Collection NJ410, Dawangou, northwestern Tarim Basin (Ordovician of China)

Where: Xinjiang, China (40.6° N, 79.5° E: paleocoordinates 34.8° S, 112.6° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Climacograptus bicornis graptolite zone, Kanling Formation, Katian (453.0 - 445.2 Ma)

• one of upper collections in bed 17

Environment/lithology: slope; lithified lime mudstone and lithified, gray, green, argillaceous lime mudstone

• deposited in deep outer shelf slope, probably around 100 m depth
• Bed from 12.8 section of purple thin-bedded knotty calcilutites and greyish-green argillaceous calcilutites

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 188363: authorized by Melanie Hopkins, entered by Melanie Hopkins on 29.08.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Agnostida - Metagnostidae
Corrugatagnostus sp. Kobayashi 1939 trilobite
 Asaphida - Dionididae
Dionide miaopoensis Lu 1975 trilobite