Collection NJ293, Dawangou, northwestern Tarim Basin (Ordovician of China)

Where: Xinjiang, China (40.6° N, 79.5° E: paleocoordinates 27.6° S, 121.5° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Baltoniodus aff. navis conodont zone, Dawangou Formation, Arenig (478.6 - 466.0 Ma)

• same as bed 11 of Zhou et al 2014

Environment/lithology: slope; lithified, glauconitic, shelly/skeletal, gray grainstone and chert

• Based on composition and taphonomy of faunal assemblage
• Bed from 6 meter thick section of grey, medium-bedded, glauconite-bearing biocalcarenites, with cherty masses and bands

Size class: macrofossils

Collected in 1987; reposited in the NIGPAS, UNSM

• 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, W. T. Dean, W. Yuan and T. Zhou. 1998. Ordovician trilobites from the Dawangou Formation, Kalpin, Xinjiang, north-west China. Palaeontology 41(4):693-735 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 170837: authorized by Melanie Hopkins, entered by Melanie Hopkins on 27.06.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Corynexochida - Illaenidae
Illaenus sinensis, Nanillaenus ? primitivus
Illaenus sinensis Yabe 1920 trilobite
 Proetida - Telephinidae
Carolinites ichangensis
Carolinites ichangensis Lu 1975 trilobite
abundance reported as within 2-5 specimens
 Asaphida - Nileidae
Nileus walcotti
Nileus walcotti Endo 1932 trilobite
abundance reported as within 2-5 specimens
 Asaphida - Asaphidae
Mioptychopyge trinodosa
Mioptychopyge trinodosa Zhang 1981 trilobite