NJ665-3, Yijianfang section, Bachu area (Ordovician of China)

Where: Xinjiang, China (40.2° N, 78.9° E: paleocoordinates 35.4° S, 112.3° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Baltoniodus alobatus conodont zone, Tumuxiuke Formation, Katian (453.0 - 445.2 Ma)

• upper collection in bed 37

Environment/lithology: offshore shelf; lithified, gray, red grainstone

• shallow outer-shelf slope environment with depth slightly more than 70 m, just below storm wave base
• Collection from 10.2 m section of red to purple thin-bedded knotty calcarenites

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 188385: authorized by Melanie Hopkins, entered by Melanie Hopkins on 30.08.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Corynexochida - Styginidae
 Corynexochida - Panderiidae
Panderia dayongensis Ji 1987 trilobite
 Corynexochida - Illaenidae
 Agnostida - Metagnostidae
Trinodus cylindricus Chen in Li 1975 trilobite
 Phacopida - Pliomeridae
Ovalocephalus kanlingensis Zhang 1981 trilobite
Ovalocephalus cf. kelleri Koroleva 1959 trilobite