Duoma District, Rutog County, Upper Zhanjin Formation (Permian of China)

Where: Xizang, China (33.7° N, 80.3° E: paleocoordinates 43.0° S, 72.4° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Zhanjin Formation, Sakmarian (295.5 - 290.1 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Primary reference: B. P. Liu and X. S. Cui. 1983. Discovery of Eurydesma fauna from Rutog, northwest Xizang (Tibet), and its biogeographic significance. Earth Science - Journal of Wuhan College of Geology 19(1):79-92 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 97289: authorized by Matthew Clapham, entered by Matthew Clapham on 21.07.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Pectinida - Eurydesmatidae
Eurydesma subovatum Reed 1936 scallop
"Eurydesma cf. globosum" = Eurydesma cordatum Morris 1845 scallop
Eurydesma mytiloides Reed 1932 scallop
Eurydesma playfordi Dickins 1957 scallop
 Pholadomyida - Megadesmidae
Megadesmidae "indet. 1" Vokes 1967 clam
Megadesmidae "indet. 2" Vokes 1967 clam
Megadesmus sp. Sowerby 1838 clam
 Trigoniida - Schizodidae
Schizodus cf. meekanus Girty 1900 clam
 Nuculanida - Malletiidae
? Palaeoneilo sp. Hall and Whitfield 1869 clam