m unit of dark-grey thick-bedded calcirudites with chert bands

Size class: macrofossils

Reposited in the NIGPAS

Collection methods: surface (in situ), mechanical,

• Collection made as part of an extensive field investigation of the periphery of the Tarim Basin by geologists of the Nanjing Institute of Geology and Palaeontology, Academia Sinica, and the 05 Project Administration, Bureau of Petroleum Geology of Southwest China.

Primary reference: Z. Zhou, G. Yin, and Z. Zhou. 2014. Ordovician (Darriwilian-early Katian) trilobite faunas of northwestern Tarim, Xinjiang, China. Memoirs of the Association of Australasian Palaeontologists 46:1-142 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 188379: authorized by Melanie Hopkins, entered by Melanie Hopkins on 30.08.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Corynexochida - Illaenidae