Where: Yunnan, China (24.4° N, 99.2° E: paleocoordinates 38.9° S, 95.3° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Dingjiazhai Formation, Artinskian (290.1 - 279.3 Ma)

• Conodonts have also been found in the limestones of the Dingjiazhai Formation in the Baoshan Block and most indicate an Artinskian age. Ueno et al. (2002) reported Sweetognathus bucaramangus (Rabe, 1977), S. whitei, and Mesogondolella bisselli in the Dingjiazhai area and suggested that they indicate a middle Artinskian age. Wang et al (2004) identified Sweetognathus inornatus Ritter, 1986, S. sp., and Mesogondolella sp. from the lower part of the limestones in the Aluotian area, and Rabeignathus yunnanensis Wang et al., 2004, Sweetognathus whitei, S. sp., Mesogondolella cf. M. dentiseparata (Chernykh and Reshetkova, 1987), Homeoranognathus? sp. from the upper part, suggesting a late Sakmarian and early Artinskian in age respectively. Ji et al. (2004) also reported Rabeignathus bucaramangus (Rabe, 1977), Homeoiranognathus huecoensis (Ritter, 1986), Sweetognathus inornathus, S. whitei, Mesogondolella cf. M. bisselli from the Aluotian Section and considered the fauna to be middle Artinskian in age.

• group of beds-level stratigraphic resolution

Environment/lithology: lithified limestone

Size class: macrofossils

Collection methods: peel or thin section

• Repository: Nanjing University

Primary reference: Y. K. Shi, H. Huang, X. C. Jin and X. N. Yang. 2011. Early Permian fusulinids from the Baoshan Block, western Yunnan, China and their paleobiogeographic significance. Journal of Paleontology 85:489-501 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 208250: authorized by Matthew Clapham, entered by Matthew Clapham on 25.03.2020

Creative Commons license: CC BY (attribution)