Where: Amur, Russian Federation (49.5° N, 129.5° E: paleocoordinates 51.6° N, 116.1° E)

• small collection-level geographic resolution

When: Udurchukan Formation (Tsagayan Group), Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• Tsagayan Formation, probably from Lower member (possibly upper part of lower member). 66±1 Ma U-Pb age average obtained by LA-ICP-MS dating of single igneous zircons from a tuff bed located in the uppermost part of the Middle Tsagayan Subformation (Knittel et al., 2013). Lower Tsagayan = Udurchukan Fm.

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Preservation: mold/impression

Collected by A N Krishtofovich in 1914; reposited in the PIN

• first discovered by A. Ya. Gurov

Primary reference: Y. A. Popov. 1971. Historical development of the infraorder Nepomorpha (Heteroptera). Akademiya Nauk SSSR, Trudy Paleontologicheskogo Instituta 129:1-228 [M. Clapham/J. Karr/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 149317: authorized by Matthew Clapham, entered by Jered Karr on 01.08.2013

Creative Commons license: CC BY (attribution)