Xiaoshizuizigou, 3 km south of Ningqiang (Silurian of China)

Where: Shaanxi, China (32.8° N, 106.3° E: paleocoordinates 5.5° N, 131.5° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Monograptus crispus graptolite zone, Upper Member (Wangjiawan Formation), Telychian (438.5 - 433.4 Ma)

• Informally named upper member

• member-level stratigraphic resolution

Environment/lithology: marine; shale and limestone

• Correlation chart indicates ba5 based on graptolitic fauna.
• "The formation has a total thickness of 257.3 m, and includes abundant shale and siltstone, with minor amounts of limestone (including a basal limestone which weathers to a honeycomb-like surface)."

Size class: macrofossils

Primary reference: J.-t. Xu. 1990. New materials of Telychian (Llandovery, Silurian) rostroconchs from South China. Acta Palaeontologica Sinica 29(5):592-600 [P. Wagner/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 167883: authorized by Pete Wagner, entered by Pete Wagner on 05.04.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Pterobranchia
 Graptoloidea - Monograptidae
Monograptus drepanoformis
Bivalvia
 Cyrtodontida - Cardiolidae
Cardiola sp.
Cardiola sp. Broderip 1839 clam
Rostroconchia
 Ribeirioida - Ribeiriidae
Pinnocaris lembodes
Trilobita
 Phacopida - Encrinuridae
Coronocephalus (Coronaspis) sp.
Coronocephalus (Coronaspis) sp. Grabau 1924 trilobite
Protozoa
  -
Ancyrochitina brevcollis