Where: Japan (39.9° N, 141.9° E: paleocoordinates 53.1° N, 140.9° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Hiraiga Formation, Late/Upper Aptian (122.5 - 113.0 Ma)

• STRATIGRAPHIC RELATIONS: From the Hiraiga Fm. AGE: Late Aptian; justification for age not reported in text. STRATIGRAPHIC POSITION: From the middle part of the lower cycle of the Hiraiga Fm.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, fine-grained, shelly/skeletal, calcareous sandstone

Size class: macrofossils

Collected by Hanai & Hanai

• COLLECTOR: T. Hanai and I. Hanai. REPOSITORY: Not stated in text.

Primary reference: T. Kase. 1984. Early Cretaceous marine and brackish-water Gastropoda from Japan 1-262 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 91287: authorized by Austin Hendy, entered by Austin Hendy on 14.09.2009

Creative Commons license: CC BY (attribution)