Where: Miyagi, Japan (38.8° N, 141.5° E: paleocoordinates 38.5° N, 118.8° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Hiraiso Formation, Spathian (251.3 - 247.2 Ma)

• Bando (1970) originally assigned the Hiraiso Fm. to the Griesbachian, later it was assigned to the Smithian by Nakazawa et al. (1994). Reidentification of Bando's ammonite as Neocolumbites and discovery of Tirolites in the lower part of the formation suggests a Spathian age for the Hiraiso Formation (Shigeta & Nakajima, 2017). Listed fossils belong to the Facies Hc, one of nine identified facies in the Hiraiso Fm.

• group of beds-level stratigraphic resolution

Environment/lithology: offshore; sandstone and bioturbated siltstone

Size class: macrofossils

Preservation: mold/impression

Primary reference: Y. Kashiyama and T. Oji. 2004. Low-diversity shallow marine benthic fauna from the Smithian of northeast Japan: paleocologic and paleobiogeographic imlications. Paleontological Research 8(3):199-218 [W. Kiessling/S. Nurnberg/S. Nurnberg]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 50118: authorized by Wolfgang Kiessling, entered by Sabine Nürnberg on 09.05.2005

Creative Commons license: CC BY (attribution)