Where: Japan (42.8° N, 142.2° E: paleocoordinates 46.9° N, 131.4° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Hakobuchi Formation, Early/Lower Maastrichtian (70.6 - 66.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, muddy sandstone

Size class: macrofossils

Collection methods: Repository: Hobetsu Museum, Mukawa, Hokkaido

Primary reference: Y. Shigeta and T. Nishimura. 2014. A new species of Anagaudryceras (Ammonoidea, Gaudryceratidae) from the lowest Maastrichtian of Hokkaido, Japan. Paleontological Research 18:176-185 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 174602: authorized by Matthew Clapham, entered by Matthew Clapham on 16.11.2015

Creative Commons license: CC BY (attribution)