Dong'anzhen Formation, Berriasian, eastern Heilongjiang, China (Cretaceous of China)

Where: Heilongjiang, China (47.3° N, 134.2° E: paleocoordinates 49.4° N, 137.0° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Dong'anzhen Formation (Longzhaogou Group), Middle Berriasian (145.0 - 140.2 Ma)

• approx. 75 m of strata in the Upper Dong'anzhen Formation; best considered as mid-Berriasian

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; lithified, silty mudstone and lithified, argillaceous siltstone

Size class: macrofossils

Primary reference: J. Sha and F. T. Fursich. 1993. Biostratigraphy of the Upper Jurassic-Lower Cretaceous bivalves Buchia and Aucellina of eastern Heilongjiang, northeast China. Geol. Mag. 130(4):533-542 [M. Aberhan/S. Nurnberg]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 59662: authorized by Martin Aberhan, entered by Sabine Nürnberg on 06.04.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

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Bivalvia
 Nuculanida - Malletiidae
Palaeoneilo sp.
Palaeoneilo sp. Hall and Whitfield 1869 clam
 Nuculida - Nuculidae
Palaeonucula sp.
Palaeonucula sp. Quenstedt 1930 nut clam
 Pectinida - Pectinoidae
Camptonectes ex gr. wandaensis
 Pectinida - Propeamussiidae
Propeamussium sp.
Propeamussium sp. de Gregorio 1884 mud scallop
sp. nov.
 Pectinida - Buchiidae
Buchia cf. subokensis, Buchia unschensis, Buchia donganensis, Buchia ex gr. unschensis, Buchia sp., Buchia cf. fischeriana, Buchia aff. fischeriana, Buchia cf. okensis, Buchia volgensis
Buchia sp. Rouillier 1845 scallop
sp. nov.?
Buchia cf. fischeriana d'Orbigny 1845 scallop
Buchia aff. fischeriana d'Orbigny 1845 scallop
Buchia cf. okensis Pavlow 1907 scallop
Buchia volgensis Lahusen 1888 scallop
 Pectinida - Oxytomidae
Oxytoma sp.
Oxytoma sp. Meek and Hayden 1865 scallop