Where: Japan (36.5° N, 137.5° E: paleocoordinates 43.6° N, 140.6° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Arimine Formation, Middle Oxfordian (161.2 - 155.7 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified siltstone

Size class: macrofossils

Preservation: mold/impression

Collection methods: Repository: National Museum of Nature and Science, Tokyo (NMNS)

Primary reference: T. Sato and T. Yamada. 2014. A new Oxfordian (Late Jurassic) ammonite assemblage from the Arimine Formation (Tetori Group) in the Arimine area, southeastern Toyama Prefecture, northern Central Japan. Bulletin of the National Museum of Nature and Science, Series C, Geology and Paleontology 40:21-55 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 182864: authorized by Matthew Clapham, entered by Matthew Clapham on 27.11.2016

Creative Commons license: CC BY (attribution)