Where: Hokkaido, Japan (43.8° N, 142.0° E: paleocoordinates 44.1° N, 141.1° E)

• coordinate stated in text

When: Horokaoshirarika Formation, Messinian (7.2 - 5.3 Ma)

• The diatom assemblage of the matrix of NFL 18 is assigned to NPD 7A (6.5–7.7Ma) of Yanagisawa & Akiba (1998), based on the occurrence of Rouxia californica and absence of Thalassionema schraderi and Neodenticula kamtschatica. The lack of Nitzschia pliocena suggests that the NFL 18 horizon is the upper part of NPD 7A (6.5–6.8Ma: latest Miocene, Messinian) (Supplemental material, Table 3).

• formation-level stratigraphic resolution

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Primary reference: Y. Tanaka and M. Watanabe. 2019. An early and new member of Balaenopteridae from the upper Miocene of Hokkaido, Japan. Journal of Systematic Palaeontology [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 84053: authorized by Mark Uhen, entered by Mark Uhen on 16.09.2008

Creative Commons license: CC BY (attribution)