Collection NJ382, Dawangou, northwestern Tarim Basin (Ordovician of China)

Where: Xinjiang, China (40.6° N, 79.5° E: paleocoordinates 32.8° S, 115.4° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Climacograptus bicornis graptolite zone, Kanling Formation, Sandbian (458.4 - 453.0 Ma)

• one of lower collections in bed 16

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

• deposited in deep outer shelf slope, probably around 100 m depth
• Bed from 5.2 m section of grey medium- to thin-bedded argillaceous calciludites

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 188352: authorized by Melanie Hopkins, entered by Melanie Hopkins on 29.08.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Asaphida - Cyclopygidae
Microparia (Microparia) acuta Zhang 1981 trilobite
Sagavia laxa Zhou et al. 2014 trilobite
 Asaphida - Nileidae
Paraperaspis convergens Lu 1975 trilobite