NJ663, 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: Tumuxiuke Formation, Llanvirn (466.0 - 460.9 Ma)

• middle of bed 35

Environment/lithology: offshore shelf; lithified, glauconitic, shelly/skeletal, gray, sandy grainstone

• shallow outer-shelf slope environment with depth slightly more than 70 m, just below storm wave base
• Collection from 14.4 m section of dark-grey thick-bedded arenaceous biocalcarenties with glauconites

Size class: macrofossils

Collected in 1987; 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 188381: authorized by Melanie Hopkins, entered by Melanie Hopkins on 30.08.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Phacopida - Pliomeridae
Ovalocephalus kanlingensis Zhang 1981 trilobite