Xiaoba section, Anxian county, bed 20 (Permian of China)

Where: Sichuan, China (31.6° N, 104.3° E: paleocoordinates 8.8° N, 91.2° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Changxing Formation, Changhsingian (254.2 - 252.2 Ma)

• bed-level stratigraphic resolution

Environment/lithology: lithified limestone

Size class: microfossils

Primary reference: Z. S. Li, Z. P. Zhan, J. Y. Dai, R. G. Jin, X. F. Zhu, J. H. Zhang, H. Q. Huang, D. Y. Xu, Z. Yan and H. M. Li. 1989. Study on the Permian-Triassic Biostratigraphy and Event Stratigraphy of Northern Sichuan and Southern Shaanxi 1-435 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 148500: authorized by Matthew Clapham, entered by Matthew Clapham on 20.07.2013

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Ostracoda
 Platycopida - Knoxitidae
Knoxiella englundi
 Podocopida - Microcheilinellidae
Microcheilinella anxianensis n. sp.
Microcheilinella anxianensis n. sp. Xie 1989 ostracod
 Podocopida - Cytherideidae
Basslerella obesa
Basslerella obesa Kellett 1935 ostracod
 Podocopida - Bairdiocyprididae
? Silenites sp.
 Podocopida - Bairdiidae
Abrobairdia brevicosta, Ceratobairdia xiaobaensis n. sp., ? Lobobairdia sp., Bairdiacypris sp., Bairdia sp., Bairdia hassi, Bairdia guangxiensis, Bairdia cf. garrisonensis, Petasobairdia sp.
Abrobairdia brevicosta Chen 1982 ostracod
Ceratobairdia xiaobaensis n. sp. Xie 1989 ostracod
? Lobobairdia sp. Kollmann 1963 ostracod
Bairdiacypris sp. Bradfield 1935 ostracod
Bairdia sp. M'Coy 1844 ostracod
Bairdia hassi Sohn 1960 ostracod
Bairdia guangxiensis Guan 1978 ostracod
Bairdia cf. garrisonensis Upson 1933 ostracod
Petasobairdia sp. Chen 1982 ostracod