Where: Shaanxi, China (39.4° N, 110.9° E: paleocoordinates 39.7° N, 89.0° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Heshanggou Formation, Olenekian to Olenekian (251.2 - 242.0 Ma)

• "Lower assemblage" of the Heshanggou Formation of the Ordos Basin, the age of which is based entirely upon biostratigraphy (see Nesbitt et al. 2011). Vertebrate biostratigraphy (presence of the Anisian taxon Kannemeyeria in the overlying "upper assemblage" of the Heshanggou and presence of the Early Triassic Proterosuchus in the "lower assemblage") as well as plant and microspore data suggests an Olenekian-earliest Anisian age (Nesbitt et al. 2011)

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; red, sandy marl

Size class: macrofossils

Collected in 1977; reposited in the IVPP

Primary reference: X. Wu. 1981. The discovery of a new thecodont from north-east Shensi. Vertebrata PalAsiatica 19:122-132 [R. Butler/R. Butler]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 98594: authorized by Richard Butler, entered by Richard Butler on 13.10.2010

Creative Commons license: CC BY (attribution)