Also known as Zhun ge er qi (He-Shan-Kou Formation); Ordos Basin

Where: Nei Mongol, China (39.7° N, 111.0° E: paleocoordinates 39.9° N, 89.2° E)

• coordinate estimated from map

• small collection-level geographic resolution

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

• Original formation name spelling >>He-Shang-Gou<< is replaced by the much more common spelling >>Heshanggou<<. (TL)

•"Lower assemblage" of the Heshanggou Formation of the Ordos Basin, the age of which is based entirely upon biostratigraphy (see Nesbitt et al. 2011, Earth Env. Sci. Trans. Roy. Soc. Edinburgh). 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, Earth Env. Sci. Trans. Roy. Soc. Edinburgh)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithified, red sandstone

Size class: macrofossils

Reposited in the IVPP

Collection methods: surface (float), mechanical,

• The holotype specimen from this locality (He-Shang-Gou Formation) is in good condition- A second specimen is noted from "the Er-Ma-Ying Formation at Zhungeerqi, Inner Mongloia". 16 additional individuals of the same taxon collected from the nearby (17.5 km) Gucheng locality are "in rather poor condition."

Primary reference: J. L. Li. 1983. Tooth replacement in a new genus of procolophonid from the Early Triassic of China. Palaeontology 26(3):567-583 [J. Alroy/R. Whatley/T. Liebrecht]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 27134: authorized by John Alroy, entered by Robin Whatley on 19.11.2002

Creative Commons license: CC BY (attribution)