Where: Nei Mongol, China (41.3° N, 119.2° E: paleocoordinates 42.9° N, 122.8° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Daohugou Formation, Callovian to Callovian (166.1 - 157.3 Ma)

• The age of the Daohugou fauna has been controversial. Liu et al. (2012) obtained U-Pb shrimp ages of 160.5 and 161.0 Myr on ash beds associated with fossils of the Daohugou fauna, suggesting a Callovian-Oxfordian age.

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine - large; lithified, tuffaceous shale

Size classes: macrofossils, mesofossils

Preservation: mold/impression, adpression

Collected in 2012; reposited in the NIGPAS

Collection methods: bulk, quarrying, mechanical

• All type materials are housed at the Nanjing Institute of Geology and Palaeontology

Primary reference: J. F. Zhang. 2012. Distinct but rare archisargid flies from Jurassic of China (Diptera, Brachycera, Archisargidae) with discussion of the systematic position of Origoasilus pingquanensis Zhang et al, 2011. Journal of Paleontology 86:878-885 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 133221: authorized by Matthew Clapham, entered by Matthew Clapham on 06.09.2012

Creative Commons license: CC BY (attribution)