Where: Sichuan, China (28.6° N, 108.9° E: paleocoordinates 6.3° N, 126.7° E)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Upper Member (Xiushan Formation), Telychian (438.5 - 433.4 Ma)

• Except where otherwise stated, ref. 7624 uses Lower Silurian as equivalent to Llandovery, Middle Silurian as equivalent to Wenlock, and Upper Silurian as equivalent to Ludlow plus Pridoli. "The age of the Xiushan Formation is still an open question...On the chart we place the lower member in the latest Llandovery and the upper member in the latest Llandovery to early Wenlock." (Formation overlies Rongxi Fm., which is regarded as Telychian.) More recent data puts in in Telychian only, as the overlying Huixingshao is considered Telychian (PJW 2018-04-22).

• member-level stratigraphic resolution

Environment/lithology: marine; shale and mudstone

Size classes: macrofossils, mesofossils

Primary reference: J. T. Temple and H. J. Wu. 1990. Numerical taxonomy of Encrinurinae (Trilobita): additional species from China and elsewhere. Transactions of the Royal Society of Edinburgh: Earth Sciences 83:209-219 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 192930: authorized by Pete Wagner, entered by Pete Wagner on 26.04.2018

Creative Commons license: CC BY (attribution)