Where: Yamaguchi, Japan (34.3° N, 131.0° E: paleocoordinates 44.9° N, 138.7° E)

• coordinate estimated from map

• small collection-level geographic resolution

When: Protogrammoceras nipponicum ammonoid zone, Nishinakayama Formation (Toyora Group), Early/Lower Toarcian (183.0 - 182.0 Ma)

• Lithostratigraphic unit Nm of Hirano, 1971

•Age called upper Domerian to Lower Whitbian

• group of beds-level stratigraphic resolution

Environment/lithology: estuary or bay; lithified, black mudstone

Size class: macrofossils

Preservation: mold/impression

Collected by Sotoji Imamura & Hiroko Ishine

Primary reference: I. Fujiyama. 1974. A Liassic Cockroach from Toyora, Japan. Bulletin of the National Science Museum 17(4):311-314 [M. Clapham/J. Karr/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 116101: authorized by Matthew Clapham, entered by Jered Karr on 05.09.2011

Creative Commons license: CC BY (attribution)